About HD 13979
HD 13979 is a trash star. It sits in the constellation For, shines at apparent magnitude 9.17 and has spectral type F:....
Its spectrum reads F:... — an F-type star — a little hotter, whiter and shorter-lived than the Sun.
Trash star 6 EP
HD 13979
RA 33.8369° · Dec -25.9152° · star
Score breakdown
· 2 badgesTrash 15 pts → Common
- Star +3
- Yellow-white F-type star +3
Total score 6
9 more points to reach Common.
Badges
- Star · +3
- Yellow-white F-type star · +3
Trivia
Hard to believe
- True brightness. It pours out about 1.8 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 F:... — an F-type star — a little hotter, whiter and shorter-lived than the Sun.
Find it in the sky
- How to spot it. At magnitude 9.2 you'll want a small backyard telescope, over in Fornax.
- 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 October — that's when to go looking.
Its true colour
- Its true colour. Measured through blue and visual filters it comes out yellow (B−V 0.6) — almost exactly the Sun's own shade — a stellar twin in colour, if not in size.
- 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.
By the numbers
- Surface temperature. Its colour puts the surface at roughly 5790 K, against the Sun's 5778 K.
Properties
- absmag
- -10.83
- bv
- 0.647
- constellation
- For
- luminosity
- 1870682.1404
- mag
- 9.17
- name
- HD 13979
- spect
- F:...
How to see it
Look for HD 13979 in the constellation For. At apparent magnitude 9.17, a small backyard telescope will bring it into view.
Like any astronomical target, HD 13979 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 13979 is a trash star
HD 13979 scores 6 points on Spacedle's rarity scale, which places it in the trash tier. Another 9 points would lift it into a rarer tier.
That score comes from 2 science badges — Star and Yellow-white F-type 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.