Apakrash and Upagraha Computation in Vedic Astrology

Apart from the 9 planets which is taken in consideration as the Navagrahas in Vedic Astrology, there are also certain sensitive points which arise based on specific computations which are known as Apakrash and Upagrahas. These are also quite crucial in the judgement of a horoscope especially in the case of transits or prasna analysis. The Apakrash Grahas occur based on the degree of Sun in a horoscope whereas Upagrahas are time slots assigned to each of the 7 planets (barring Rahu and Ketu) based on which the degree in which they rise are ascertained.

It is pertinent to note that when calculating the Apakrash Grahas, you don't need to know any other detail except for the longitude degree of the Sun as it's through the position of it only these non luminous points are deduced. Upagrahas on the other hand are considered as the shadowy son's of the planets and arise from the kalavelas assigned to each of the planets where a day is divided into two halves of eight parts each ruled by 7 of the planets from Sun to Saturn with the 8th portion being lord less (At times though it's also said this blank portion is ruled by Rahu). Thus, it is not even necessary to have accurate time of birth for Upagraha computation and we just slot them in the requisite sign in a horoscope as it will rise the same time irrespective of when a native is born across day time or night time based on the time at which each of the planetary portions rise.

Apakrash: (Computed from Sun's Longitudinal degree)
➜ Dhooma (Mars)
➜ Vyatipata (or Pata) (Rahu)
➜ Parivesha (or Parivela) (Moon)
➜ Indrachapa (or Chapa/Indradhanush) (Venus)
➜ Upaketu (or Dhwaja/Sikhi) (Ketu)

Upagraha: (Computed from portions assigned to each planet in day time and night time)
➜ Kala (Sun)
➜ Paridhi (Moon)
➜ Mrityu (Mars)
➜ Ardhaprahara (or Ardhayama) (Mercury)
➜ Yamaghantaka (Jupiter)
➜ Kodanda (or Karmuka) (Venus)
➜ Gulika (Saturn)
➜ Mandi (Saturn)

Apakrash
There are 5 Apakrash Grahas which fall on 5 different points in the 360 degree zodiac. They are all arrived with Sun as the basis and all of them are generally said to be malefic by nature. The calculation of the 5 Apakrash Grahas are as below:

- Dhooma : Sun + 133°20' (or Indrachapa + 180°)
- Vyatipata : 360° - Dhooma  (or Parivesha + 180°)
- Parivesha :  Vyatipata + 180°
- Indrachapa : 360° - Parivesha (or Dhooma + 180°)
- Upaketu : Indrachapa + 16°40' (or Sun - 30°)

Rules in Computing Apakrash:
1) Ascertain the degree of the Sun in the natal horoscope.
2) Convert the degree of the Sun in a sign as per the 360 degree zodiac
3) Apply the formula with the result arrived on previous step to arrive at degree of Apakrash
4) Place the result arrived at of the Apakrash degrees as per 360 degree zodiac to the respective zodiac sign and relevant degree.

Illustration:
Lets compute the 5 Apakrash for a native born on Jun 6th 2019 at 1.10 PM in Chennai, India.
1) Degree of Sun in Horoscope - Taurus 21° 13'
2) Conversion of Sun as per 360 degree zodiac - 51° 13'
3) Apply Formula to arrive at Apakrash Grahas
Dhooma : Sun + 133°20' = 51° 13' + 133°20' = 184°33'
Vyatipata : 360° - Dhooma = 360° - 184°33' = 175°27'
Parivesha : Vyatipata + 180° = 175°27' + 180° = 355°27'
Indrachapa : 360° - Parivesha = 360° - 355°27' = 4°33'
Upaketu : Indrachapa + 16°40' = 4°33' + 16°40' = 21°13'
4) Apakrash Placement in Zodiac sign with degrees
Dhooma - Libra 4°33'
Vyatipata - Virgo 25°27'
Parivesha - Pisces 25°27'
Indrachapa - Aries 4°33'
Upaketu - Aries 21°13'

Note: It must be noted that Dhooma and Indrachapa will always be 180° apart and likewise Vyatipata and Parivesha will also always be 180° away from each other. Also Upaketu plus 30° will always end up being the resultant degree of Sun in the Natal Horoscope. If the total while computing exceed 360° in step 3, we need to subtract 360° from the exceeded total.

