About HIP 115925
HIP 115925 is an epic variable star. It sits in the constellation Cas, shines at apparent magnitude 11.63 and has spectral type G1IB.
Its spectrum reads G1IB — a G-type star: the very same spectral class as our own Sun.
Epic variable star 56 EP
HIP 115925
RA 352.3032° · Dec 63.3743° · star
Score breakdown
· 7 badgesEpic 78 pts → Anomaly
- Supergiant +18
- Strongly variable +10
- Sun-like G-type star +8
- Deep red star +8
- Variable star +5
- Never sets (northern circumpolar) +4
- A named variable star +3
Total score 56
22 more points to reach Anomaly.
Badges
- Variable star · +5
- Never sets (northern circumpolar) · +4
- Sun-like G-type star · +8
- Supergiant · +18
- Deep red star · +8
- Strongly variable · +10
- A named variable star · +3
Trivia
Hard to believe
- True brightness. It pours out about 190.5 thousand 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 G1IB — a G-type star: the very same spectral class as our own Sun.
- Where it is in life. It is a supergiant, hundreds of times wider than the 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 11.6 you'll want a small backyard telescope, 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 September — 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 1.8) — one of the coolest surfaces a star can have while still fusing.
Properties
- absmag
- -8.37
- bv
- 1.82
- constellation
- Cas
- luminosity
- 194088.5878
- mag
- 11.63
- name
- HIP 115925
- spect
- G1IB
- var amplitude
- 1.18
- var designation
- CY
- var max
- 10.998
- var min
- 12.178
How to see it
Look for HIP 115925 in the constellation Cas. At apparent magnitude 11.63, a small backyard telescope will bring it into view.
Like any astronomical target, HIP 115925 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 115925 is an epic variable star
HIP 115925 scores 56 points on Spacedle's rarity scale, which places it in the epic tier. Another 22 points would lift it into a rarer tier.
That score comes from 7 science badges — Variable star, Never sets (northern circumpolar), Sun-like G-type star, Supergiant, 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.