HD_27894_b Knowpia

HD 27894 b
Discovery
Discovered by	Moutou, Mayor,; Bouchy et al.
Discovery date	15 Feb 2005
Detection method	Radial velocity
Orbital characteristics
Semi-major axis	0.1221 ± 0.0071 AU (18,270,000 ± 1,060,000 km)
Eccentricity	0.049±0.08
Orbital period (sidereal)	17.991±0.007 d
Time of periastron	2,453,275.46±0.48
Argument of periastron	132.9±9.7
Semi-amplitude	58.1±0.5
Star	HD 27894
Physical characteristics
Mass	>0.618±0.088 MJ; (>196 ME)

HD 27894 b is a gas giant with a mass at least two thirds that of Jupiter, or twice that of Saturn. The distance from the planet to the star is one third compared that of Mercury from the Sun, and it takes almost exactly 18 days to complete one roughly circular orbit.^[1]

References edit

^ Moutou, C.; et al. (2015). "The HARPS search for southern extra-solar planets IV. Three close-in planets around HD 2638, HD 27894 and HD 63454". Astronomy and Astrophysics. 439 (1): 367–373. arXiv:1411.7048. Bibcode:2005A&A...439..367M. doi:10.1051/0004-6361:20052826.

External links edit

"HD 27894". Exoplanets. Archived from the original on 2009-11-25. Retrieved 2008-10-29.

[Moutou2005-1] Moutou, C.; et al. (2015). "The HARPS search for southern extra-solar planets IV. Three close-in planets around HD 2638, HD 27894 and HD 63454". Astronomy and Astrophysics. 439 (1): 367–373. arXiv:1411.7048. Bibcode:2005A&A...439..367M. doi:10.1051/0004-6361:20052826.

[1]

Discovery
Discovered by	Moutou, Mayor, Bouchy et al.
Discovery date	15 Feb 2005
Detection method	Radial velocity
Orbital characteristics
Semi-major axis	0.1221 ± 0.0071 AU (18,270,000 ± 1,060,000 km)
Eccentricity	0.049±0.08
Orbital period (sidereal)	17.991±0.007 d
Time of periastron	2,453,275.46±0.48
Argument of periastron	132.9±9.7
Semi-amplitude	58.1±0.5
Star	HD 27894
Physical characteristics
Mass	>0.618±0.088 `M`_J (>196 `M`_E)

Summary

References edit

External links edit