Upagrahas
The Upagrahas are basically the shadowy son's of the respective 7 planets from Sun to Saturn. Each of the planets rule a time interval of approximately an hour and half during day time and another hour and half during night time. The Ascendant degree rising at the beginning of the time frames ruled by these planets determine the Upagraha calculations. Unlike Apakrash, all Upagrahas are not considered to be malefic. The one main Upagraha considered in horoscope analysis happens to be Saturn's son Mandi which arises out of the time portion assigned to it known as Gulika Kaala. We must however be cognizant of the fact that Gulika and Mandi are not one and the same and that Mandi degree will fall somewhere within the range of the time period provided to Saturn and will always be different when compared to the rising degree of Gulika.

There are two considerations that need to be factored into account while calculating the Upagrahas
1) By dividing the day and night into 8 equal parts ruled by 7 of the planets with one portion being left blank. In the portions ruled by the 7 planets the beginning portion of it is where the respective Upagrahas will rise. This will hold good for all the Upagrahas ruling Sun to Saturn.
2) For Mandi alone, there is a feature which is given in classical texts to compute based on specific ghatikas elapsed. This is exclusively given for computation of Mandi (Saturn's son), As per vedic calendar, time is divided into Ghatikas with each Ghatika comprising of 24 minutes each. Hence there are 60 Ghatikas in a day occurring from sunrise to next day sunrise when day and nights are equal. The day time and night time are usually divided into 30 Ghatikas each but however this will have to be proportionately increased or decreased accordingly as the length of day time or night time is greater or lesser than the aforesaid 30 ghatikas.

Time Frames ruled by the Planets and time of Upagraha Rising:
The following are the portions ruled by the 7 planets in each of the days along with the information of elapsed time intervals in which the Upagrahas rise on each of the days from Sunday to Saturday

Kala - Sun:
Kala happens to be the shadowy son of the luminary Sun. The time intervals ruled by Sun in each of the days are as follows:
Sunday - Day Time 1st part, Night Time 5th part
Monday - Day Time 8th part, Night Time 4th part
Tuesday - Day Time 7th part, Night Time 3rd part
Wednesday - Day Time 6th part, Night Time 1st part
Thursday - Day Time 5th part, Night Time 8th part
Friday - Day Time 4th part, Night Time 7th part
Saturday - Day Time 3rd part, Night Time 6th part

Paridhi - Moon:
Paridhi happens to be the shadowy son of the luminary Moon. The time intervals ruled by Moon in each of the days are as follows:
Sunday - Day Time 2nd part, Night Time 6th part
Monday - Day Time 1st part, Night Time 5th part
Tuesday - Day Time 8th part, Night Time 4th part
Wednesday - Day Time 7th part, Night Time 2nd part
Thursday - Day Time 6th part, Night Time 1st part
Friday - Day Time 5th part, Night Time 8th part
Saturday - Day Time 4th part, Night Time 7th part

Mrityu - Mars:
Mrityu happens to be the shadowy son of Mars. The time intervals ruled by Mars in each of the days are as follows:
Sunday - Day Time 3rd part, Night Time 7th part
Monday - Day Time 2nd part, Night Time 6th part
Tuesday - Day Time 1st part, Night Time 5th part
Wednesday - Day Time 8th part, Night Time 3rd part
Thursday - Day Time 7th part, Night Time 2nd part
Friday - Day Time 6th part, Night Time 1st part
Saturday - Day Time 5th part, Night Time 8th part

Ardhaprahara - Mercury:
Ardhaprahara happens to be the shadowy son of Mercury. The time intervals ruled by Mercury in each of the days are as follows:
Sunday - Day Time 4th part, Night Time 8th part
Monday - Day Time 3rd part, Night Time 7th part
Tuesday - Day Time 2nd part, Night Time 6th part
Wednesday - Day Time 1st part, Night Time 4th part
Thursday - Day Time 8th part, Night Time 3rd part
Friday - Day Time 7th part, Night Time 2nd part
Saturday - Day Time 6th part, Night Time 1st part

