Common exoplanet 15 EP

HD 147873 b

RA 246.4380° · Dec -33.5672° · exoplanet

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Score breakdown

· 3 badges

15 pts · Common

Common 24 pts → Uncommon

Multi-planet system +6
Confirmed exoplanet +5
Gas giant +4

Total score 15

9 more points to reach Uncommon.

Badges

Confirmed exoplanet · +5
Gas giant · +4
Multi-planet system · +6

Trivia

Could we get there?

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

Getting there

Aboard Voyager 1. ≈ 6.3 million years at Voyager 1's speed (17 km/s).
Fastest probe ever. ≈ 555.4 thousand years even at the Parker Solar Probe's 192 km/s.
At 10% light speed. ≈ 3557 years in a starship at a tenth of light speed.
Distance. 356 light-years from Earth.

Look-back time

Look-back time. The light you'd see left around the year 1670.

Saying hello

Say hello. A radio message and its reply would take 711 years round-trip.

Standing on it

A year here. A full year lasts just 117 Earth days.

By the numbers

Size. About 12.8× the width of Earth.
Volume. About 2097 Earths could fit inside it.
Mass. Roughly 1634× Earth's mass — about 5.1 Jupiters.
Your weight. You'd weigh about 10.0× your Earth weight standing here.
Temperature. A scorching 330°C on average.

How we found it

Discovery. Found by Multiple Observatories using the radial velocity method.

Cosmic context

Crowded system. One of at least 2 planets orbiting its star.

Properties

density gcc: 4.28
discovery facility: Multiple Observatories
discovery method: Radial Velocity
dist ly: 355.6894
eccentricity: 0.207
eq temp k: 603.16
insolation: 21.9829
mass earth: 1633.6462
name: HD 147873 b
orbital period days: 116.596
radius earth: 12.8
sys num planets: 2

About HD 147873 b

HD 147873 b is a common exoplanet. It lies about 355.7 light-years from Earth, has an equilibrium temperature near 603 K, spans roughly 12.8 Earth radii and weighs about 1,633.65 Earth masses.

One of at least 2 planets orbiting its star.

How to see it

Like any astronomical target, HD 147873 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 147873 b is a common exoplanet

HD 147873 b scores 15 points on Spacedle's rarity scale, which places it in the common tier. Another 9 points would lift it into a rarer tier.

That score comes from 3 science badges — Confirmed exoplanet, Gas giant and Multi-planet system — 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.