About HD 15906 c
HD 15906 c is a common exoplanet. It lies about 148.6 light-years from Earth, has an equilibrium temperature near 532 K, spans roughly 2.93 Earth radii and weighs about 8.91 Earth masses.
One of at least 2 planets orbiting its star.
Common exoplanet 20 EP
HD 15906 c
RA 38.2713° · Dec -10.3522° · exoplanet
Score breakdown
· 4 badgesCommon 24 pts → Uncommon
- Multi-planet system +6
- Confirmed exoplanet +5
- Sub-Neptune +5
- Found by TESS +4
Total score 20
4 more points to reach Uncommon.
Badges
- Confirmed exoplanet · +5
- Sub-Neptune · +5
- Multi-planet system · +6
- Found by TESS · +4
Trivia
Could we get there?
- Verdict. Hopelessly far for any craft humanity can build today.
Getting there
- Aboard Voyager 1. ≈ 2.6 million years at Voyager 1's speed (17 km/s).
- Fastest probe ever. ≈ 232 thousand years even at the Parker Solar Probe's 192 km/s.
- At 10% light speed. ≈ 1486 years in a starship at a tenth of light speed.
- Distance. 149 light-years from Earth.
Look-back time
- Look-back time. The light you'd see left around the year 1877.
Saying hello
- Say hello. A radio message and its reply would take 297 years round-trip.
Standing on it
- A year here. A full year lasts just 21.6 Earth days.
By the numbers
- Size. About 2.9× the width of Earth.
- Volume. About 25.2 Earths could fit inside it.
- Mass. About 8.9× the mass of Earth.
- Your weight. You'd weigh about 1.0× your Earth weight standing here.
- Temperature. A scorching 259°C on average.
How we found it
- Discovery. Found by Transiting Exoplanet Survey Satellite (TESS) using the transit method.
Cosmic context
- Crowded system. One of at least 2 planets orbiting its star.
Properties
- density gcc
- 1.95
- discovery facility
- Transiting Exoplanet Survey Satellite (TESS)
- discovery method
- Transit
- dist ly
- 148.6035
- eccentricity
- 0.04
- eq temp k
- 532
- insolation
- 13.37
- mass earth
- 8.91
- name
- HD 15906 c
- orbital period days
- 21.5833
- radius earth
- 2.93
- sys num planets
- 2
How to see it
Like any astronomical target, HD 15906 c 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 15906 c is a common exoplanet
HD 15906 c scores 20 points on Spacedle's rarity scale, which places it in the common tier. Another 4 points would lift it into a rarer tier.
That score comes from 4 science badges — Confirmed exoplanet, Sub-Neptune, Multi-planet system and Found by TESS — 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.