About HAT-P-57 b
HAT-P-57 b is an uncommon exoplanet. It lies about 912.8 light-years from Earth, has an equilibrium temperature near 2,200 K, spans roughly 19.5 Earth radii and weighs about 448.14 Earth masses.
About 19.5× the width of Earth.
Uncommon exoplanet 27 EP
HAT-P-57 b
RA 274.7434° · Dec 10.5972° · exoplanet
Score breakdown
· 4 badgesUncommon 33 pts → Rare
- Hot Jupiter +10
- Blasted by starlight +8
- Confirmed exoplanet +5
- Gas giant +4
Total score 27
6 more points to reach Rare.
Badges
- Confirmed exoplanet · +5
- Gas giant · +4
- Hot Jupiter · +10
- Blasted by starlight · +8
Trivia
Could we get there?
- Verdict. Hopelessly far for any craft humanity can build today.
Getting there
- Aboard Voyager 1. ≈ 16 million years at Voyager 1's speed (17 km/s).
- Fastest probe ever. ≈ 1.4 million years even at the Parker Solar Probe's 192 km/s.
- At 10% light speed. ≈ 9128 years in a starship at a tenth of light speed.
- Distance. 913 light-years from Earth.
Look-back time
- Look-back time. The light you'd see left around the year 1113.
Saying hello
- Say hello. A radio message and its reply would take 1826 years round-trip.
Standing on it
- A year here. A full year lasts just 2.5 Earth days.
By the numbers
- Size. About 19.5× the width of Earth.
- Volume. About 7419 Earths could fit inside it.
- Mass. Roughly 448× Earth's mass — about 1.4 Jupiters.
- Your weight. You'd weigh about 1.2× your Earth weight standing here.
- Density. Less dense than water — drop it in a big enough ocean and it would float.
- Temperature. Around 2200 K — hot enough to vaporise iron.
How we found it
- Discovery. Found by HATNet using the transit method.
Properties
- density gcc
- 0.332
- discovery facility
- HATNet
- discovery method
- Transit
- dist ly
- 912.7802
- eccentricity
- 0
- eq temp k
- 2200
- insolation
- 2726.6328
- mass earth
- 448.1403
- name
- HAT-P-57 b
- orbital period days
- 2.4653
- radius earth
- 19.5037
- sys num planets
- 1
How to see it
Like any astronomical target, HAT-P-57 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 HAT-P-57 b is an uncommon exoplanet
HAT-P-57 b scores 27 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 6 points would lift it into a rarer tier.
That score comes from 4 science badges — Confirmed exoplanet, Gas giant, Hot Jupiter and Blasted by starlight — 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.