Yamaghantaka - Jupiter:
Yamaghantaka happens to be the shadowy son of Jupiter. The time intervals ruled by Jupiter in each of the days are as follows:
Sunday - Day Time 5th part, Night Time 1st part
Monday - Day Time 4th part, Night Time 8th part
Tuesday - Day Time 3rd part, Night Time 7th part
Wednesday - Day Time 2nd part, Night Time 5th part
Thursday - Day Time 1st part, Night Time 4th part
Friday - Day Time 8th part, Night Time 3rd part
Saturday - Day Time 7th part, Night Time 2nd part

Kodanda - Venus:
Kodanda happens to be the shadowy son of Venus. The time intervals ruled by Jupiter in each of the days are as follows:
Sunday - Day Time 6th part, Night Time 2nd part
Monday - Day Time 5th part, Night Time 1st part
Tuesday - Day Time 4th part, Night Time 8th part
Wednesday - Day Time 3rd part, Night Time 6th part
Thursday - Day Time 2nd part, Night Time 5th part
Friday - Day Time 1st part, Night Time 4th part
Saturday - Day Time 8th part, Night Time 3th part

Gulika - Saturn:
Gulika happens to be the shadowy son of Saturn. The time intervals ruled by Jupiter in each of the days are as follows:
Sunday - Day Time 7th part, Night Time 3rd part
Monday - Day Time 6th part, Night Time 2nd part
Tuesday - Day Time 5th part, Night Time 1st part
Wednesday - Day Time 4th part, Night Time 7th part
Thursday - Day Time 3rd part, Night Time 6th part
Friday - Day Time 2nd part, Night Time 5th part
Saturday - Day Time 1st part, Night Time 4th part

Mandi - Saturn:
Mandi also happens to be the shadowy son of Saturn but the rising point is different than that of Gulika. This is based on the Ghatikas elapsed during day and night.
Mandi is said to rise after the following time intervals during day time and night time
Sunday - Day Time After 26th interval, Night time after 10th interval
Monday - Day Time After 22nd interval, Night time after 6th interval
Tuesday - Day Time After 18th interval, Night time after 2nd interval
Wednesday - Day Time After 14th interval, Night time after 26th interval
Thursday - Day Time After 10th interval, Night time after 22nd interval
Friday - Day Time After 6th interval, Night time after 18th interval
Saturday- Day Time After 2nd interval, Night time after 14th interval

Rules in Computing Upagrahas:
1) Ascertain whether a person was born during day time (sun rise to sun set) or during night time (sun set to next day sun rise)
2) If day time born, note the sun rise and sun set time of the day and if born in night time, note the sun set time and next day sun rise time.
3) Ascertain the length of duration of the day time or night time in minutes duration
4) Next divide the duration length into 8 equal parts or kaalas.
5) Next check the week day in which the native was born which could be any day between Sunday to Saturday.
6) See the portion ruled by the planet which will be one of 8 equal parts .
7) Figure out the time frame ruled by the planet which will be spanning a duration of approximately an hour and a half.
8) Mark the start, middle and end of this time slot ruled by the planet. The beginning rising time is most crucial but however it would also be prudent to mark the middle and end time as a check point.
9) Convert duration of the sunrise and sunset in Ghatikas and multiply with the elapsed portion of Upagraha by 24 which is value of a Ghatika in minutes divided by base denominator of 30 ghatikas. This is performed only for Mandi calculation.
10) Cast the horoscope for the rising time of the Upagrahas and note where the degree of the Ascendant (Lagna) falls. This would be the degree of the Upagrahas in the horoscope.

