Sun Sign (Surya Rashi)

The panel above gives the Sun's sidereal sign, its degree and its nakshatra for your birth date, and the short sections under it outline the arithmetic. This long read goes further. It sets out what the classical texts in this app's library say about the Sun and the sign it stands in, walks through the calculation with the real numbers for the sample date, explains every kind of result the page can return, lists the dates on which this engine moves the Sun from one sign to the next, measures how much a birth time, a place and a clock can change the answer, and follows this Sun into the other parts of the app that read it.

What the texts mean by the Sun and its sign

BPHS Ch. 3 Sl. 12-13 gives each graha one office: the Sun is the soul of all, the Moon is the mind, Mars is strength. Sl. 14-15 place the Sun and the Moon as the two grahas of royal status, and Sl. 11 counts the Sun among the natural malefics, with Saturn, Mars, the waning Moon and the nodes. Saravali Ch. 4 Sl. 21 describes the Sun as sharp-minded, courageous, steady and majestic. The Sun in Vedic astrology page covers the graha itself; this page is about one fact, which of the twelve rashis it stood in at your birth.

Santhanam's note to BPHS Ch. 3 says plainly that the Sun's motion is an apparent one, seen from a moving Earth, and gives its average daily motion as one degree. Sl. 8-9 then ask for the positions of the grahas at a given time to be taken by Drikganit, calculation of the sky as it is observed. That is what this page does. Measured on this engine for every date from 1950 to 2025, the Sun moved between 0.9533 and 1.0193 degrees a day and 0.9856 on average, so the commentary's one degree is a fair round figure.

In Indian practice the rashi people ask for, the one used in matching and the one the dashas start from, is the Moon's, which the Moon Sign calculator reads. The Sun's sign does different work. It fixes the Sun's dignity, it is the sign the solar yogas are counted from, the Sun's longitude is the point from which combustion and the tithi are measured, and its yearly return to the same longitude defines the annual chart.

The Sun's dignity, sign by sign

BPHS Ch. 3 Sl. 49-50 names Mesh (Aries) as the Sun's sign of exaltation, with the deepest exaltation at 10 degrees, and puts its debilitation in the seventh sign from there, Tula (Libra), at the same 10 degrees. Sl. 51-54 say that in Simh (Leo) the first 20 degrees are the Sun's mooltrikona and the rest is his own sign, and Ch. 4 Sl. 12 describes Simh as ruled by the Sun, a royal sign, strong in the daytime.

For the other nine signs the Sun's standing depends on its relationship with the sign's lord, and BPHS Ch. 3 Sl. 55 gives the rule for working that out. Take the signs that are 2nd, 4th, 5th, 8th, 9th and 12th from a graha's mooltrikona sign; their lords are its friends, as is the lord of its exaltation sign; the other lords are its enemies; and a lord that lands on both lists is neutral. Counted from Leo those six signs are Virgo, Scorpio, Sagittarius, Pisces, Aries and Cancer, ruled by Mercury, Mars, Jupiter, Jupiter, Mars and the Moon. Mercury also rules Gemini, the 11th from Leo, which is not on the list, so Mercury comes out neutral. Venus (Taurus and Libra) and Saturn (Capricorn and Aquarius) own no listed sign and are enemies. The result - friends Moon, Mars and Jupiter, neutral Mercury, enemies Venus and Saturn - is exactly the relationship table this app's engine carries.

Three things about that table need saying. First, the Leo rows follow BPHS Sl. 51-54: mooltrikona in the first twenty degrees, own sign in the last ten. Until October 2026 the engine's table, which its code attributed to Kannan's Fundamentals of Hindu Astrology, had them the other way round. Second, the table shows the natural relationship only. In a real chart the engine adds the temporary relationship of BPHS Sl. 56-58 - a sign lord standing in the 2nd, 3rd, 4th, 10th, 11th or 12th from the Sun is a temporary friend, otherwise a temporary enemy - and that can move a Sun in any of the nine relationship signs one tier up or down. Third, the weights follow Kannan's ladder (full, three quarters, five eighths, half, nil), not BPHS Sl. 59-60, which gives mooltrikona three quarters, an own sign half, a friend's sign a quarter and a neutral sign an eighth.

