About AT2021ueyL b
AT2021ueyL b is a rare exoplanet. It lies about 3,392 light-years from Earth, spans roughly 13.6 Earth radii, weighs about 425.89 Earth masses and completes an orbit every 4,168.69 days.
About 13.6× the width of Earth.
Rare exoplanet 41 EP
AT2021ueyL b
RA 324.5450° · Dec 26.4666° · exoplanet
Score breakdown
· 5 badgesRare 46 pts → Epic
- Found by microlensing +12
- Long-period world +10
- Distant (>1000 ly) +10
- Confirmed exoplanet +5
- Gas giant +4
Total score 41
5 more points to reach Epic.
Badges
- Confirmed exoplanet · +5
- Gas giant · +4
- Long-period world · +10
- Found by microlensing · +12
- 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. ≈ 59.6 million years at Voyager 1's speed (17 km/s).
- Fastest probe ever. ≈ 5.3 million years even at the Parker Solar Probe's 192 km/s.
- At 10% light speed. ≈ 33.9 thousand years in a starship at a tenth of light speed.
- Distance. 3392 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 6784 years round-trip.
Standing on it
- A year here. A full year lasts about 11.4 Earth years.
By the numbers
- Size. About 13.6× the width of Earth.
- Volume. About 2515 Earths could fit inside it.
- Mass. Roughly 426× Earth's mass — about 1.3 Jupiters.
- Your weight. You'd weigh about 2.3× your Earth weight standing here.
- Density. Less dense than water — drop it in a big enough ocean and it would float.
How we found it
- Discovery. Found by Multiple Observatories using the microlensing method.
Properties
- density gcc
- 0.93
- discovery facility
- Multiple Observatories
- discovery method
- Microlensing
- dist ly
- 3392.0224
- mass earth
- 425.8901
- name
- AT2021ueyL b
- orbital period days
- 4168.69
- radius earth
- 13.6
- sys num planets
- 1
How to see it
Like any astronomical target, AT2021ueyL 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 AT2021ueyL b is a rare exoplanet
AT2021ueyL b scores 41 points on Spacedle's rarity scale, which places it in the rare tier. Another 5 points would lift it into a rarer tier.
That score comes from 5 science badges — Confirmed exoplanet, Gas giant, Long-period world, Found by microlensing 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.