About HU Aqr AB c
HU Aqr AB c is a rare exoplanet. It lies about 626.9 light-years from Earth, spans roughly 12.9 Earth radii, weighs about 1,430.23 Earth masses and completes an orbit every 4,368 days.
One of at least 2 planets orbiting its star.
Rare exoplanet 34 EP
HU Aqr AB c
RA 316.9922° · Dec -5.2949° · exoplanet
Score breakdown
· 5 badgesRare 46 pts → Epic
- Long-period world +10
- Eccentric orbit +9
- Multi-planet system +6
- Confirmed exoplanet +5
- Gas giant +4
Total score 34
12 more points to reach Epic.
Badges
- Confirmed exoplanet · +5
- Gas giant · +4
- Long-period world · +10
- Eccentric orbit · +9
- Multi-planet system · +6
Trivia
Could we get there?
- Verdict. Hopelessly far for any craft humanity can build today.
Getting there
- Aboard Voyager 1. ≈ 11 million years at Voyager 1's speed (17 km/s).
- Fastest probe ever. ≈ 978.8 thousand years even at the Parker Solar Probe's 192 km/s.
- At 10% light speed. ≈ 6269 years in a starship at a tenth of light speed.
- Distance. 627 light-years from Earth.
Look-back time
- Look-back time. The light you'd see left around the year 1399.
Saying hello
- Say hello. A radio message and its reply would take 1254 years round-trip.
Standing on it
- A year here. A full year lasts about 12 Earth years.
By the numbers
- Size. About 12.9× the width of Earth.
- Volume. About 2147 Earths could fit inside it.
- Mass. Roughly 1430× Earth's mass — about 4.5 Jupiters.
- Your weight. You'd weigh about 8.6× your Earth weight standing here.
How we found it
- Discovery. Found by Yunnan Astronomical Observatory using the eclipse timing variations method.
Cosmic context
- Crowded system. One of at least 2 planets orbiting its star.
Properties
- density gcc
- 3.66
- discovery facility
- Yunnan Astronomical Observatory
- discovery method
- Eclipse Timing Variations
- dist ly
- 626.8656
- eccentricity
- 0.51
- mass earth
- 1430.235
- name
- HU Aqr AB c
- orbital period days
- 4368
- radius earth
- 12.9
- sys num planets
- 2
How to see it
Like any astronomical target, HU Aqr AB 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 HU Aqr AB c is a rare exoplanet
HU Aqr AB c scores 34 points on Spacedle's rarity scale, which places it in the rare tier. Another 12 points would lift it into a rarer tier.
That score comes from 5 science badges — Confirmed exoplanet, Gas giant, Long-period world, Eccentric orbit and Multi-planet system — 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.