HD 102272 b

HD 102272 b
Exoplanet List of exoplanets
Parent star
Star HD 102272
Constellation Leo
Right ascension (α) 11h 46m 23.5351s[1]
Declination (δ) +14° 07′ 26.350″[1]
Apparent magnitude (mV) 8.71[1]
Distance1200±300 ly
(360±90[2] pc)
Spectral type K0[3]
Orbital elements
Semi-major axis(a) 0.614 ± 0.001[3] AU
Eccentricity (e) 0.05 ± 0.04[3]
Orbital period(P) 127.58 ± 0.30[3] d
Argument of
periastron		 (ω) 118 ± 58[3]°
Time of periastron (T0) 2452146 ± 64[3] JD
Semi-amplitude (K) 155.5 ± 5.6[3] m/s
Physical characteristics
Mass(m)>5.9 ± 0.2[3] MJ
Discovery information
Discovery date 18 June 2008
Discoverer(s) Niedzielski et al.
Discovery method Radial velocity
Discovery site McDonald Observatory, United States
Discovery status Published[3]

HD 102272 b is an extrasolar planet approximately 1,200 light-years away in the constellation of Leo. The planet was discovered orbiting the K-type giant star HD 102272 in 2008. The planet was discovered by the radial velocity method, using the Hobby-Eberly Telescope. Another planet, HD 102272 c, was also discovered orbiting the same star. The discovery was announced in June 2008. HD 102272 b orbits at an average of 0.614 astronomical units away from its star, with a mass at least 5.9 ± 0.2 times that of Jupiter.[3]

See also

References

  1. 1 2 3 HD 102272, entry, SIMBAD. Accessed on line June 18, 2008.
  2. ↑ "Notes for star HD 102272". The Extrasolar Planets Encyclopaedia. Retrieved 2008-07-01.
  3. 1 2 3 4 5 6 7 8 9 10 Niedzielski, A.; et al. (2009). "A Planet in a 0.6 AU Orbit Around the K0 Giant HD 102272". The Astrophysical Journal. 693 (1): 276–280. Bibcode:2009ApJ...693..276N. arXiv:0810.1710 Freely accessible. doi:10.1088/0004-637X/693/1/276.

Coordinates: 11h 46m 23.5351s, +14° 07′ 26.350″


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