About HD 208527 b
HD 208527 b is a rare exoplanet. It lies about 1,018.3 light-years from Earth, has an equilibrium temperature near 960 K, spans roughly 12.5 Earth radii and weighs about 3,146.4 Earth masses.
Packed denser than solid iron.
Rare exoplanet 37 EP
HD 208527 b
RA 329.0999° · Dec 21.2399° · exoplanet
Score breakdown
· 4 badgesRare 46 pts → Epic
- Denser than iron +18
- Distant (>1000 ly) +10
- Confirmed exoplanet +5
- Gas giant +4
Total score 37
9 more points to reach Epic.
Badges
- Confirmed exoplanet · +5
- Gas giant · +4
- Denser than iron · +18
- Distant (>1000 ly) · +10
Trivia
What makes it special
- Heavyweight. Packed denser than solid iron.
Could we get there?
- Verdict. Impossible with our current technology — and the next millennium of it.
Getting there
- Aboard Voyager 1. ≈ 17.9 million years at Voyager 1's speed (17 km/s).
- Fastest probe ever. ≈ 1.6 million years even at the Parker Solar Probe's 192 km/s.
- At 10% light speed. ≈ 10.2 thousand years in a starship at a tenth of light speed.
- Distance. 1018 light-years from Earth.
Look-back time
- Look-back time. The light you'd see left around the year 1008.
Saying hello
- Say hello. A radio message and its reply would take 2037 years round-trip.
Standing on it
- A year here. A full year lasts about 2.4 Earth years.
By the numbers
- Size. About 12.5× the width of Earth.
- Volume. About 1953 Earths could fit inside it.
- Mass. Roughly 3146× Earth's mass — about 9.9 Jupiters.
- Your weight. You'd weigh about 20.1× your Earth weight standing here.
- Density. Denser than solid iron.
- Temperature. Around 687°C — hotter than a self-cleaning oven.
How we found it
- Discovery. Found by Bohyunsan Optical Astronomical Observatory using the radial velocity method.
Properties
- density gcc
- 8.85
- discovery facility
- Bohyunsan Optical Astronomical Observatory
- discovery method
- Radial Velocity
- dist ly
- 1018.2656
- eccentricity
- 0.08
- eq temp k
- 959.79
- insolation
- 165.4934
- mass earth
- 3146.4
- name
- HD 208527 b
- orbital period days
- 875.5
- radius earth
- 12.5
- sys num planets
- 1
How to see it
Like any astronomical target, HD 208527 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 208527 b is a rare exoplanet
HD 208527 b scores 37 points on Spacedle's rarity scale, which places it in the rare tier. Another 9 points would lift it into a rarer tier.
That score comes from 4 science badges — Confirmed exoplanet, Gas giant, Denser than iron 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.