Illustration:
Lets compute all the Upagrahas for a person born on Jun 6th 2019 at 1.10 PM in Chennai, India.
1) Native born time - Day time
2) Since day time born - Sun rise time 5:45 AM and Sun set time 6:30 PM
3) Length of duration - 12 hours 45 minutes = 765 minutes
4) Average duration - 765/8 = 95.625 minutes rounded to 96 minutes
5) Check weekday - Thursday
6) Part ruled by 7 Planets :
Sun - 5th part
Moon - 6th part
Mars - 7th part
Mercury - 8th part
Jupiter - 1st part
Venus - 2nd part
Saturn - 3rd part
7) Figure time period ruled by all the planets -
Sun - 12:09 PM to 1:45 PM
Moon - 1:45 PM to 3:21 PM
Mars - 3:21 PM to 4:57 PM
Mercury - 4:57 PM to 6:33 PM
Jupiter -  5:45 AM to 7:21 AM
Venus - 7:21 AM to 8:57 AM
Saturn - 8:57 AM to 10:33 AM
8) Mark Start Time, Middle Time and End Time of all Planets -
Sun - Start time 12:09 PM, Middle time 12:57 PM, End time 1:45 PM
Moon - Start time 1:45 PM, Middle time 2:33 PM, End time 3:21 PM
Mars - Start time 3:21 PM, Middle time 4:09 PM, End time 4:57 PM
Mercury - Start time 4:57 PM, Middle time 5:45 PM, End time 6:33 PM
Jupiter - Start time 5:45 AM, Middle time 6:33 AM, End time 7:21 AM
Venus - Start time 7:21 AM, Middle time 8:09 AM, End time 8:57 AM
Saturn - Start time 8:57 AM, Middle time 9:45 AM, End time 10:33 AM
9) Check the rising time for Mandi based on Ghatikas elapsed (Start Time + Length of Duration in Ghatikas*Specific end duration of Ghatika /30 ghatikas*24 minutes per each Ghatika)
Mandi - 5:45 AM + 31.875*10/30*24 = 5:45 AM + 255 minutes = 10:00 AM
P.S: 31.875 is obtained by dividing 765 minutes which is total sunrise time by 24 minutes per Ghatika
10) Rising Ascendant of Upagrahas as per points 7 and 8 above for Mandi
Kala - Leo 20° 29'
Paridhi - Virgo 14° 16'
Mrityu - Libra 7° 44'
Ardhaprahara - Scorpio 0° 17'
Yamaghantaka - Taurus 20° 51'
Kodanda - Gemini 13° 10'
Gulika - Cancer 4° 57'
Mandi - Cancer 19° 29'

Note: The small difference in beginning time portion ruled by planet and rising time of upagraha is on account of rounding off time in minutes to the nearest decimal place. Calculations at a seconds level can yield more accurate results. For checking the rising degree of Ascendant, Traditional Lahiri Ayanamsa has been utilized. Sunrise time is considered based on the equation of 'The center of Sun's disk being truly on the eastern horizon'

Summary:
Listed below are the zodiac signs and respective degrees in which the Apakrash and Upagraha will rise as per the attached worked out illustration:
Apakrash:
1)Dhooma - Libra 4°33'
2) Vyatipata - Virgo 25°27'
3) Parivesha - Pisces 25°27'
4) Indrachapa - Aries 4°33'
5) Upaketu - Aries 21°13'
Upagraha:
6) Kala - Leo 20° 29'
7) Paridhi - Virgo 14° 16'
8) Mrityu - Libra 7° 44'
9) Ardhaprahara - Scorpio 0° 17'
10) Yamaghantaka - Taurus 20° 51'
11) Kodanda - Gemini 13° 10'
12) Gulika - Cancer 4° 57'
13) Mandi -  Cancer 19° 29'

Information:
It can be inferred that there are a total of 13 bodies comprising of Apakrash and Upagrahas. There are views stating that both the female planets Moon and Venus don't have Upagrahas and hence they should not be counted as part of the scheme. However since there is a time slot allocated to these planets based on when they rise, they have also been factored into account. Another opinion is that Gulika and Mandi are one and the same and there are also views that Gulika rises during the beginning whereas Mandi rises at the middle period of Saturn's time. This is not true as when the calculations are performed independently based on elapsed Ghatikas, the time differs somewhat from the exact mid point of Saturn's time zone. However it is clear that Mandi's time also will fall within the portion pigeonholed for Saturn.

