About HD 25140
HD 25140 is an uncommon star. It sits in the constellation Cam, shines at apparent magnitude 8.14 and has spectral type G0II.
Its spectrum reads G0II — a G-type star: the very same spectral class as our own Sun.
Uncommon star 27 EP
HD 25140
RA 60.7202° · Dec 58.9245° · star
Score breakdown
· 4 badgesUncommon 34 pts → Rare
- Bright giant +12
- Sun-like G-type star +8
- Never sets (northern circumpolar) +4
- Star +3
Total score 27
7 more points to reach Rare.
Badges
- Star · +3
- Never sets (northern circumpolar) · +4
- Sun-like G-type star · +8
- Bright giant · +12
Trivia
Hard to believe
- True brightness. It pours out about 4.7 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 G0II — a G-type star: the very same spectral class as our own Sun.
- Where it is in life. It is a bright giant, well on its way to the largest stars there are.
Find it in the sky
- How to spot it. At magnitude 8.1 it is just past naked-eye reach — ordinary binoculars will pull it in, over in Camelopardalis.
- Northern sky. It rides the northern half of the sky — an easier target the further north you are.
- Best time of year. It stands highest in the middle of the night around November — that's when to go looking.
Its true colour
- Its true colour. Measured through blue and visual filters it comes out orange (B−V 1.4) — cooler than the Sun, and the kind of star that burns steadily for tens of billions of years.
By the numbers
- Surface temperature. Its colour puts the surface at roughly 4020 K, against the Sun's 5778 K.
Properties
- absmag
- -11.86
- bv
- 1.36
- constellation
- Cam
- luminosity
- 4830588.0204
- mag
- 8.14
- name
- HD 25140
- spect
- G0II
How to see it
Look for HD 25140 in the constellation Cam. At apparent magnitude 8.14, it is an easy target for binoculars.
Like any astronomical target, HD 25140 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 HD 25140 is an uncommon star
HD 25140 scores 27 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 7 points would lift it into a rarer tier.
That score comes from 4 science badges — Star, Never sets (northern circumpolar), Sun-like G-type star and Bright giant — 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.