About HIP 8913
HIP 8913 is a common star. It sits in the constellation Cas and shines at apparent magnitude 8.91.
Its colour puts the surface at roughly 3870 K, against the Sun's 5778 K.
Common star 15 EP
HIP 8913
RA 28.6805° · Dec 72.0939° · star
Score breakdown
· 3 badgesCommon 22 pts → Uncommon
- Deep red star +8
- Never sets (northern circumpolar) +4
- Star +3
Total score 15
7 more points to reach Uncommon.
Badges
- Star · +3
- Never sets (northern circumpolar) · +4
- Deep red star · +8
Trivia
Hard to believe
- True brightness. It pours out about 2.3 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 8.9 it is just past naked-eye reach — ordinary binoculars will pull it in, over in Cassiopeia.
- Never sets. So far north that from Britain, Canada or northern Europe it never dips below the horizon — it is up every clear night of the year.
- Best time of year. It stands highest in the middle of the night around October — 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 1.4) — one of the coolest surfaces a star can have while still fusing.
By the numbers
- Surface temperature. Its colour puts the surface at roughly 3870 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
- -11.09
- bv
- 1.448
- constellation
- Cas
- luminosity
- 2376840.2866
- mag
- 8.91
- name
- HIP 8913
How to see it
Look for HIP 8913 in the constellation Cas. At apparent magnitude 8.91, it is an easy target for binoculars.
Like any astronomical target, HIP 8913 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 8913 is a common star
HIP 8913 scores 15 points on Spacedle's rarity scale, which places it in the common tier. Another 7 points would lift it into a rarer tier.
That score comes from 3 science badges — Star, Never sets (northern circumpolar) 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.