This calculator does not print a dignity; it reports where the Sun is, not how well placed it is. The Shad Bala calculator does, and needs a birth time and place. For the sample date with a 06:42 birth in Ahmedabad it returns the Sun in Cancer as "a friendly sign in Cancer, dusthana house (12th)", position strength 6.25, total 12.29 out of 20, labelled Medium.

The Sun in each sign: Saravali's chapter and the line this app shows

Saravali Ch. 22 is the classical reading of the Sun in each rashi. It gives a base reading for each of the twelve signs and then, grouped by the sign's lord, six more readings for that Sun aspected in turn by the Moon, Mars, Mercury, Jupiter, Venus and Saturn: the signs of Mars (Sl. 4-9), of Venus (Sl. 12-17), of Mercury (Sl. 20-25), Cancer (Sl. 28-33), Leo (Sl. 36-41), the signs of Jupiter (Sl. 50-55) and of Saturn (Sl. 58-63). That is twelve base readings and forty-two aspect readings.

The base readings mix temperament with descriptions of the body, statements about illness, marriage, livelihood and kingship, all phrased as certainties, and they track the dignities: the exalted Sun in Aries gets one of the most favourable readings and the debilitated Sun in Libra one of the harshest. This app does not reproduce them. What it shows is one line of temperament per Sun sign, written in its own words; the engine's header says the lines are a curated paraphrase of Kannan, Chapters XII-XIII, keeping temperament and leaving out the predictions about appearance, disease and marriage. Here are all twelve, beside the Saravali slokas for the same sign:

This calculator does not print that line; it stays with the measurement. The line appears in the temperament section of the signed-in Kundali page and in the Life Blueprint, both of which read the same Sun.

How this page computes your Sun, step by step

The method sections above describe the calculation in outline. Here is each step with the numbers the engine produced for the sample: 14 August 1994, no birth time, no birth place.

1. 1.Fix the instant. With no time the engine uses 12:00 on the birth date; with no place and no time zone it assumes India Standard Time and says so in the result (timezoneAssumed: true). Noon IST on 14 August 1994 is 06:30 UTC.
2. 2.Convert to a Julian Day, a continuous count of days: 2449578.7708. In centuries measured from noon on 1 January 2000 that is -0.05383242.
3. 3.Compute the mean Sun. The mean longitude comes to 142.4579 degrees and the mean anomaly, the Sun's place in its yearly cycle of speeding up and slowing down, to 219.6131 degrees.
4. 4.Correct for the orbit. The three-term correction on the anomaly is -1.2015 degrees, which gives a true longitude of 141.2564.
5. 5.Convert to the apparent longitude, the direction in which the Sun is actually seen: a further -0.0021 degrees, giving 141.2543. That is 21.25 degrees into Leo in the tropical zodiac.
6. 6.Subtract the Lahiri ayanamsa for the same instant, 23.7779 degrees: the sidereal longitude is 117.4764.
7. 7.Cut by signs. 117.4764 divided by 30 is 3.92; the whole part, 3, is the fourth sign counted from Aries at 0, which is Cancer (Karka). The remainder rounds to 27.48 degrees.
8. 8.Cut by nakshatras. 117.4764 divided by 13 degrees 20 minutes is 8.81; the whole part, 8, is Ashlesha, the ninth nakshatra counted from Ashwini at 0, and the ninth entry in the engine's lord cycle (Ketu, Venus, Sun, Moon, Mars, Rahu, Jupiter, Saturn, Mercury) is Mercury. The fraction, 0.81, times four is 3.24; dropping the fraction and adding one gives pada 4.

The Sun itself carries no combustion flag, but it is what every other graha's flag is measured from. The engine marks a graha combust when it is within a set distance of the Sun: 12 degrees for the Moon, 17 for Mars, 14 for Mercury (12 when retrograde), 11 for Jupiter, 10 for Venus (8 when retrograde) and 15 for Saturn, limits its code takes from Kannan. In the sample chart Mercury stands at Cancer 28.87, only 1.39 degrees from the Sun, and is marked combust. That is common: on noon charts for every date from 1950 to 2025 Mercury was combust on 41 per cent of dates. The Ashlesha page describes the nakshatra the sample Sun occupies.

