← Back to dex
Uncommon star 27 EP

HD 101740

RA 175.7030° · Dec 49.9590° · star

Loading sky survey…
🌌 View in 3D star map
Tonight’s visibility

Computing the sky for your location…

Score breakdown

· 5 badges
27 pts · Uncommon
Uncommon 34 pts → Rare
  • Sun-like G-type star +8
  • Distant (over 1,000 light-years) +6
  • Giant star +6
  • Never sets (northern circumpolar) +4
  • Star +3
Total score 27

7 more points to reach Rare.

Badges

  • Star · +3
  • Distant (over 1,000 light-years) · +6
  • Never sets (northern circumpolar) · +4
  • Sun-like G-type star · +8
  • Giant star · +6

Trivia

What it actually is

  • Spectral class. Its spectrum reads G9III — a G-type star: the very same spectral class as our own Sun.
  • Where it is in life. It is a giant. It has already exhausted its core hydrogen and swollen up enormously in response.

Sense of scale

  • In perspective. Far away by human standards, yet still a local address inside the Milky Way's spiral arms.

Find it in the sky

  • How to spot it. At magnitude 8.2 it is just past naked-eye reach — ordinary binoculars will pull it in, over in Ursa Major.
  • 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 March — that's when to go looking.

Could we get there?

  • Verdict. Impossible with our current technology — and the next millennium of it.

Getting there

  • Aboard Voyager 1. ≈ 36 million years at Voyager 1's speed (17 km/s).

Properties

absmag
-0.743
bv
0.971
constellation
UMa
dist ly
2051.2955
luminosity
172.6633
mag
8.25
name
HD 101740
spect
G9III

About HD 101740

HD 101740 is an uncommon star. It lies about 2,051.3 light-years from Earth, sits in the constellation UMa, shines at apparent magnitude 8.25 and has spectral type G9III.

Its spectrum reads G9III — a G-type star: the very same spectral class as our own Sun.

How to see it

Look for HD 101740 in the constellation UMa. At apparent magnitude 8.25, it is an easy target for binoculars.

Like any astronomical target, HD 101740 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 101740 is an uncommon star

HD 101740 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 5 science badges — Star, Distant (over 1,000 light-years), Never sets (northern circumpolar), Sun-like G-type star and Giant 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.