Uncommon exoplanet 29 EP

PSR B1257+12 d

RA 195.0149° · Dec 12.6824° · exoplanet

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Score breakdown

· 4 badges

29 pts · Uncommon

Uncommon 33 pts → Rare

Distant (>1000 ly) +10
Super-Earth +8
Multi-planet system +6
Confirmed exoplanet +5

Total score 29

4 more points to reach Rare.

Badges

Confirmed exoplanet · +5
Super-Earth · +8
Multi-planet system · +6
Distant (>1000 ly) · +10

Trivia

Could we get there?

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

Getting there

Aboard Voyager 1. ≈ 34.4 million years at Voyager 1's speed (17 km/s).
Fastest probe ever. ≈ 3.1 million years even at the Parker Solar Probe's 192 km/s.
At 10% light speed. ≈ 19.6 thousand years in a starship at a tenth of light speed.
Distance. 1957 light-years from Earth.

Look-back time

Look-back time. The light you'd see left around the year 69.

Saying hello

Say hello. A radio message and its reply would take 3914 years round-trip.

Standing on it

A year here. A full year lasts just 98.2 Earth days.

By the numbers

Size. About 1.8× the width of Earth.
Volume. About 5.8 Earths could fit inside it.
Mass. About 3.9× the mass of Earth.
Your weight. You'd weigh about 1.2× your Earth weight standing here.

How we found it

Discovery. Found by Arecibo Observatory using the pulsar timing method.

Cosmic context

Crowded system. One of at least 3 planets orbiting its star.

Properties

density gcc: 3.67
discovery facility: Arecibo Observatory
discovery method: Pulsar Timing
dist ly: 1956.936
eccentricity: 0.0264
mass earth: 3.9
name: PSR B1257+12 d
orbital period days: 98.2114
radius earth: 1.8
sys num planets: 3

About PSR B1257+12 d

PSR B1257+12 d is an uncommon exoplanet. It lies about 1,956.9 light-years from Earth, spans roughly 1.8 Earth radii, weighs about 3.9 Earth masses and completes an orbit every 98.21 days.

One of at least 3 planets orbiting its star.

How to see it

Like any astronomical target, PSR B1257+12 d 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 PSR B1257+12 d is an uncommon exoplanet

PSR B1257+12 d scores 29 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 4 points would lift it into a rarer tier.

That score comes from 4 science badges — Confirmed exoplanet, Super-Earth, Multi-planet system and Distant (>1000 ly) — 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.