About HIP 91288
HIP 91288 is a trash star. It sits in the constellation Oph and shines at apparent magnitude 9.74.
Its colour puts the surface at roughly 3480 K, against the Sun's 5778 K.
Trash star 11 EP
HIP 91288
RA 279.3065° · Dec 7.5323° · star
Score breakdown
· 2 badgesTrash 15 pts → Common
- Deep red star +8
- Star +3
Total score 11
4 more points to reach Common.
Badges
- Star · +3
- Deep red star · +8
Trivia
Hard to believe
- True brightness. It pours out about 1.1 million times as much light as the Sun. It only looks ordinary because it is so far away.
Find it in the sky
- How to spot it. At magnitude 9.7 you'll want a small backyard telescope, over in Ophiuchus.
- 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 June — that's when to go looking.
Its true colour
- Its true colour. Measured through blue and visual filters it comes out deep orange-red (B−V 1.7) — one of the coolest surfaces a star can have while still fusing.
By the numbers
- Surface temperature. Its colour puts the surface at roughly 3480 K, against the Sun's 5778 K.
What's in a name
- Its catalogue. The HIP number comes from Hipparcos, the ESA satellite that between 1989 and 1993 pinned down 118,000 stars precisely enough to triangulate their distances.
Properties
- absmag
- -10.26
- bv
- 1.73
- constellation
- Oph
- luminosity
- 1106623.784
- mag
- 9.74
- name
- HIP 91288
How to see it
Look for HIP 91288 in the constellation Oph. At apparent magnitude 9.74, a small backyard telescope will bring it into view.
Like any astronomical target, HIP 91288 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 91288 is a trash star
HIP 91288 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 2 science badges — Star and Deep red 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.