About V0391 Peg b
V0391 Peg b is a common exoplanet. It lies about 3,900.8 light-years from Earth, has an equilibrium temperature near 520 K, spans roughly 13.1 Earth radii and weighs about 1,017.06 Earth masses.
About 13.1× the width of Earth.
Common exoplanet 19 EP
V0391 Peg b
RA 331.0504° · Dec 26.4188° · exoplanet
Score breakdown
· 3 badgesCommon 24 pts → Uncommon
- Distant (>1000 ly) +10
- Confirmed exoplanet +5
- Gas giant +4
Total score 19
5 more points to reach Uncommon.
Badges
- Confirmed exoplanet · +5
- Gas giant · +4
- 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. ≈ 68.5 million years at Voyager 1's speed (17 km/s).
- Fastest probe ever. ≈ 6.1 million years even at the Parker Solar Probe's 192 km/s.
- At 10% light speed. ≈ 39 thousand years in a starship at a tenth of light speed.
- Distance. 3901 light-years from Earth.
Look-back time
- Look-back time. Its light left before the last ice age ended.
Saying hello
- Say hello. A radio message and its reply would take 7802 years round-trip.
Standing on it
- A year here. A full year lasts about 3.2 Earth years.
By the numbers
- Size. About 13.1× the width of Earth.
- Volume. About 2248 Earths could fit inside it.
- Mass. Roughly 1017× Earth's mass — about 3.2 Jupiters.
- Your weight. You'd weigh about 5.9× your Earth weight standing here.
- Temperature. A scorching 247°C on average.
How we found it
- Discovery. Found by Multiple Observatories using the pulsation timing variations method.
Properties
- density gcc
- 2.49
- discovery facility
- Multiple Observatories
- discovery method
- Pulsation Timing Variations
- dist ly
- 3900.7605
- eccentricity
- 0
- eq temp k
- 519.69
- insolation
- 9.375
- mass earth
- 1017.056
- name
- V0391 Peg b
- orbital period days
- 1170
- radius earth
- 13.1
- sys num planets
- 1
How to see it
Like any astronomical target, V0391 Peg 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 V0391 Peg b is a common exoplanet
V0391 Peg b scores 19 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 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.