With the time 06:42 and Ahmedabad's coordinates, the same date gives a Sun at 117.2643 degrees - Cancer 27.26, still Ashlesha pada 4 - and, because the ascendant is Leo at 2.33 degrees, a whole-sign house of 12: Cancer is the twelfth sign counted from Leo. That placement has its own page, the Sun in the 12th house, and so does each of the other houses, for example the 1st and the 10th. The same time without a place returns the same Sun and no house, and the Lagna calculator shows the ascendant the house is counted from.

Reading every field of the result

One display edge is worth knowing. The degree is rounded to two decimals, so for about seven minutes before the Sun enters a new sign the page prints 30.00 next to the old sign. On 17 August 1994 the Sun entered Leo at 03:02 IST, and from 02:54:45 until then the result read "Cancer, 30.00". Read 30.00 as the last minutes of the sign named beside it.

Without a birth time: steady on most dates, moved on some

When no time is given the page reads the Sun at noon and also at 00:00 and 23:59 of your birth date, on the same clock, and compares sign, nakshatra and pada. On the sample date the Sun went from 27.00 to 27.96 degrees of Cancer and stayed in Ashlesha pada 4 throughout, so the note says a birth time would not change the answer. Run through the real handler for every date in 1994, the comparison came out one of five ways:

Across all 27,759 dates from 1950 to 2025 on the IST clock, the sign differed between the two ends on 911 dates (3.28 per cent, twelve a year), the nakshatra on 2,046 (7.37 per cent) and something - usually only the pada - on 8,193 (29.51 per cent). So the Sun sign is settled by the date alone on about 29 dates in 30, where the Moon sign is settled on only a little over half.

The last two rows differ for a geometric reason. Twenty-seven nakshatras do not divide evenly into twelve signs; only the boundaries at 0, 120 and 240 degrees line up, so the Sun changes nakshatra with its sign only when it enters Aries, Leo or Sagittarius - Leo in the table, from Ashlesha to Magha. The other nine sign changes happen inside a nakshatra, between two of its padas.

The solar calendar this engine produces

BPHS Ch. 90 uses the name Sankranti for the Sun's entry into a new rashi. These are the twelve entries this engine computes, found by narrowing each crossing down to the second, for the sample year and for 2026:

The stays are not equal. The Sun spends 31.45 days in Gemini and 29.45 in Sagittarius, because its apparent speed changes through the year - the 0.95 to 1.02 degrees a day measured above. The thirty days the transit reading carries as the Sun's stay in a sign is a round label taken from Kannan, not a measurement. Likewise it spends 13.08 to 13.98 days in each nakshatra and 3.27 to 3.50 in each pada.

Two checks can be made against this table. The project's rules document lists the sidereal Sun's entry into Aries on about 14 April as a validation anchor; the engine gives 13 April 1950 at 21:36 IST, 14 April 1994 at 04:14 and 14 April 2026 at 09:11. And the average interval between Aries entries from 1950 to 2025 is 365.25637 days. Because that is a little longer than the 365.25-day average of the civil calendar, every entry in the 2026 column falls about five hours later than in the 1994 column. The methodology page sets out what the engine does and does not claim.

The table also shows why the page's tagline says "often one sign earlier". In 2026 the tropical zodiac puts the Sun into Aries on 20 March at 20:07 IST and into Taurus on 20 April at 06:59. The sidereal Sun enters Aries on 14 April at 09:11, so the two zodiacs agree on Aries for under six days, from 14 to 20 April; for the rest of the tropical month of Aries the sidereal Sun is still in Pisces. Counted at noon IST over every date from 1950 to 2025, the two signs were the same on 21.06 per cent of dates and the sidereal sign was one behind on the other 78.94 per cent - never two behind, never ahead. The window of agreement is shrinking as the ayanamsa grows: 82 days in 1950, 77 in 1994, 70 in 2025.

Time, place and clock: how much each one moves the answer

The Sun moves about 0.04 of a degree an hour, so reading it at noon instead of at the true birth time is never more than half a degree out. For the sample, the 06:42 birth gives Cancer 27.26 and noon gives 27.48. That half-degree matters on one kind of date only: the day the Sun changes sign.

