51 Pegasi, a yellow main-sequence star in Pegasus
51 Pegasi is a yellow main-sequence star in the constellation Pegasus. At 51 light years away, it shines at an apparent visual magnitude of 5.45.
51 Pegasi (HIP 113357)
51 Pegasi is a yellow main-sequence star in the constellation Pegasus. At 51 light years away, it shines at an apparent visual magnitude of 5.45. The star's age is estimated to be 6 billion years but is certainly no less than 4 billion years and no greater than 8.1 billion years. The iron abundance of 51 Pegasi is +0.17 (147.9% of the Sun). It is moving through the Galaxy at a speed of 36.9 km/s relative to the Sun. Its projected Galactic orbit carries it between 18,700 and 24,100 light years from the center of the Galaxy. It will come closest to the Sun 373,000 years from now when it will brighten to magnitude 3.63 from a distance of 22.0 light years. 51 Pegasi has one confirmed planet known to date (July 2013).
Sky position: RA 22h 57.5m, Dec +20° 46.2'
Common designations: 51 Pegasi, HIP 113357, HD 217014, HR 8729, Gliese 882
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Brightest stars in Pegasus:
(list all)
| Rank | Mag. | Star |
| 40 | 5.29 | 12 Pegasi |
| 41 | 5.30 | 7 Pegasi |
| 42 | 5.30 | 82 Pegasi |
| 43 | 5.33 | 71 Pegasi |
| 44 | 5.34 | 13 Pegasi |
| 45 | 5.34 | HR 8475 |
| 46 | 5.35 | 64 Pegasi |
| 47 | 5.37 | 30 Pegasi |
| 48 | 5.39 | 58 Pegasi |
49
| 5.45
) 51 Pegasi
| Rank | Mag. | Star |
| 50 | 5.46 | 5 Pegasi |
| 51 | 5.49 | 75 Pegasi |
| 52 | 5.51 | 37 Pegasi |
| 53 | 5.52 | 15 Pegasi |
| 54 | 5.54 | 17 Pegasi |
| 55 | 5.55 | 86 Pegasi |
| 56 | 5.56 | 67 Pegasi |
Hover over other bright stars to identify or click to jump.
Galactic Orbit of 51 Pegasi
(compared to the Sun)
E
ccentricity: 12.8% vs. 16.0%Angle φ : -176.2°vs. 26.0°
Semi-major axis : 6,564 pc vs. 8,686 pc
Semi-minor axis: 6,510 pc vs. 8,574 pc
Focus-to-center
: 839 pcvs. 1,388 pcSemilatus rectum : 6,456 pc vs. 8,464 pc
Perigalacticon: 5,725 pc vs. 7,297 pc
Apogalacticon
: 7,402 pcvs. 10,074 pcSome Tabulated XHIP Data for 51 Pegasi
(see also: SIMBAD)
Astrometry
2007A&A...474..653V
| Position | Proper Motion | |
| Right Ascension: | 344.36604474° ±0.29 mas | 207.36 ±0.28 mas/yr. |
| Declination: | 20.76868422° ±0.16 mas | 60.23 ±0.27 mas/yr. |
| Galactic Longitude: | 90.06201608° | 208.66 mas/yr. |
| Galactic Latitude: | -34.72712665° | -55.55 mas/yr. |
Parallax: 64.07 ± 0.38 mas
Spectrography
Spectral Type: G2V+ 2006AJ....132..161G.
Radial Velocity: -33.22 ±0.10 km/s [A rating] 2002ApJS..141..503N, 2005ApJS..159..141V.
Iron Abundance [Fe/H]:
0.17 dex
2011A&A...525A..71W, 2009A&A...508L..17R, 2009A&A...501..941H, 2008A&A...480...91S, 2006AJ....131.3069L, 2005PASJ...57...27T, 2005ApJS..161..444T, 2005ApJS..159..141V, 2004A&A...418..551M, 2004A&A...415.1153S, 2003AJ....126.2015H, 2003A&A...410..527B, 2003A&A...398..363S, 2002AJ....124.2224Z, 2001AJ....121..432G, 1998A&A...336..942F, 1998A&A...334..221G, 1997A&A...327..587T, 1996A&A...314..191G, 1993A&A...275..101E, 1990ApJS...74.1075M.
Photometry
| band | magnitude | Abs. Mag. |
| U | ||
| B | 6.12 | 5.15 |
| V | 5.45 | 4.48 |
| R | 5.00 | 4.03 |
| I | 4.70 | 3.73 |
| J | 4.66 | 3.69 |
| H | 4.23 | 3.27 |
| K | 3.91 | 2.94 |
B-V: +0.67 V-I: +0.75
Derivations
Heliocentric distance: 15.61 pc (0.6% margin of error)
Galactocentric distance: 7,400 pc
Transverse velocity: 16.0 km/s
3D heliocentric position and motion:
|
toward: |
Galactic center | Galactic rotation | North Galactic Pole |
| Position ( X, Y, Z) | 0.0 pc | 12.8 pc | -8.9 pc |
| Velocity (U, V, W) | -15.4 km/s | -29.7 km/s | 15.5 km/s |