About HD 129070
HD 129070 is a trash star. It sits in the constellation Lup, shines at apparent magnitude 7.36 and has spectral type F5V.
Its spectrum reads F5V — an F-type star — a little hotter, whiter and shorter-lived than the Sun.
Trash star 13 EP
HD 129070
RA 220.5103° · Dec -46.2979° · star
Score breakdown
· 4 badgesTrash 15 pts → Common
- Blue-white star +5
- Star +3
- Yellow-white F-type star +3
- Main-sequence star +2
Total score 13
2 more points to reach Common.
Badges
- Star · +3
- Yellow-white F-type star · +3
- Main-sequence star · +2
- Blue-white star · +5
Trivia
What it actually is
- Spectral class. Its spectrum reads F5V — an F-type star — a little hotter, whiter and shorter-lived than the Sun.
- Where it is in life. It is on the main sequence, quietly fusing hydrogen in its core exactly as the Sun does.
Find it in the sky
- How to spot it. At magnitude 7.4 it is just past naked-eye reach — ordinary binoculars will pull it in, over in Lupus.
- 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 May — that's when to go looking.
Its true colour
- Its true colour. Measured through blue and visual filters it comes out blue-white (B−V -0) — the hallmark of a surface far hotter than the Sun's.
- 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 10320 K, against the Sun's 5778 K.
Properties
- absmag
- -12.64
- bv
- -0.015
- constellation
- Lup
- luminosity
- 9908319.4489
- mag
- 7.36
- name
- HD 129070
- spect
- F5V
How to see it
Look for HD 129070 in the constellation Lup. At apparent magnitude 7.36, it is an easy target for binoculars.
Like any astronomical target, HD 129070 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 129070 is a trash star
HD 129070 scores 13 points on Spacedle's rarity scale, which places it in the trash tier. Another 2 points would lift it into a rarer tier.
That score comes from 4 science badges — Star, Yellow-white F-type star, Main-sequence star and Blue-white 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.