HIP 65426 b

HIP 65426 b, formally named Najsakopajk, is a super-Jupiter exoplanet orbiting the star HIP 65426. It was discovered on 6 July 2017 by the SPHERE consortium using the Spectro-Polarimetric High-Contrast Exoplanet Research (SPHERE) instrument belonging to the European Southern Observatory (ESO). It is 385 light-years from Earth. It is the first planet discovered by ESO's SPHERE instrument.

HIP 65426 b / Najsakopajk
HIP 65426 b is on the lower left of the image, with the circle representing what Neptune's orbit would look like around the star HIP 65426, represented by a small cross.
Discovery
Discovered bySPHERE consortium
Discovery date6 July 2017
Direct imaging
Designations
Najsakopajk
Orbital characteristics
87+108
−31 au
Inclination100+15
−6 deg
Physical characteristics
Mean radius
Atmospheric model:
0.92±0.04 RJ
Evolutionary model:
1.45±0.03 RJ
Mass7.1±1.1 MJ
4.07±0.19 dex
TemperatureAtmospheric model:
1667+25
−24 K

1560±100 K

Evolutionary model:
1282+26
−31 K
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