Upsilon Pegasi, a white giant star in Pegasus
Upsilon Pegasi is a white giant star in the constellation Pegasus. At 170 light years away, it shines at an apparent visual magnitude of 4.42.
Upsilon Pegasi (HIP 115623)
Upsilon Pegasi is a white giant star in the constellation Pegasus. At 170 light years away, it shines at an apparent visual magnitude of 4.42. The iron abundance of Upsilon Pegasi is -0.01 (97.7% of the Sun). It is moving through the Galaxy at a speed of 50.6 km/s relative to the Sun. Its projected Galactic orbit carries it between 18,600 and 26,300 light years from the center of the Galaxy.
Sky position: RA 23h 25.4m, Dec +23° 24'
Common designations: Upsilon Pegasi, 68 Pegasi, HIP 115623, HD 220657, HR 8905
Brightest stars in Pegasus:
(list all)
| Rank | Mag. | Star |
| 7 | 3.51 | Sadalbari |
| 8 | 3.52 | Biham |
| 9 | 3.77 | Iota Pegasi |
| 10 | 3.97 | Lambda Pegasi |
| 11 | 4.08 | 1 Pegasi |
| 12 | 4.14 | Kappa Pegasi |
| 13 | 4.20 | Xi Pegasi |
| 14 | 4.28 | Pi Pegasi |
| 15 | 4.34 | 9 Pegasi |
16
| 4.42
) Upsilon Pegasi
| Rank | Mag. | Star |
| 17 | 4.52 | 2 Pegasi |
| 18 | 4.54 | 55 Pegasi |
| 19 | 4.54 | 70 Pegasi |
| 20 | 4.58 | Kerb |
| 21 | 4.63 | Psi Pegasi |
| 22 | 4.76 | 56 Pegasi |
| 23 | 4.78 | 32 Pegasi |
Hover over other bright stars to identify or click to jump.
Galactic Orbit of Upsilon Pegasi
(compared to the Sun)
E
ccentricity: 17.2% vs. 16.0%Angle φ : -124.6°vs. 26.0°
Semi-major axis : 6,888 pc vs. 8,686 pc
Semi-minor axis: 6,785 pc vs. 8,574 pc
Focus-to-center
: 1,182 pcvs. 1,388 pcSemilatus rectum : 6,685 pc vs. 8,464 pc
Perigalacticon: 5,706 pc vs. 7,297 pc
Apogalacticon
: 8,070 pcvs. 10,074 pcSome Tabulated XHIP Data for Upsilon Pegasi
(see also: SIMBAD)
Astrometry
2007A&A...474..653V
| Position | Proper Motion | |
| Right Ascension: | 351.34442226° ±0.14 mas | 192.24 ±0.15 mas/yr. |
| Declination: | 23.40401237° ±0.12 mas | 36.10 ±0.11 mas/yr. |
| Galactic Longitude: | 98.55672128° | 190.62 mas/yr. |
| Galactic Latitude: | -35.36143384° | -43.86 mas/yr. |
Parallax: 19.14 ± 0.18 mas
Spectrography
Spectral Type: F8III 2001AJ....121.2148G.
Radial Velocity: -14.60 ±2.00 km/s [A rating] 2006AstL...32..759G.
Iron Abundance [Fe/H]:
-0.01 ±0.04 dex
2011A&A...530A.138C, 2005ApJS..161..444T.
Photometry
| band | magnitude | Abs. Mag. |
| U | ||
| B | 5.04 | 1.45 |
| V | 4.42 | 0.83 |
| R | 4.10 | 0.51 |
| I | 3.80 | 0.21 |
| J | 3.53 | -0.06 |
| H | 3.23 | -0.36 |
| K | 3.03 | -0.56 |
B-V: +0.62 V-I: +0.62
Derivations
Heliocentric distance: 52.24 pc (0.9% margin of error)
Galactocentric distance: 7,407 pc
Transverse velocity: 48.4 km/s
3D heliocentric position and motion:
|
toward: |
Galactic center | Galactic rotation | North Galactic Pole |
| Position ( X, Y, Z) | -6.3 pc | 42.1 pc | -30.2 pc |
| Velocity (U, V, W) | -44.0 km/s | -25.0 km/s | -0.4 km/s |