HD 68988

From Wikipedia, the free encyclopedia

**HD 68988**
Observation data Epoch J2000.0
Constellation (pronunciation)	Ursa Major
Right ascension	08^h 18^m 22.2^s
Declination	+61° 27′ 38.6″
Apparent magnitude (V)	+8.21
Distance	192 ly (58.8 pc)
Spectral type	G0
Other designations
HIP 40867, SAO 14467

HD 68988 is a star in Ursa Major constellation. It is an eighth magnitude yellow dwarf.

1 Planets
- 1.1 HD 68988 b
- 1.2 HD 68988 c
2 References
3 External links

[edit] Planets

There is one confirmed and one unconfirmed planet discovered in 2001 and 2006 respectively.

[edit] HD 68988 b

**HD 68988 b**
Orbital elements

Semi-major axis a:	0.0704 AU
Eccentricity e:	0.1497 ± 0.0079
Orbital period P:	6.27670 ± 0.000053 d
Inclination i:	?°
Angular distance θ:	1.20 mas
Longitude of periastron ω:	40 ± 170°
Time of periastron τ:	2451549.062 ± 0.040 JD
Semi-amplitude K:	191.6 ± 1.7 m/s
Physical characteristics
Mass:	>1.92 M_J
Radius:	? R_J
Density:	? kg/m³
Gravity:	? g
Temperature:	? K
Discovery
Discovery date:	2001
Discovery site:
Detection method(s):	Radial velocity
Discoverer(s):	Butler et al.
Other catalogue

HD 68988 b is a jovian planet. The planet is a hot jupiter that orbits in moderate eccentricity.

[edit] HD 68988 c

**HD 68988 c**
Orbital elements

Semi-major axis a:	5.32 AU
Eccentricity e:	0.01 ± 0.27
Orbital period P:	4100 ± 7300 d
Inclination i:	?°
Angular distance θ:	103.448 mas
Longitude of periastron ω:	129°
Time of periastron τ:	2452730 ± 510 JD
Semi-amplitude K:	60 ± 11 m/s
Physical characteristics
Mass:	>5.29 M_J
Radius:	? R_J
Density:	? kg/m³
Gravity:	? g
Temperature:	? K
Discovery
Discovery date:	2006 (TBC)
Discovery site:	California, US
Detection method(s):	Radial velocity
Discoverer(s):	Wright et al.
Other catalogue

HD 68988 c is an unconfirmed planetary companion. The parameters including period and eccentricity are highly uncertain. The semimajor axis would be 5.32 AU with an orbital period of 4100 ± 7300 days (11 years).