The Apakrash are 5 in number and they are all based on the Sun's degree. If we look at things from a helio centric perspective, the planetary order is as Mercury -> Venus -> Earth -> Mars -> Jupiter -> Saturn -> Uranus -> Neptune -> Pluto. The planets before and after Earth namely Venus and Mars are considered and have been given the names Dhooma and Indrachapa. The Moon always revolves around the earth and hence Parivesha is considered for the Moon and the 2 nodal points of the Moon are Rahu and Ketu which have been assigned Vyatipata and Upaketu respectively.

The Upagrahas are 8 in number comprising of all the planets ruling the days of the week namely Sun for Kala, Moon for Paridhi, Mars for Mrityu, Ardhaprahara for Mercury, Yamaghantaka for Jupiter, Kodanda for Venus and Gulika for Saturn. Mandi happens to be another son of Saturn and rises within the slot assigned for Saturn but at a slightly different time.

The 8 Part Division of Time Cycle - Kala Vela, Gowri Panchanga, Choghadiya

'Time' is an essential component in the scheme of things when it comes to fixing an auspicious period for a Muhurat or for undertaking an important activity. One of the common bifurcations of time happens to be the splitting of day time and night time into 8 equal divisions each. Thus in essence there will be 16 time intervals in a day comprising of 8 each for sunrise and sunset with each of them running for a period of approx an hour and a half each depending upon the length of duration of sunrise and sunset. Each of these sub divisions are ruled by a said planet and said to connote a particular specification. Based on the methodology adopted, the computation differs taking an off shoot direction by adhering to certain principles and thus leading to a shift in the planetary sequence cabinet allotment. The 3 different types of 1/8th units of division of time (approx 90-96 minutes time frame) complied comprises of the following:

- Kala Vela
- Gowri Panchanga
- Choghadiya

Basic Concepts of Time and Day:
Before explaining the intricacies of how planetary time periods are allotted for these 3 metrics, it will be good to recall the over arching hierarchy of how time gets recorded in the vedic calendar. This is exclusively defined from one of the five elements of the Panchang titled the Vara or Day.

There are 7 Vara's obtained from the 7 week days and each of them are represented by a particular planet as seen below:
Sunday - Sun
Monday - Moon
Tuesday - Mars
Wednesday - Mercury
Thursday - Jupiter
Friday - Venus
Saturday - Saturn

Each day of the week comprises of the time beginning from sunrise and ends during the next day sunrise when the next day commences. Within this period of a whole day, we divide it into two portions viz sun rise (day time) and sun set (night time). The Sun rise or day time period runs from when the sun rises in the east till the time it sets in the west. Likewise the Sun set or night time period runs from when the sun sets in the west till the time it rises again in the east.

Now, the respective sun rise and sun set portions are bifurcated further into 8 equal parts each and that's where ruling planets are assigned to each one of them. The order of the sunrise period always begins from the order of the weekday and the sunset period begins from the 5th day of the weekday and follows a specific order. For instance Sunrise period on a Sunday always starts from Sun whereas the sunset period commences from Jupiter since it happens to be the lord of the 5th weekday from Sunday (Thursday is 5th day beginning from Sunday and it's ruler is Jupiter).

Kala Vela:
The Kala vela time periods signify that portion of time slots which are primarily ruled by each of the planets from Sun to Saturn in a particular weekday operating from sunrise to sunset and again from sunset to next day sunrise. It is through these 1/8th time zoned periods of sunrise and sunset that we account for inauspicious sub periods such as Yama Ghanta Kala and Gulika Kala.

The Kala time is said to be the shadowy portion of the planets and is mainly used for delineating the time frame ruled by each of the planets. In general parlance these are termed as Upagrahas or in essence the son's of the respective 7 planets Sun, Moon, Mars, Mercury, Jupiter, Venus and Saturn.

As mentioned, there are 7 weekdays but 8 equal parts each for sunrise and sunset. Hence 7 of these parts will be assigned to a particular planet with the 8th being headless and given to Rahu. The sequence goes as Sun-Moon-Mars-Mercury-Jupiter-Venus-Saturn-Rahu. The order starts from the ruling planet of the particular weekday for sunrise and 5th day of weekday for sunset.

