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54 Piscium
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54 Piscium Observation data
Epoch J2000
Constellation Pisces
Right ascension 00h 39m 21.8s
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 (Rv) −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 (MV) 5.65
Details
Mass 0.78 M☉
Radius 0.86 R☉
Luminosity 0.48 L☉
Metallicity 110%
Planet
Companion
b
Mass (MJ)
>0.227
Semimajor axis (AU)
0.296
Orbital period (days)
62.206
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. A planet was found orbiting the star in 2003.[1] The star is also suspected to be variable in brightness.
Contents
[hide]
* 1 54 Piscium B
* 2 References
* 3 See also
* 4 External links
[edit] 54 Piscium B
54 Piscium B Observation data
Epoch 2000
Constellation Pisces
Right ascension 0h 39m 32s
Declination +21° 15' 15"
Distance ? ly
(? pc)
Spectral type ?
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]
[edit] References
1. ^ Fischer et al. (2003). "A Sub-Saturn Mass Planet Orbiting HD 3651". The Astrophysical Journal 590: 1081-1087.
2. ^ http://www.space.com/scienceastronomy/060919_st_dwarf_system.html
[edit] See also
* 54 Piscium b
* 109 Piscium
[edit] External links
* SIMBAD 54 Psc A entry 54 Psc B entry
* Extrasolar Visions star entry
* The Extrasolar Planets Encyclopaedia entry
* The Encyclopedia of the Suns entry
* 54 Piscium SolStation entry.
* Alcyone emphemeris
* [1] Scientists Snap Images of First Brown Dwarf in Planetary System
This binary or multiple star system–related article is a stub. You can help Wikipedia by expanding it.
Retrieved from "http://en.wikipedia.org/wiki/54_Piscium"
Categories: Flamsteed objects | HD and HDE objects | HIP objects | Orange dwarfs | Pisces constellation | Suspected variables | Brown dwarfs | Binary stars | Extrasolar planets | Multiple star stubs
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