About HD 164513
HD 164513 is an uncommon star. It sits in the constellation Sgr, shines at apparent magnitude 8.42 and has spectral type F5II.
Its spectrum reads F5II — an F-type star — a little hotter, whiter and shorter-lived than the Sun.
Uncommon star 29 EP
HD 164513
RA 270.5442° · Dec -16.2253° · star
Score breakdown
· 5 badgesUncommon 34 pts → Rare
- Bright giant +12
- Toward the galactic centre +8
- Star +3
- On the zodiac +3
- Yellow-white F-type star +3
Total score 29
5 more points to reach Rare.
Badges
- Star · +3
- Toward the galactic centre · +8
- On the zodiac · +3
- Yellow-white F-type star · +3
- Bright giant · +12
Trivia
Hard to believe
- True brightness. It pours out about 3.7 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 F5II — an F-type star — a little hotter, whiter and shorter-lived than the 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 8.4 it is just past naked-eye reach — ordinary binoculars will pull it in, 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 June — that's when to go looking.
Its true colour
- Its true colour. Measured through blue and visual filters it comes out orange (B−V 1.2) — 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 4250 K, against the Sun's 5778 K.
Properties
- absmag
- -11.58
- bv
- 1.228
- constellation
- Sgr
- luminosity
- 3732501.578
- mag
- 8.42
- name
- HD 164513
- spect
- F5II
How to see it
Look for HD 164513 in the constellation Sgr. At apparent magnitude 8.42, it is an easy target for binoculars.
Like any astronomical target, HD 164513 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 164513 is an uncommon star
HD 164513 scores 29 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 5 points would lift it into a rarer tier.
That score comes from 5 science badges — Star, Toward the galactic centre, On the zodiac, Yellow-white F-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.