HD 240210 b

alt = Blue planet partially obscured by darkness floating in space. | caption = Artistic rendering of HD 240210 b | image = Planet_HD_240210_b.png |HD 240210 b

Discovery
Discovered by	Niedzielski et al.
Discovery site	La Silla Observatory
Discovery date	June 10, 2009
Detection method	radial velocity
Orbital characteristics
Apastron	1.53 AU (229,000,000 km)
Periastron	1.13 AU (169,000,000 km)
Semi-major axis	1.33 AU (199,000,000 km)
Eccentricity	0.15 ± 0.02
Orbital period (sidereal)	501.75 ± 2.33 d 1.3737 ± 0.0064 y
Time of periastron	54486.73 ± 10.93
Argument of periastron	277.49 ± 7.77
Star	HD 240210

HD 240210 b is a 6.9 Jupiter-mass exoplanet discovered on June 10, 2009 by Niedzielski Etal. using the Hobby-Eberly Telescope. ^[1] It orbits the K3 giant star HD 240210 in the constellation of Cassiopeia. Its average orbital separation is at 1.33 Astronomical Units away from its star with a year of 501.75 days.

See also

• BD+14°4559 b
• BD+20°2457 b
• BD+20°2457 c
• HD 240210

References

1. Niedzielski, A.; et al. (2009). "Substellar-mass Companions to the K-dwarf BD+14 4559 and the K-giants HD 240210 and BD+20 2457". The Astrophysical Journal. 707 (1): 768–777. arXiv: 0906.1804 . Bibcode:2009ApJ...707..768N. doi:10.1088/0004-637X/707/1/768. S2CID   16877069.