54 Piscium

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54 Piscium

Observation data
Epoch J2000

Constellation
(pronunciation)

Pisces

Right ascension

00^h 39^m 21.8^s

Declination

+21° 15′ 01.7″

Apparent magnitude (V)

5.80

Characteristics

Spectral type

K0 V

U-B color index

0.57

B-V color index

0.85

Variable type

Suspected

Astrometry

Radial velocity (R_v)

−34.2 km/s

Proper motion (μ)

RA: −461.09 mas/yr
Dec.: −370.90 mas/yr

Parallax (π)

90.03 ± 0.72 mas

Distance

36.2 ± 0.3 ly
(11.11 ± 0.09 pc)

Absolute magnitude (M_V)

5.65

Details

Mass

0.78 M_☉

Radius

0.86 R_☉

Luminosity

0.48 L_☉

Metallicity

110%

Planet

Companion

Mass (M_J)

>0.227

Orbital period (days)

62.206

Semimajor axis (AU)

0.296

Eccentricity

0.618

Other designations

GJ 27, HR 166, BD +20°85, HD 3651, LHS 1116, LTT 10224, GCTP 110.00, SAO 74175, LFT 59, NSV 245, HIP 3093.

54 Piscium (abbreviated 54 Psc) is a 6th magnitude star in the constellation of Pisces. It is classified as an orange dwarf star (spectral class K0 V) and is somewhat less massive and luminous than our Sun. The star is relatively nearby, distance being only 36 light years. It is visible to the unaided eye under very good conditions. The planet 54 Piscium b was found orbiting the star in 2003.^[1] The star is also suspected to be variable in brightness.

1 54 Piscium B
2 References
3 See also
4 External links

[edit] 54 Piscium B

**54 Piscium B**
Observation data Epoch 2000
Constellation (pronunciation)	Pisces
Right ascension	0^h 39^m 32^s
Declination	+21° 15' 15"
Distance	36.2 ± 0.3 ly (11.11 ± 0.09 pc)
Spectral type	T
Other designations
BD+20°85B

54 Piscium has a companion which was classified as a T class brown dwarf with mass 50 times the mass of Jupiter. It was imaged by Spitzer Space Telescope. It's orbit has a 500AU radius and orbital period of more than a thousand years.^[2]