About HIP 73443
HIP 73443 is a common star. It sits in the constellation UMi and shines at apparent magnitude 9.49.
Its colour puts the surface at roughly 3870 K, against the Sun's 5778 K.
Common star 15 EP
HIP 73443
RA 225.1270° · Dec 71.4471° · 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 1.4 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 9.5 you'll want a small backyard telescope, over in Ursa Minor.
- 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 May — 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
- -10.51
- bv
- 1.45
- constellation
- UMi
- luminosity
- 1393156.8029
- mag
- 9.49
- name
- HIP 73443
How to see it
Look for HIP 73443 in the constellation UMi. At apparent magnitude 9.49, a small backyard telescope will bring it into view.
Like any astronomical target, HIP 73443 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 73443 is a common star
HIP 73443 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.