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Common exoplanet 17 EP

HD 145377 b

RA 242.9020° · Dec -27.0781° · exoplanet

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Score breakdown

· 3 badges
17 pts · Common
Common 22 pts → Uncommon
  • Orbits a Sun-like star +8
  • Confirmed exoplanet +5
  • Gas giant +4
Total score 17

5 more points to reach Uncommon.

Badges

  • Confirmed exoplanet · +5
  • Gas giant · +4
  • Orbits a Sun-like star · +8

Trivia

What it actually is

  • What it is made of. Its density says rock, though lighter than Earth's mix: probably less iron, or a thick shell of water and ice over the top.

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 9.2 you'll want a small backyard telescope.
  • 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.

Could we get there?

  • Verdict. Hopelessly far for any craft humanity can build today.

Getting there

  • Aboard Voyager 1. ≈ 3.1 million years at Voyager 1's speed (17 km/s).
  • Fastest probe ever. ≈ 272.4 thousand years even at the Parker Solar Probe's 192 km/s.

Properties

density gcc
5.01
diameter km
163279.36
discovery facility
La Silla Observatory
discovery method
Radial Velocity
discovery year
2008
dist ly
174.4556
eccentricity
0.31
eq temp k
442.98
host star teff
6014
insolation
7.7037
mag
9.236
mass earth
1913.3366
name
HD 145377 b
orbital period days
103.95
radius earth
12.8
semi major au
0.45
spect
G3 V
sys num planets
1
sys num stars
1

About HD 145377 b

HD 145377 b is a common exoplanet. It lies about 174.5 light-years from Earth, shines at apparent magnitude 9.24, has spectral type G3 V and has an equilibrium temperature near 443 K.

Its density says rock, though lighter than Earth's mix: probably less iron, or a thick shell of water and ice over the top.

How to see it

At apparent magnitude 9.24, a small backyard telescope will bring it into view.

Like any astronomical target, HD 145377 b 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 145377 b is a common exoplanet

HD 145377 b scores 17 points on Spacedle's rarity scale, which places it in the common tier. Another 5 points would lift it into a rarer tier.

That score comes from 3 science badges — Confirmed exoplanet, Gas giant and Orbits a Sun-like 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.