HR 2562 b
HR 2562 b is a brown dwarf or gas giant exoplanet. It is a substellar companion of the debris disk host star HR 2562. HR 2562 is a sixth-magnitude F-type main-sequence star located 110.92 ± 0.16 light-years (34.007 ± 0.048 pc) away. HR 2562 is about 37% more massive than the Sun.
| Discovery | |
|---|---|
| Discovered by | Q. Konopacky et al. |
| Discovery date | 23 August 2016 |
Detection method | Direct imaging |
| Orbital characteristics | |
Semi-major axis | 20.3 ± 0.3 AU (3.037×109 ± 45,000,000 km) |
| Star | HR 2562 |
| Physical characteristics | |
Mean radius | 1.11 ± 0.11 RJ |
| Mass | 29 ± 15 MJ |
Surface gravity | log(g) = 4.70 ± 0.32 m/s² |
| Temperature | 1200 ± 100 K |
Initially categorised as brown dwarf, HR 2562 b's exact mass is unknown, and is thought to be 29 ± 15 Jupiter masses, and its luminosity is about solar luminosity. Its spectral type is L7±3. It was first observed in 2016 using the Gemini Planet Imager.
According to NASA Exoplanet Archive, with a mass of nearly 30 MJ, it is listed as the most massive exoplanet.
HR 2562 b resides interior to the parent star's debris disk, and its orbit is coplanar to it. The disk is inclined 78.0° from the plane of the sky to the line of sight, and ranges from 38 ± 20 au to 187 ± 20 au away from the central star.