COSMOS / CONSTELLATIONS / TAU
Taurus (Bull)
The Bull. IAU abbreviation Tau. One of the 48 classical constellations listed by Ptolemy in the Almagest in the 2nd century AD.
STAR CHART
KEY FACTS
- IAU abbreviation
- Tau
- Latin name / genitive
- Taurus / Tauri
- Position
- Right ascension ≈ 4 h 31 m; declination −1° to +30°
- Visibility from Türkiye
- Visible in full from anywhere in Türkiye. When it crosses the meridian its centre stands about 65° above the horizon from Ankara.
- Best time to observe
- Best placed at 21:00 Türkiye time around 25 January.
- Number of stars
- 225 stars brighter than magnitude 6.5 in the catalogue; 49 brighter than 5 and 16 brighter than 4.
INTERACTIVE LAB
Where is Taurus tonight?
The lab opens for Ankara on today’s date. Drag the time slider through the night; the “Best night” button jumps to the date when the constellation is highest at 21:00 (around 25 January). Change the city to compare the view from elsewhere in Türkiye and around the world.
MYTH, HISTORY AND OBSERVING
The bull whose form Zeus took to carry off Europa. The orange giant Aldebaran stands in front of the V-shaped Hyades cluster but is only half as far away. The Pleiades (M45) and the Crab Nebula (M1), remnant of the supernova recorded by Chinese and Arab astronomers in 1054, are here.
BRIGHTEST STARS
| Star | Magnitude | Distance (light-years) | Spectral type |
|---|---|---|---|
| Aldebaran | 0.87 | 67 | K5III |
| Elnath | 1.65 | 134 | B7III |
| Alcyone | 2.85 | 403 | B7III |
| Tianguan | 2.97 | 445 | B4IIIp |
| Chamukuy | 3.40 | 150 | A7III |
| λ Tau | 3.41 | 484 | B3V |
| Ain | 3.53 | 147 | K0III |
| ο Tau | 3.61 | 291 | G8III |
Magnitude: apparent brightness; the smaller the number, the brighter the star. Distances derive from parallax measurements and are uncertain for distant stars. Source: HYG v4.1 star catalogue (CC BY-SA 4.0).
SOURCES
Position, visibility and best observing time were computed approximately for this page from the catalogue stars (Ankara, 39.9° N). The 88 constellations were adopted by the IAU in 1922; their boundaries were drawn by Eugène Delporte in 1930.