Let us go about computing the kala vela order for a Friday. Since the day is Friday, first part for sunrise is assigned to the lord of the weekday Friday which is Venus. After that it will be lord of Saturday Saturn in the 2nd part followed by headless portion Rahu taking charge in the 3rd part and after that Sunday Lord Sun ruling 4th part, Monday Lord Moon ruling 5th part, Tuesday Lord Mars ruling 6th, Wednesday Lord Mercury heading the 7th part and finally followed by Thursday Lord Jupiter ruling the 8th and final part of sunrise. For sunset, order will begin from the 5th day of the weekday which in this case will be Mars since Tuesday is the 5th weekday from Friday. Thus the sequence will be Mars-Mercury-Jupiter-Venus-Saturn-Rahu-Sun-Moon making up the 8 parts of sunset.

The Kala Vela classifications with the names of the planet's son or upagraha is described below:
Sun - Kala
Moon - Paridhi
Mars - Mrityu
Mercury - Ardhaprahara
Jupiter - Yamaghanta
Venus - Indrachapa
Saturn - Gulika

Gowri Panchanga:
In the traditional sense, Gowri Panchanga is used to check auspicious time to start a new activity and avoid inauspicious time. From a religious perspective it is mainly used to decipher the right time for the purpose of a Muhurat.

The computation of time slot for Gowri Panchanga works through the following premise. As mentioned above the sunrise and sunset time are split into 8 equal parts and are assigned a planet each beginning from the weekday for sun rise (day time) and 5th day of the weekday for sun set (night time).

The only difference between the time periods of Gowri Panchanga and Kala Vela is due to the special timezone factoring of Rahu which causes changes to the planetary sequence. The Rahu period is always assigned a particular time slot for each day of the week on both sunrise and sunset and when that period arises, Rahu is always given precedence and the next planet succeeds the time period after Rahu and the similar weekday order follows. The parts assigned to Rahu for every day beginning from Sunday to Saturday during sunrise period happens to be 8th, 2nd, 7th, 5th, 6th, 4th and 3rd. During sunset period the parts assigned for every day beginning from Sunday to Saturday are 4th, 5th, 3rd, 8th, 2nd, 7th, 6th. It should however be noted that Rahu never rules the 1st part on any day whether it's a sunrise or sunset.

Rahu Kaala time is said to be associated with ultra violet rays falling on the earth that are not visible to the naked eyes. It is specifically noted that ultra violet particles fall on those portions of time assigned to Rahu on every day of the week during both sunrise and sunset and this is the main reasons that the time order of planets get impacted in order to factor this phenomenon.

To understand the concept in a simple manner, let us see how to go about computing the time slots for a Wednesday. Since the day is Wednesday, for sunrise first part is assigned to the lord of the weekday Wednesday which is Mercury. After that it will be lord of Thursday Jupiter followed by Friday lord Venus, Saturday Lord Saturn, Sunday Lord Sun, Monday Lord Moon and Tuesday Lord Mars. So we have the order of Mercury-Jupiter-Venus-Saturn-Sun-Moon-Mars. Now we have 7 planets but 8 parts need to be filled. On Wednesday during sunrise period Rahu occupies the 5th part. Hence order from Mercury-Jupiter-Venus-Saturn will remain the same and after this Rahu will come in 5th part pushing the Sun to 6th, Moon in to the 7th and Mars will finally own the 8th spot. For sunset first part is assigned to the 5th day of the weekday which is Sun (Sunday is 5th day from Wednesday). Also we know that Rahu rules the 8th part in sunset. Hence the order will be Sun-Moon-Mars-Mercury-Jupiter-Venus-Saturn-Rahu.