Take 17 October 1994, when this engine has the Sun entering Libra at 14:53 IST. With no time, the noon reading is Virgo 29.88 and the note names both signs. A 14:00 birth is Virgo 29.96; a 16:00 birth is Libra 0.05. And with London picked as the birth place and still no time, noon is read on British Summer Time, which is 16:30 in India, and the result is Libra 0.07. Same date, same "noon", a different sign purely because of the clock - and here the difference is between a neutral sign and the Sun's sign of debilitation. This is why the engine reads the IANA time zone for the birth date rather than a fixed offset.

Even with an exact time there is a margin. The engine's header puts its Sun within about 0.01 degree, which the Sun covers in roughly fifteen minutes, so a birth within a quarter of an hour of an entry time in the table above should be treated as on the line. The ayanamsa is the larger unknown. This app uses one straight-line Lahiri formula - 23.1551 degrees at the start of 1950, 23.8531 at the start of 2000, 24.2266 at noon IST on 5 October 2026 - and a program that subtracts a different figure moves every entry by about two and a half hours for each tenth of a degree of difference. The Ayanamsa calculator shows the value for any date, why apps disagree works through the causes, and what an unknown birth time costs covers the rest of the chart.

Solar yogas: counting from the Sun's sign

Both primary texts define three yogas by the signs next to the Sun. BPHS Ch. 38 Sl. 1 and Saravali Ch. 14 Sl. 1 agree on the geometry: leaving out the Moon, a graha in the 2nd sign from the Sun forms Vesi, a graha in the 12th forms Vasi (BPHS spells it Vosi), and grahas on both sides form Ubhayachari. The engine tests exactly that, by whole signs, for Mars, Mercury, Jupiter, Venus and Saturn.

On the effects the two texts part ways. For Vesi, BPHS Sl. 2-3 reads an even-sighted, truthful, indolent and happy person of little wealth, while Saravali Sl. 2 reads someone weak-sighted, firm in his word and hard-working. BPHS Sl. 4 then adds one general condition - benefics forming these yogas give the stated effects and malefics the contrary - where Saravali Sl. 3-5 and 7-9 give a separate reading for each graha that forms the yoga. This app shows one curated line per yoga and follows Saravali's reading for it.

In the sample chart Mars is in Gemini, the 12th sign from the Sun's Cancer, and nothing is in Leo, so the Yogas calculator returns Vasi Yoga: "The 12th sign from your Sun holds Mars", read as "strong, persuasive speech and a dependable, well-regarded presence". By BPHS Sl. 4 a malefic forming it would turn that reading round; by Saravali Sl. 7-9 Mars forming Vasi is read favourably. The app does not adjudicate. Nor are these yogas rare: on noon charts for every date from 1950 to 2025, 27.23 per cent had Vesi, 27.82 per cent Vasi, 34.51 per cent Ubhayachari and only 10.43 per cent none, because Mercury and Venus are never far from the Sun. What a yoga in your chart means explains how to weigh a yoga this common. Although only signs are involved, the calculator runs with a birth time and place, because the engine's yoga detector as a whole needs an ascendant.

Where your Sun is used next

• Moon Phase measures the tithi as the Moon's distance ahead of the Sun. On the sample date that distance was 90.28 degrees, the eighth tithi of the bright half.
• Varshaphal casts the annual chart for the moment the Sun returns to the exact sidereal longitude it held at birth - the longitude field on this page - found by repeated halving to under a second of time. It needs a birth time and place.
• Shad Bala uses the Sun twice: for its own strength, where it is counted strong in a daytime birth and gets full directional strength in the 10th house, and to decide day or night for every other graha, by testing whether the Sun was above the sunrise line at the birth place.
• Vimshottari Dasha gives the Sun a period of six years (BPHS Ch. 46 Sl. 15). When it runs is decided by the Moon's nakshatra, not by the Sun's sign, but how it is read is: BPHS Ch. 47 Sl. 7-15 reads the Sun's dasha as favourable when he is in his own or exaltation sign or an angle and as difficult when he is debilitated or in the 6th, 8th or 12th. The Sun's mahadasha has its own page.
• Gochar counts today's Sun from your natal Moon sign. In the engine's rule, taken from Kannan, the transiting Sun is favourable in the 2nd, 3rd, 6th and 11th from the Moon, testing in the 1st, 4th, 8th and 12th, and unremarked elsewhere, with the 5th flagged as an intensified position. At noon IST on 5 October 2026 the Sun is at Virgo 17.81, the 12th from the sample's Libra Moon.
• Daily guidance carries today's Sun sign and the house it falls in, counted from your ascendant or, without a birth time, from your natal Moon. Its energy score follows the Moon's house, not the Sun's.
• Navamsa (D9) places the Sun in a ninth-part sign. Each navamsa is the same stretch of sky as one pada, so the pada here already names it: the sample Sun in Ashlesha pada 4 is in the Pisces navamsa. The Navamsa article explains why.
• Ashtakavarga builds the Sun's own chart of benefic points (BPHS Ch. 66), counted from the signs of the seven grahas and the Lagna.
• The free birth chart shows the Sun among all nine grahas, and the Nakshatra calculator reads the birth star, which is the Moon's nakshatra, not the Sun's.

