Lambda Eridani, a blue giant star in Eridanus
Lambda Eridani is a blue giant star in the constellation Eridanus. At 809 light years away, it shines at an apparent visual magnitude of 4.25.
Lambda Eridani (HIP 23972)
Lambda Eridani is a blue giant star in the constellation Eridanus. At 809 light years away, it shines at an apparent visual magnitude of 4.25. It is moving through the Galaxy at a speed of 3.1 km/s relative to the Sun. Its projected Galactic orbit carries it between 24,200 and 34,000 light years from the center of the Galaxy.
Sky position: RA 5h 9.1m, Dec -8° 45'
Common designations: Lambda Eridani, 69 Eridani, HIP 23972, HD 33328
Brightest stars in Eridanus:
(list all)
| Rank | Mag. | Star |
| 14 | 3.93 | Nu Eridani |
| 15 | 3.97 | 43 Eridani |
| 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 |
23
| 4.25
) Lambda Eridani
| Rank | Mag. | Star |
| 24 | 4.26 | 82 Eridani |
| 25 | 4.26 | Tau-5 Eridani |
| 26 | 4.30 | f Eridani |
| 27 | 4.32 | 54 Eridani |
| 28 | 4.36 | Omega Eridani |
| 29 | 4.43 | Pi Eridani |
| 30 | 4.43 | Keid |
Hover over other bright stars to identify or click to jump.
Galactic Orbit of Lambda Eridani
(compared to the Sun)
E
ccentricity: 16.8% vs. 16.0%Angle φ : 31.1°vs. 26.0°
Semi-major axis : 8,938 pc vs. 8,686 pc
Semi-minor axis: 8,811 pc vs. 8,574 pc
Focus-to-center
: 1,499 pcvs. 1,388 pcSemilatus rectum : 8,686 pc vs. 8,464 pc
Perigalacticon: 7,438 pc vs. 7,297 pc
Apogalacticon
: 10,437 pcvs. 10,074 pcSome Tabulated XHIP Data for Lambda Eridani
(see also: SIMBAD)
Astrometry
2007A&A...474..653V
| Position | Proper Motion | |
| Right Ascension: | 77.28659584° ±0.14 mas | 0.26 ±0.16 mas/yr. |
| Declination: | -8.75407600° ±0.11 mas | -1.99 ±0.11 mas/yr. |
| Galactic Longitude: | 209.14019514° | 1.90 mas/yr. |
| Galactic Latitude: | -26.68555812° | -0.64 mas/yr. |
Parallax: 4.02 ± 0.18 mas
Spectrography
Spectral Type: B2III(e)p 1982ApJS...50...55S.
Radial Velocity: 2.00 ±4.20 km/s [A rating] 2006AstL...32..759G.
Iron Abundance [Fe/H]:
n/a
Photometry
band
magnitude
Abs. Mag.
U
3.17
-3.80
B
4.06
-2.91
V
4.25
-2.72
R
I
4.39
-2.58
J
4.85
-2.12
H
4.83
-2.14
K
4.71
-2.26
B-V: -0.19 V-I: -0.14
Derivations
Heliocentric distance: 248.16 pc (4.5% margin of error)
Galactocentric distance: 7,595 pc
Transverse velocity: 2.4 km/s
3D heliocentric position and motion:
|
toward: |
Galactic center | Galactic rotation | North Galactic Pole |
| Position ( X, Y, Z) | -193.7 pc | -108.0 pc | -111.4 pc |
| Velocity (U, V, W) | -0.2 km/s | -2.7 km/s | -1.6 km/s |