Pi2 Ursae Majoris

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For other stars named Pi UMa, see Pi Ursae Majoris
For other stars named Muscida, see Muscida


π2 Ursae Majoris
Observation data
Epoch J2000.0
Constellation
(pronunciation)		 Ursa Major
Right ascension 08h 40m 12.8s
Declination +64° 19′ 40″
Apparent magnitude (V) +4.59
Distance 252 ± 14 ly
(77 ± 4 pc)
Spectral type K1+IIIb
Other designations
4 Ursae Majoris, HR 3403, HD 73108, BD+64°698, FK5 2677, HIP 42527, SAO 14616, GC 11850

Pi2 Ursae Majoris (π2 UMa / π2 Ursae Majoris) is an orange K-type giant star with an apparent magnitude of +4.59. It is approximately 250 light years from Earth. It has also the traditional name Muscida.

[edit] The planet

The Pi2 Ursae Majoris system
Companion
(in order from star)		 Mass
(MJ)		 Orbital period
(days)		 Semimajor axis
(AU)		 Eccentricity
b >7.1 (± 1.6) 269.3 (± 1.96) 0.87 (± 0.04) 0.432 (± 0.024)

The planet 4 Ursae Majoris b is seven times more massive than Jupiter. Its orbit is eccentric, orbiting Pi2 Ursae Majoris at 87% the distance from Sun to Earth.

[edit] See also

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