About HIP 90684
HIP 90684 is an uncommon star. It lies about 2,470.9 light-years from Earth, sits in the constellation Sgr and shines at apparent magnitude 10.92.
Its colour puts the surface at roughly 3680 K, against the Sun's 5778 K.
Uncommon star 28 EP
HIP 90684
RA 277.5439° · Dec -19.8516° · star
Score breakdown
· 5 badgesUncommon 34 pts → Rare
- Toward the galactic centre +8
- Deep red star +8
- Distant (over 1,000 light-years) +6
- Star +3
- On the zodiac +3
Total score 28
6 more points to reach Rare.
Badges
- Star · +3
- Distant (over 1,000 light-years) · +6
- Toward the galactic centre · +8
- On the zodiac · +3
- Deep red star · +8
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 10.9 you'll want a small backyard telescope, over in Sagittarius.
- Southern sky. It rides the southern half of the sky — an easier target the further south you are.
- Best time of year. It stands highest in the middle of the night around June — that's when to go looking.
Could we get there?
- Verdict. Impossible with our current technology — and the next millennium of it.
Getting there
- Aboard Voyager 1. ≈ 43.4 million years at Voyager 1's speed (17 km/s).
- Fastest probe ever. ≈ 3.9 million years even at the Parker Solar Probe's 192 km/s.
- At 10% light speed. ≈ 24.7 thousand years in a starship at a tenth of light speed.
Properties
- absmag
- 1.523
- bv
- 1.58
- constellation
- Sgr
- dist ly
- 2470.8789
- luminosity
- 21.419
- mag
- 10.92
- name
- HIP 90684
How to see it
Look for HIP 90684 in the constellation Sgr. At apparent magnitude 10.92, a small backyard telescope will bring it into view.
Like any astronomical target, HIP 90684 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 90684 is an uncommon star
HIP 90684 scores 28 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 6 points would lift it into a rarer tier.
That score comes from 5 science badges — Star, Distant (over 1,000 light-years), Toward the galactic centre, On the zodiac 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.