About HIP 97923
HIP 97923 is an uncommon variable star. It sits in the constellation Sgr, shines at apparent magnitude 10.31 and has spectral type F5.
Its spectrum reads F5 — an F-type star — a little hotter, whiter and shorter-lived than the Sun.
Uncommon variable star 32 EP
HIP 97923
RA 298.5079° · Dec -30.2529° · star
Score breakdown
· 6 badgesUncommon 34 pts → Rare
- Strongly variable +10
- Toward the galactic centre +8
- Variable star +5
- On the zodiac +3
- Yellow-white F-type star +3
- A named variable star +3
Total score 32
2 more points to reach Rare.
Badges
- Variable star · +5
- Toward the galactic centre · +8
- On the zodiac · +3
- Yellow-white F-type star · +3
- Strongly variable · +10
- A named variable star · +3
Trivia
Hard to believe
- True brightness. It pours out about 642.7 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 F5 — an F-type star — a little hotter, whiter and shorter-lived 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 10.3 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 July — that's when to go looking.
Its true colour
- Its true colour. Measured through blue and visual filters it comes out yellow-white (B−V 0.4) — a shade brighter and crisper than our own Sun.
- Why no green stars. No star ever looks green: a surface hot enough to peak in green also floods out plenty of red and blue, and your eye blends the mixture back to white.
Properties
- absmag
- -9.69
- bv
- 0.443
- constellation
- Sgr
- luminosity
- 654636.1741
- mag
- 10.31
- name
- HIP 97923
- spect
- F5
- var amplitude
- 0.64
- var designation
- V4424
- var max
- 9.944
- var min
- 10.584
How to see it
Look for HIP 97923 in the constellation Sgr. At apparent magnitude 10.31, a small backyard telescope will bring it into view.
Like any astronomical target, HIP 97923 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 97923 is an uncommon variable star
HIP 97923 scores 32 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 2 points would lift it into a rarer tier.
That score comes from 6 science badges — Variable star, Toward the galactic centre, On the zodiac, Yellow-white F-type 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.