chi Eridani, a yellow subgiant star in Eridanus
chi Eridani is a yellow subgiant star in the constellation Eridanus. At 58 light years away, it is the 354th brightest star in the Earth's sky, where it shines at an apparent visual magnitude of 3.69.
chi Eridani (HIP 9007)
chi Eridani is a yellow subgiant star in the constellation Eridanus. At 58 light years away, it is the 354th brightest star in the Earth's sky, where it shines at an apparent visual magnitude of 3.69. chi Eridani is a multiple-star system. The iron abundance of chi Eridani is -0.07 (85.1% of the Sun). It is moving through the Galaxy at a speed of 62.7 km/s relative to the Sun. Its projected Galactic orbit carries it between 19,400 and 30,000 light years from the center of the Galaxy.
Sky position: RA 1h 55.9m, Dec -51° 36.6'
Common designations: Chi Eridani, HIP 9007, HD 11937, Gliese 81 A
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Brightest stars in Eridanus:
(list all)
| Rank | Mag. | Star |
| 1 | 0.45 | Achernar |
| 2 | 2.78 | Cursa |
| 3 | 2.88 | Acamar |
| 4 | 2.97 | Zaurak |
| 5 | 3.52 | Rana |
| 6 | 3.55 | Upsilon-4 Eridani |
| 7 | 3.56 | Phi Eridani |
8
| 3.69
) chi Eridani
| Rank | Mag. | Star |
| 9 | 3.70 | Tau-4 Eridani |
| 10 | 3.72 | Epsilon Eridani |
| 11 | 3.81 | Theemim |
| 12 | 3.86 | Sceptrum |
| 13 | 3.89 | Azha |
| 14 | 3.93 | Nu Eridani |
| 15 | 3.97 | 43 Eridani |
| 16 | 4.01 | Mu Eridani |
| 17 | 4.04 | Beid |
Galactic Orbit of chi Eridani
(compared to the Sun)
E
ccentricity: 21.4% vs. 16.0%Angle φ : -95.6°vs. 26.0°
Semi-major axis : 7,591 pc vs. 8,686 pc
Semi-minor axis: 7,415 pc vs. 8,574 pc
Focus-to-center
: 1,625 pcvs. 1,388 pcSemilatus rectum : 7,243 pc vs. 8,464 pc
Perigalacticon: 5,966 pc vs. 7,297 pc
Apogalacticon
: 9,216 pcvs. 10,074 pcSome Tabulated XHIP Data for chi Eridani
(see also: SIMBAD)
Astrometry
2007A&A...474..653V
| Position | Proper Motion | |
| Right Ascension: | 28.98680221° ±0.30 mas | 676.40 ±0.90 mas/yr. |
| Declination: | -51.60958691° ±0.29 mas | 293.30 ±0.80 mas/yr. |
| Galactic Longitude: | 280.86574802° | -727.91 mas/yr. |
| Galactic Latitude: | -62.66612277° | 117.00 mas/yr. |
Parallax: 56.02 ± 0.38 mas
Spectrography
Spectral Type: G8IV 2006A&A...460..695T.
Radial Velocity: -6.30 ±0.70 km/s [A rating] 2006AstL...32..759G.
Iron Abundance [Fe/H]:
-0.07 dex
1995AJ....110.2968L.
Photometry
| band | magnitude | Abs. Mag. |
| U | ||
| B | 4.53 | 3.28 |
| V | 3.69 | 2.43 |
| R | ||
| I | 2.91 | 1.65 |
| J | ||
| H | ||
| K |
B-V: +0.84 V-I: +0.78
Derivations
Heliocentric distance: 17.85 pc (0.7% margin of error)
Galactocentric distance: 7,398 pc
Transverse velocity: 62.4 km/s
3D heliocentric position and motion:
|
toward: |
Galactic center | Galactic rotation | North Galactic Pole |
| Position ( X, Y, Z) | 1.5 pc | -8.0 pc | -15.9 pc |
| Velocity (U, V, W) | -59.4 km/s | -17.4 km/s | 10.1 km/s |