Sigma Persei, an orange giant star in Perseus
Sigma Persei is an orange giant star in the constellation Perseus. At 359 light years away, it shines at an apparent visual magnitude of 4.36.
Sigma Persei (HIP 16335)
Sigma Persei is an orange giant star in the constellation Perseus. At 359 light years away, it shines at an apparent visual magnitude of 4.36. The iron abundance of Sigma Persei is -0.15 (70.8% of the Sun). It is moving through the Galaxy at a speed of 17.4 km/s relative to the Sun. Its projected Galactic orbit carries it between 24,400 and 43,600 light years from the center of the Galaxy. It came closest to the Sun 5.1 million years ago when it had brightened to magnitude 3.11 from a distance of 202 light years.
Sky position: RA 3h 30.6m, Dec +48° 0'
Common designations: Sigma Persei, 35 Persei, HIP 16335, HD 21552
Brightest stars in Perseus:
(list all)
| Rank | Mag. | Star |
| 14 | 3.98 | Menkhib |
| 15 | 4.01 | Phi Persei |
| 16 | 4.05 | Iota Persei |
| 17 | 4.10 | Theta Persei |
| 18 | 4.12 | Mu Persei |
| 19 | 4.22 | 16 Persei |
| 20 | 4.25 | Lambda Persei |
| 21 | 4.25 | 58 Persei |
| 22 | 4.32 | Psi Persei |
23
| 4.36
) Sigma Persei
| Rank | Mag. | Star |
| 24 | 4.56 | 17 Persei |
| 25 | 4.60 | b Persei |
| 26 | 4.61 | Gorgonea Quarta |
| 27 | 4.67 | 34 Persei |
| 28 | 4.67 | 52 Persei |
| 29 | 4.68 | Gorgonea Secunda |
| 30 | 4.77 | k Persei |
Hover over other bright stars to identify or click to jump.
Galactic Orbit of Sigma Persei
(compared to the Sun)
E
ccentricity: 28.2% vs. 16.0%Angle φ : 1.1°vs. 26.0°
Semi-major axis : 10,440 pc vs. 8,686 pc
Semi-minor axis: 10,015 pc vs. 8,574 pc
Focus-to-center
: 2,947 pcvs. 1,388 pcSemilatus rectum : 9,608 pc vs. 8,464 pc
Perigalacticon: 7,493 pc vs. 7,297 pc
Apogalacticon
: 13,387 pcvs. 10,074 pcSome Tabulated XHIP Data for Sigma Persei
(see also: SIMBAD)
Astrometry
2007A&A...474..653V
| Position | Proper Motion | |
| Right Ascension: | 52.64367644° ±0.20 mas | 3.43 ±0.24 mas/yr. |
| Declination: | 47.99517197° ±0.17 mas | 18.33 ±0.23 mas/yr. |
| Galactic Longitude: | 148.48019437° | -7.71 mas/yr. |
| Galactic Latitude: | -6.82507696° | 16.98 mas/yr. |
Parallax: 9.07 ± 0.26 mas
Spectrography
Spectral Type: K3- III 1989ApJS...71..245K.
Radial Velocity: 14.36 ±0.19 km/s [A rating] 2005A&A...430..165F.
Iron Abundance [Fe/H]:
-0.15 dex
2007A&A...475.1003H, 1990ApJS...74.1075M.
Photometry
| band | magnitude | Abs. Mag. |
| U | ||
| B | 5.73 | 0.52 |
| V | 4.36 | -0.85 |
| R | ||
| I | 3.08 | -2.13 |
| J | 1.92 | -3.29 |
| H | 1.24 | -3.97 |
| K | 1.05 | -4.16 |
B-V: +1.37 V-I: +1.28
Derivations
Heliocentric distance: 110.14 pc (2.9% margin of error)
Galactocentric distance: 7,494 pc
Transverse velocity: 9.7 km/s
3D heliocentric position and motion:
|
toward: |
Galactic center | Galactic rotation | North Galactic Pole |
| Position ( X, Y, Z) | -93.2 pc | 57.2 pc | -13.1 pc |
| Velocity (U, V, W) | -10.9 km/s | 11.4 km/s | 7.1 km/s |