43 Eridani, an orange giant star in Eridanus
43 Eridani is an orange giant star in the constellation Eridanus. At 296 light years away, it is the 500th brightest star in the Earth's sky, where it shines at an apparent visual magnitude of 3.97.
43 Eridani (HIP 20535)
43 Eridani is an orange giant star in the constellation Eridanus. At 296 light years away, it is the 500th brightest star in the Earth's sky, where it shines at an apparent visual magnitude of 3.97. The iron abundance of 43 Eridani is -0.14 (72.4% of the Sun). It is moving through the Galaxy at a speed of 45.5 km/s relative to the Sun. Its projected Galactic orbit carries it between 20,400 and 26,200 light years from the center of the Galaxy.
Sky position: RA 4h 24.0m, Dec -34° 1.2'
Common designations: d Eridani, 43 Eridani, HIP 20535, HD 28028
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Brightest stars in Eridanus:
(list all)
| Rank | Mag. | Star |
| 6 | 3.55 | Upsilon-4 Eridani |
| 7 | 3.56 | Phi Eridani |
| 8 | 3.69 | chi Eridani |
| 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
| Rank | Mag. | Star |
| 16 | 4.01 | Mu Eridani |
| 17 | 4.04 | Beid |
| 18 | 4.08 | Tau-3 Eridani |
| 19 | 4.11 | Iota Eridani |
| 20 | 4.17 | g Eridani |
| 21 | 4.22 | Tau-6 Eridani |
| 22 | 4.24 | Kappa Eridani |
Hover over other bright stars to identify or click to jump.
Galactic Orbit of 43 Eridani
(compared to the Sun)
E
ccentricity: 12.5% vs. 16.0%Angle φ : -116.2°vs. 26.0°
Semi-major axis : 7,138 pc vs. 8,686 pc
Semi-minor axis: 7,082 pc vs. 8,574 pc
Focus-to-center
: 891 pcvs. 1,388 pcSemilatus rectum : 7,027 pc vs. 8,464 pc
Perigalacticon: 6,248 pc vs. 7,297 pc
Apogalacticon
: 8,029 pcvs. 10,074 pcSome Tabulated XHIP Data for 43 Eridani
(see also: SIMBAD)
Astrometry
2007A&A...474..653V
| Position | Proper Motion | |
| Right Ascension: | 66.00902221° ±0.25 mas | 71.00 ±0.70 mas/yr. |
| Declination: | -34.01698620° ±0.31 mas | 55.10 ±0.70 mas/yr. |
| Galactic Longitude: | 235.17272677° | -46.90 mas/yr. |
| Galactic Latitude: | -44.22727401° | 76.66 mas/yr. |
Parallax: 11.01 ± 0.37 mas
Spectrography
Spectral Type: K3.5III 1989ApJS...71..245K.
Radial Velocity: 24.10 ±0.70 km/s [A rating] 2006AstL...32..759G.
Iron Abundance [Fe/H]:
-0.14 ±0.06 dex
1990ApJS...74.1075M.
Photometry
| band | magnitude | Abs. Mag. |
| U | ||
| B | 5.44 | 0.65 |
| V | 3.97 | -0.82 |
| R | ||
| I | 2.60 | -2.19 |
| J | 1.40 | -3.39 |
| H | 0.62 | -4.17 |
| K | 0.43 | -4.36 |
B-V: +1.47 V-I: +1.37
Derivations
Heliocentric distance: 90.70 pc (3.4% margin of error)
Galactocentric distance: 7,437 pc
Transverse velocity: 38.6 km/s
3D heliocentric position and motion:
|
toward: |
Galactic center | Galactic rotation | North Galactic Pole |
| Position ( X, Y, Z) | -37.1 pc | -53.4 pc | -63.3 pc |
| Velocity (U, V, W) | -39.5 km/s | -21.5 km/s | 6.8 km/s |