What this page cannot tell you

• It cannot settle your sign if you were born on one of the twelve days a year when the Sun changes sign and you do not know the time. The result names both signs rather than choosing one.
• It does not judge the Sun. Dignity, house, aspects and the yogas around it are what the classical texts use to decide how a Sun sign plays out, and none of them is on this page.
• It does not show the tropical Sun sign used in Western horoscopes. For the sample date that is Leo; the sidereal sign here is Cancer.
• It cannot promise that every other program will agree. A different ayanamsa or a different clock can move a Sun that sits within a fraction of a degree of a boundary.

Questions

Is my Sun sign my rashi?

Not in the sense the word is normally used in India. When a family astrologer or a matching chart asks for your rashi, it means the sign of the Moon. Kundli matching in this app reads each person's Moon sign and Moon nakshatra and does not use the Sun's position at all. Your rashi is not your star sign sets out the difference.

My result says the Sun moved during my birth date. Which sign am I?

Look at the two ends the note names. If both show the same sign, your Sun sign is settled and only its nakshatra or pada depends on the hour. If they show two signs, you were born on an entry day and the answer depends on the time: on 17 October 1994, Virgo before 14:53 IST and Libra after. Enter your birth time and the page reads the Sun at that minute instead of at noon.

I was born on 14 April. Am I Pisces or Aries?

It depends on the year and the hour, because the entry time moves. This engine puts the Sun's entry into Aries at 04:14 IST on 14 April 1994 and at 09:11 IST on 14 April 2026. A birth at 06:00 IST on 14 April is therefore Aries 0.07 in 1994 and Pisces 29.87 in 2026. A fixed list of dates cannot answer this; the calculation for your own year can.

My Sun is in Libra, its sign of debilitation. Is that bad?

It is one classical measure of position, not a verdict on a person. BPHS Ch. 3 Sl. 49-50 puts the Sun's fall in Libra, deepest at 10 degrees, and this app's strength ladder gives a debilitated Sun no position strength. But position is only one of the components the Shad Bala calculator adds up, and the texts read a placement together with its house, its aspects and the condition of the sign's lord. The Sun is in Libra for about thirty days every year, for everyone born in them.

Which matters more, the Sun sign or the Moon sign?

The texts used here do not rank them; BPHS Ch. 3 gives the Sun the soul and the Moon the mind. In practice this app leans on the Moon for more: matching, the dasha sequence, Sade Sati and the transit reading are all counted from the Moon. The Sun supplies the solar yogas, combustion, the tithi, day or night and the annual chart.

Another Indian app shows a different Sun sign. Which one is right?

Check the degree first. If your Sun is within a degree or so of 0 or 30, the difference can come from the ayanamsa, the time zone or a noon assumption, and both programs may be computing correctly from different settings. If it is far from an edge, check that the other program is showing a sidereal sign and not the tropical one. Why apps disagree goes through each cause.

Can I use the nakshatra lord shown here for my dasha?

No. The lord comes from the same nine-lord cycle, but the Vimshottari sequence starts from the nakshatra of the Moon. The sample Sun is in Ashlesha, whose lord is Mercury, while the sample Moon at noon is in Vishakha, so that life opens in Jupiter's period, not Mercury's. The Timing feature and the Vimshottari Dasha calculator both read the Moon.