12 Persei, a white main-sequence star in Perseus
12 Persei is a white main-sequence star in the constellation Perseus. At 79 light years away, it shines at an apparent visual magnitude of 4.91.
12 Persei (HIP 12623)
12 Persei is a white main-sequence star in the constellation Perseus. At 79 light years away, it shines at an apparent visual magnitude of 4.91. 12 Persei is a multiple-star system. The star's age is estimated to be 2.6 billion years but is certainly no less than 2.5 billion years and no greater than 2.8 billion years. The iron abundance of 12 Persei is +0.23 (169.8% of the Sun). It is moving through the Galaxy at a speed of 31.2 km/s relative to the Sun. Its projected Galactic orbit carries it between 19,400 and 27,000 light years from the center of the Galaxy. It will come closest to the Sun 560,000 years from now when it will brighten to magnitude 4.06 from a distance of 53 light years.
Sky position: RA 2h 42.2m, Dec +40° 11.4'
Common designations: 12 Persei, HIP 12623, HD 16739, Gliese 9095
Brightest stars in Perseus:
(list all)
| Rank | Mag. | Star |
| 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 |
| 31 | 4.80 | 53 Persei |
| 32 | 4.85 | HR 991 |
| 33 | 4.89 | 1 Aurigae |
34
| 4.91
) 12 Persei
| Rank | Mag. | Star |
| 35 | 4.93 | 54 Persei |
| 36 | 4.94 | 24 Persei |
| 37 | 4.96 | 32 Persei |
| 38 | 4.97 | 40 Persei |
| 39 | 4.99 | 4 Persei |
| 40 | 4.99 | HR 1034 |
| 41 | 5.04 | HR 969 |
Hover over other bright stars to identify or click to jump.
Galactic Orbit of 12 Persei
(compared to the Sun)
E
ccentricity: 16.2% vs. 16.0%Angle φ : 114.0°vs. 26.0°
Semi-major axis : 7,116 pc vs. 8,686 pc
Semi-minor axis: 7,022 pc vs. 8,574 pc
Focus-to-center
: 1,154 pcvs. 1,388 pcSemilatus rectum : 6,929 pc vs. 8,464 pc
Perigalacticon: 5,962 pc vs. 7,297 pc
Apogalacticon
: 8,270 pcvs. 10,074 pcSome Tabulated XHIP Data for 12 Persei
(see also: SIMBAD)
Astrometry
2007A&A...474..653V
| Position | Proper Motion | |
| Right Ascension: | 40.56220344° ±0.37 mas | -18.90 ±0.80 mas/yr. |
| Declination: | 40.19438712° ±0.23 mas | -182.60 ±0.90 mas/yr. |
| Galactic Longitude: | 144.84515996° | 62.38 mas/yr. |
| Galactic Latitude: | -17.91550685° | -172.65 mas/yr. |
Parallax: 41.34 ± 0.43 mas
Spectrography
Spectral Type: F9V 2009ApJS..180..117A.
Radial Velocity:
-23.04 ±0.04 km/s [A rating]
2004A&A...424..727P.
This star is a spectroscopic binary with a solved orbit.
Iron Abundance [Fe/H]:
0.23 dex
2009A&A...501..941H, 2007ApJS..169..430R.
Photometry
| band | magnitude | Abs. Mag. |
| U | ||
| B | 5.49 | 3.57 |
| V | 4.91 | 2.99 |
| R | 4.50 | 2.58 |
| I | 4.20 | 2.28 |
| J | 4.21 | 2.29 |
| H | 3.97 | 2.06 |
| K | 3.88 | 1.96 |
B-V: +0.58 V-I: +0.71
Derivations
Heliocentric distance: 24.19 pc (1.0% margin of error)
Galactocentric distance: 7,419 pc
Transverse velocity: 21.0 km/s
3D heliocentric position and motion:
|
toward: |
Galactic center | Galactic rotation | North Galactic Pole |
| Position ( X, Y, Z) | -18.8 pc | 13.3 pc | -7.4 pc |
| Velocity (U, V, W) | 18.8 km/s | -22.0 km/s | -11.7 km/s |