About HIP 21776
HIP 21776 is a trash star. It lies about 331.5 light-years from Earth, sits in the constellation Tau and shines at apparent magnitude 12.6.
Its colour puts the surface at roughly 10380 K, against the Sun's 5778 K.
Trash star 11 EP
HIP 21776
RA 70.1639° · Dec 8.6793° · star
Score breakdown
· 3 badgesTrash 15 pts → Common
- Blue-white star +5
- Star +3
- On the zodiac +3
Total score 11
4 more points to reach Common.
Badges
- Star · +3
- On the zodiac · +3
- Blue-white star · +5
Trivia
Sense of scale
- In perspective. Far away by human standards, yet still a local address inside the Milky Way's spiral arms.
Find it in the sky
- How to spot it. At magnitude 12.6 it is far too faint for the eye: this one belongs to cameras and long exposures, over in Taurus.
- Seen from everywhere. It sits almost on the celestial equator, so it can be seen from essentially anywhere on Earth.
- Best time of year. It stands highest in the middle of the night around November — that's when to go looking.
Could we get there?
- Verdict. Hopelessly far for any craft humanity can build today.
Getting there
- Aboard Voyager 1. ≈ 5.8 million years at Voyager 1's speed (17 km/s).
- Fastest probe ever. ≈ 517.5 thousand years even at the Parker Solar Probe's 192 km/s.
- At 10% light speed. ≈ 3315 years in a starship at a tenth of light speed.
Properties
- absmag
- 7.565
- bv
- -0.02
- constellation
- Tau
- dist ly
- 331.4593
- luminosity
- 0.082
- mag
- 12.6
- name
- HIP 21776
How to see it
Look for HIP 21776 in the constellation Tau. At apparent magnitude 12.6, it takes a larger telescope or a long-exposure image to capture.
Like any astronomical target, HIP 21776 is best seen from a dark site away from city lights, and when it is above the horizon depends on your latitude and the time of year. The visibility panel above works out tonight's viewing window for your saved location.
Why HIP 21776 is a trash star
HIP 21776 scores 11 points on Spacedle's rarity scale, which places it in the trash tier. Another 4 points would lift it into a rarer tier.
That score comes from 3 science badges — Star, On the zodiac and Blue-white star — each earned for a real, measurable property of the object. Rarity on Spacedle is never random: the more remarkable an object's astrophysics, the more badges it collects, the higher it scores, and the rarer it ranks.