About HD 3651 b
HD 3651 b is a common exoplanet. It lies about 36.3 light-years from Earth, has an equilibrium temperature near 433 K, spans roughly 10.1 Earth radii and weighs about 72.47 Earth masses.
About 10.1× the width of Earth.
Common exoplanet 18 EP
HD 3651 b
RA 9.8387° · Dec 21.2489° · exoplanet
Score breakdown
· 3 badgesCommon 24 pts → Uncommon
- Eccentric orbit +9
- Confirmed exoplanet +5
- Gas giant +4
Total score 18
6 more points to reach Uncommon.
Badges
- Confirmed exoplanet · +5
- Gas giant · +4
- Eccentric orbit · +9
Trivia
Could we get there?
- Verdict. Hopelessly far for any craft humanity can build today.
Getting there
- Aboard Voyager 1. ≈ 638.1 thousand years at Voyager 1's speed (17 km/s).
- Fastest probe ever. ≈ 56.7 thousand years even at the Parker Solar Probe's 192 km/s.
- At 10% light speed. ≈ 363 years in a starship at a tenth of light speed.
- Distance. 36.3 light-years from Earth.
Look-back time
- Look-back time. The light you'd see left around the year 1990.
Saying hello
- Say hello. A radio message and its reply would take 72.6 years round-trip.
Standing on it
- A year here. A full year lasts just 62.2 Earth days.
By the numbers
- Size. About 10.1× the width of Earth.
- Volume. About 1030 Earths could fit inside it.
- Mass. Roughly 72.5× Earth's mass — about 0.2 Jupiters.
- Your weight. You'd weigh about 0.7× your Earth weight standing here.
- Density. Less dense than water — drop it in a big enough ocean and it would float.
- Temperature. A scorching 160°C on average.
How we found it
- Discovery. Found by Multiple Observatories using the radial velocity method.
Properties
- density gcc
- 0.386
- discovery facility
- Multiple Observatories
- discovery method
- Radial Velocity
- dist ly
- 36.3129
- eccentricity
- 0.645
- eq temp k
- 432.84
- insolation
- 6.1123
- mass earth
- 72.4652
- name
- HD 3651 b
- orbital period days
- 62.25
- radius earth
- 10.1
- sys num planets
- 1
How to see it
Like any astronomical target, HD 3651 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 3651 b is a common exoplanet
HD 3651 b scores 18 points on Spacedle's rarity scale, which places it in the common tier. Another 6 points would lift it into a rarer tier.
That score comes from 3 science badges — Confirmed exoplanet, Gas giant and Eccentric orbit — 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.