Upsilon Andromedae

Article Index for
Upsilon

Website Links For
Upsilon

Information About

Upsilon Andromedae

Caption

Upsilon Andromedae (circled) in Andromeda

	Epoch	J20000
	Constell	Andromeda
	Ra	01<sup>h</sup> 36<sup>m</sup> 478<sup>s</sup>
	Dec	+41&deg 24' 20"
	Appmag V	+409

	Class	F8V / M45V
	B-v	054 /
	U-b	006 /
	Variable	none /

	Radial V	-289 /
	Prop Mo Ra	-17257 /
	Prop Mo Dec	-38103 /
	Parallax	7425 /
	P Error	072 /
	Dist Ly	439
	Dist Pc	135
	Absmag V	396 /

	Mass	13 /
	Radius	16 /
	Luminosity	34 /
	Temperature	6,000 /
	Metal	134% /
	Rotation	~8 km/sec /
	Age	3 &times 10<sup>9</sup> /

	Name	Upsilon Andromedae Ab
	Semimajor	0059
	Eccentricity	0012 (&plusmn 015)
	Period	4617 (&plusmn 00003)
	Long Peri	73
	T Peri	2,450,002093
	Mass	069
	Discovery Date	1996
	Discovery Method	Doppler Spectroscopy
	Discoverers	Marcy et al

	Name	Upsilon Andromedae Ac
	Semimajor	0829
	Eccentricity	028 (&plusmn 011)
	Period	2415 (&plusmn 11)
	Long Peri	250
	T Peri	2,450,1605
	Mass	189
	Discovery Date	1999
	Discovery Method	Doppler Spectroscopy
	Discoverers	Marcy et al

	Name	Upsilon Andromedae Ad
	Semimajor	253
	Eccentricity	027 (&plusmn 011)
	Period	1284 (&plusmn 30)
	Long Peri	260
	T Peri	2,450,064
	Mass	375
	Discovery Date	1999
	Discovery Method	Doppler Spectroscopy
	Discoverers	Marcy et al