About BD+63 1405 b
BD+63 1405 b is a rare exoplanet. It lies about 124.1 light-years from Earth, has an equilibrium temperature near 151 K, spans roughly 12.4 Earth radii and weighs about 3,305.42 Earth masses.
Packed denser than solid iron.
Rare exoplanet 36 EP
BD+63 1405 b
RA 271.3979° · Dec 63.6700° · exoplanet
Score breakdown
· 4 badgesRare 46 pts → Epic
- Denser than iron +18
- Eccentric orbit +9
- Confirmed exoplanet +5
- Gas giant +4
Total score 36
10 more points to reach Epic.
Badges
- Confirmed exoplanet · +5
- Gas giant · +4
- Eccentric orbit · +9
- Denser than iron · +18
Trivia
What makes it special
- Heavyweight. Packed denser than solid iron.
Could we get there?
- Verdict. Hopelessly far for any craft humanity can build today.
Getting there
- Aboard Voyager 1. ≈ 2.2 million years at Voyager 1's speed (17 km/s).
- Fastest probe ever. ≈ 193.8 thousand years even at the Parker Solar Probe's 192 km/s.
- At 10% light speed. ≈ 1241 years in a starship at a tenth of light speed.
- Distance. 124 light-years from Earth.
Look-back time
- Look-back time. The light you'd see left around the year 1902.
Saying hello
- Say hello. A radio message and its reply would take 248 years round-trip.
Standing on it
- A year here. A full year lasts about 3.3 Earth years.
By the numbers
- Size. About 12.4× the width of Earth.
- Volume. About 1907 Earths could fit inside it.
- Mass. Roughly 3305× Earth's mass — about 10.4 Jupiters.
- Your weight. You'd weigh about 21.5× your Earth weight standing here.
- Density. Denser than solid iron.
- Temperature. A frigid -122°C — colder than dry ice.
How we found it
- Discovery. Found by Haute-Provence Observatory using the radial velocity method.
Cosmic context
- Wild orbit. Its highly elliptical path swings between scorching and frozen each lap.
Properties
- density gcc
- 9.53
- discovery facility
- Haute-Provence Observatory
- discovery method
- Radial Velocity
- dist ly
- 124.0936
- eccentricity
- 0.88
- eq temp k
- 150.69
- insolation
- 0.0911
- mass earth
- 3305.4154
- name
- BD+63 1405 b
- orbital period days
- 1198.48
- radius earth
- 12.4
- sys num planets
- 1
How to see it
Like any astronomical target, BD+63 1405 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+63 1405 b is a rare exoplanet
BD+63 1405 b scores 36 points on Spacedle's rarity scale, which places it in the rare tier. Another 10 points would lift it into a rarer tier.
That score comes from 4 science badges — Confirmed exoplanet, Gas giant, Eccentric orbit and Denser than iron — 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.