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Common exoplanet 15 EP

BD+20 274 b

RA 25.9203° · Dec 21.0053° · exoplanet

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Score breakdown

· 3 badges
15 pts · Common
Common 22 pts → Uncommon
  • Distant (over 1,000 light-years) +6
  • Confirmed exoplanet +5
  • Gas giant +4
Total score 15

7 more points to reach Uncommon.

Badges

  • Confirmed exoplanet · +5
  • Distant (over 1,000 light-years) · +6
  • Gas giant · +4

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 9.4 you'll want a small backyard telescope.
  • 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 October — 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. ≈ 75.8 million years at Voyager 1's speed (17 km/s).
  • Fastest probe ever. ≈ 6.7 million years even at the Parker Solar Probe's 192 km/s.

Properties

density gcc
3.34
diameter km
165830.6
discovery facility
McDonald Observatory
discovery method
Radial Velocity
discovery year
2012
dist ly
4313.4457
eccentricity
0.21
eq temp k
755.7
host star teff
4296
insolation
53.9651
mag
9.367
mass earth
1334.886
name
BD+20 274 b
orbital period days
578.2
radius earth
13
semi major au
1.3
spect
K5 III
sys num planets
1
sys num stars
1

About BD+20 274 b

BD+20 274 b is a common exoplanet. It lies about 4,313.4 light-years from Earth, shines at apparent magnitude 9.37, has spectral type K5 III and has an equilibrium temperature near 756 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 9.37, a small backyard telescope will bring it into view.

Like any astronomical target, BD+20 274 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 BD+20 274 b is a common exoplanet

BD+20 274 b scores 15 points on Spacedle's rarity scale, which places it in the common tier. Another 7 points would lift it into a rarer tier.

That score comes from 3 science badges — Confirmed exoplanet, Distant (over 1,000 light-years) and Gas 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.