About HIP 91366
HIP 91366 is a rare variable star. It sits in the constellation Sct, shines at apparent magnitude 9.49 and has spectral type G1.
Its spectrum reads G1 — a G-type star: the very same spectral class as our own Sun.
Rare variable star 34 EP
HIP 91366
RA 279.5138° · Dec -8.3689° · star
Score breakdown
· 5 badgesRare 50 pts → Epic
- Strongly variable +10
- Sun-like G-type star +8
- Deep red star +8
- Variable star +5
- A named variable star +3
Total score 34
16 more points to reach Epic.
Badges
- Variable star · +5
- Sun-like G-type star · +8
- Deep red star · +8
- Strongly variable · +10
- A named variable star · +3
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.
What it actually is
- Spectral class. Its spectrum reads G1 — a G-type star: the very same spectral class as our own Sun.
- It changes. This star does not hold still: its brightness rises and falls on a rhythm of hours, days or years, either pulsing in size or being eclipsed by a companion.
Find it in the sky
- How to spot it. At magnitude 9.5 you'll want a small backyard telescope, over in Scutum.
- 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 1.5) — one of the coolest surfaces a star can have while still fusing.
By the numbers
- Surface temperature. Its colour puts the surface at roughly 3790 K, against the Sun's 5778 K.
Properties
- absmag
- -10.51
- bv
- 1.5
- constellation
- Sct
- luminosity
- 1393156.8029
- mag
- 9.49
- name
- HIP 91366
- spect
- G1
- var amplitude
- 0.59
- var designation
- Y
- var max
- 9.363
- var min
- 9.953
Nearby objects
How to see it
Look for HIP 91366 in the constellation Sct. At apparent magnitude 9.49, a small backyard telescope will bring it into view.
Like any astronomical target, HIP 91366 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 91366 is a rare variable star
HIP 91366 scores 34 points on Spacedle's rarity scale, which places it in the rare tier. Another 16 points would lift it into a rarer tier.
That score comes from 5 science badges — Variable star, Sun-like G-type star, Deep red star, Strongly variable and A named variable 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.