The Gowri Panchanga classification of planets along with the meanings indicated are listed below:
Sun - Uthi (Plan)
Moon - Amirtha (Sweet)
Mars - Rogam (Evil)
Mercury - Laabam (Gain)
Jupiter - Dhanam (Wealth)
Venus - Sugam (Comfort)
Saturn - Soram (Bad)
Rahu - Visham (Poison)

Choghadiya:
Choghadiya is again a measurement of time very similar to Gowri Panchanga and used for determining muhurat and establishing most suitable time frames to perform auspicious activities. It is more prevalent in the North of India as opposed to its counterpart Gowri Panchang which is followed predominantly in the South. They both work in a like for like vein and also tend to connote similar descriptions of the time calendar.

The main difference between the two happens to be the non factoring of the Rahu time zone for Choghadiya. Thus, it makes use of only 7 planets sans Rahu with the 8th slot being partaken by the planet that began proceedings of the 8 part sequence. The other tilt in the time computation takes place in the sequence followed which is that of the Hora order based on the distance of planets or the order of decreasing speed of planets with respect to the earth. Saturn being the farthest comes first in the order followed by Jupiter, next Mars, then Sun followed by Venus, Mercury and finally the Moon. The sequence of this order however always begins with the planet owning the weekday for sun rise day time and 5th day from the weekday for sunset night time.

Let's understand the order flow of Choghadiya with an illustration of how it is arrived at for a Thursday. Since the day is Thursday, for sunrise portion, first part is assigned to the lord of the weekday Thursday which is Jupiter. From here it will follow the order of decreasing speed of planets with the second part given to Mars (faster in speed to Jupiter), 3rd part to Sun (faster to Mars) followed by 4th part to Venus (faster than Sun) with 5th part to Mercury (being faster than Venus), 6th part to Moon (being fastest planet of them all) followed again by 7th part to Saturn (slowest planet of all) and finally 8th part aligned back to Jupiter which started the sequence. For sunset also similar process follows but starting from the 5th day of the weekday which in this case will be Moon being the 5th weekday from Thursday. Thus the 1st part will be Moon, followed by Saturn, then Jupiter, after that Mars and toeing along will be Sun, Venus, Mercury and the final 8th part will be ruled by Moon again.

The Choghadiya classification of planets along with the meanings indicated are listed below:
Sun - Udyoga (Administrative)
Moon - Amrita (Nectar)
Mars - Roga (Fight)
Mercury - Labha (Profit)
Jupiter - Shubha (Favorable)
Venus - Chala (Movement)
Saturn - Kaala (Unfavorable)

Conclusion:
From a panoptic view each of the measures of Kala Vela, Gowri Panchanga and Chogadiya all tailor towards the 8 divisions of cycles of time and look inherently similar to one another but however they all have their own individual significance and tend to branch out when it comes to assigning planetary time periods. Kala Vela follows the weekday order and has a portion which is blank given to Rahu. Gowri Panchanga on the other hand also follows the weekday order but the planetary sequence gets entangled due to the dichotomy of Rahu which is specially carved out to configure the Rahu Kaalam time. Chogadiya on the other hand does not consider Rahu into picture at all and allocates the portions only to the 7 embodied planets but however it follows the hora order course of action. Hence each of these metrics form an integral part within the time landscape and they all are conventionally similar yet eerily different from each other

Nutshell:
Kala Vela:
7 planets plus one headless portion for Rahu and follows weekday sequence order beginning from lord of the weekday for sunrise and lord of the 5th weekday for sunset.

Gowri Panchanga:
8 planets including Rahu and follows weekday sequence order beginning from lord of the weekday for sunrise and lord of the 5th weekday for sunset. Exclusively factors Rahu time period causing a tweak to the regular weekday planetary order.

Chogadiya:
7 planets excluding Rahu and follows hora sequence order beginning from lord of the weekday for sunrise and lord of the 5th weekday for sunset.

Snapshot:
Sharing below a snapshot of the ruling planets of Kala Vela, Gowri Panchanga and Choghadiya considering sunrise and sunset as 6AM and 6PM respectively. If the sunrise or sunset time happens to be earlier or later than clock time of 6, it needs to be adjusted accordingly. This roster however provides a summarized view of the exact sequence of planetary order ruling the 8 parts each in both the sunrise and sunset time framework.