True Sky Astrology
Your sign in the constellations as they really are in the sky
Find your True Sky sign
Without a time we use midday. The Moon moves about 13° a day, so for the Moon — or a Sun close to a border — use the Natal Chart with your birthplace for an exact result.
For your whole chart in True Sky, choose “True Sky” as the zodiac in the Natal Chart →
What is True Sky astrology?
True Sky astrology places the Sun, Moon and planets in the constellations they are actually in when you look up at the sky. Instead of twelve equal 30° signs, it uses the real constellations along the Sun’s path, with the official borders set by the International Astronomical Union.
Because the constellations are different sizes, the signs are too: Virgo spans about 44°, while Scorpius covers under 7°. And the Sun’s path also crosses a thirteenth constellation, Ophiuchus the Serpent Bearer, from late November to mid-December.
Like Vedic (sidereal) astrology, True Sky follows the stars rather than the seasons, so most people’s True Sky sign is one sign earlier than their Western (tropical) sign. None of these systems is “wrong” — they answer different questions, and many people enjoy comparing all three.
Three ways to divide the sky
| Tropical | Sidereal | True Sky | |
|---|---|---|---|
| Based on | The seasons (equinoxes) | The fixed stars | The actual constellations |
| Signs | 12 | 12 | 13 (adds Ophiuchus) |
| Sign sizes | All 30° | All 30° | 6.6° to 44° |
| Used in | Western astrology | Vedic (Jyotish) astrology | Astronomical / “13-sign” astrology |
When the Sun is in each constellation (2026)
| Constellation | Size | Sun enters |
|---|---|---|
| ♈︎Aries | 24.7° | Apr 19 |
| ♉︎Taurus | 36.7° | May 14 |
| ♊︎Gemini | 27.8° | Jun 21 |
| ♋︎Cancer | 20.1° | Jul 21 |
| ♌︎Leo | 35.8° | Aug 11 |
| ♍︎Virgo | 43.9° | Sep 17 |
| ♎︎Libra | 23.3° | Oct 31 |
| ♏︎Scorpius | 6.6° | Nov 23 |
| ⛎︎Ophiuchus | 18.6° | Nov 30 |
| ♐︎Sagittarius | 33.4° | Dec 18 |
| ♑︎Capricornus | 27.8° | Jan 20 |
| ♒︎Aquarius | 24.2° | Feb 16 |
| ♓︎Pisces | 37.0° | Mar 12 |
Dates can shift by a day between years. Borders: IAU constellation boundaries where they cross the ecliptic.