Sceptrum, an orange giant star in Eridanus
Sceptrum is an orange giant star in the constellation Eridanus. At 110 light years away, it is the 443rd brightest star in the Earth's sky, where it shines at an apparent visual magnitude of 3.86.
Sceptrum (HIP 21594)
Sceptrum is an orange giant star in the constellation Eridanus. At 110 light years away, it is the 443rd brightest star in the Earth's sky, where it shines at an apparent visual magnitude of 3.86. Sceptrum is a multiple-star system. The iron abundance of Sceptrum is +0.03 (107.2% of the Sun). It is moving through the Galaxy at a speed of 50.7 km/s relative to the Sun. Its projected Galactic orbit carries it between 20,100 and 24,300 light years from the center of the Galaxy. It came closest to the Sun 530,000 years ago when it had brightened to magnitude 2.67 from a distance of 63 light years.
Sky position: RA 4h 38.2m, Dec -14° 18'
Common designations: Sceptrum, l Eridani, 53 Eridani, HIP 21594, HD 29503, Gliese 9160
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Brightest stars in Eridanus:
(list all)
| Rank | Mag. | Star |
| 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 |
| 9 | 3.70 | Tau-4 Eridani |
| 10 | 3.72 | Epsilon Eridani |
| 11 | 3.81 | Theemim |
12
| 3.86
) Sceptrum
| Rank | Mag. | Star |
| 13 | 3.89 | Azha |
| 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 |
Hover over other bright stars to identify or click to jump.
Galactic Orbit of Sceptrum
(compared to the Sun)
E
ccentricity: 9.5% vs. 16.0%Angle φ : 161.7°vs. 26.0°
Semi-major axis : 6,813 pc vs. 8,686 pc
Semi-minor axis: 6,782 pc vs. 8,574 pc
Focus-to-center
: 650 pcvs. 1,388 pcSemilatus rectum : 6,751 pc vs. 8,464 pc
Perigalacticon: 6,164 pc vs. 7,297 pc
Apogalacticon
: 7,463 pcvs. 10,074 pcSome Tabulated XHIP Data for Sceptrum
(see also: SIMBAD)
Astrometry
2007A&A...474..653V
| Position | Proper Motion | |
| Right Ascension: | 69.54529569° ±0.25 mas | -76.00 ±1.90 mas/yr. |
| Declination: | -14.30358698° ±0.22 mas | -167.20 ±1.90 mas/yr. |
| Galactic Longitude: | 211.31938521° | 123.38 mas/yr. |
| Galactic Latitude: | -35.89560325° | -136.05 mas/yr. |
Parallax: 29.69 ± 0.37 mas
Spectrography
Spectral Type: K1III 2006AJ....132..161G.
Radial Velocity: 41.40 ±1.10 km/s [A rating] 2006AstL...32..759G.
Iron Abundance [Fe/H]:
0.03 ±0.03 dex
2008A&A...484L..21M, 2001ApJ...551..L85Z, 1990ApJS...74.1075M.
Photometry
| band | magnitude | Abs. Mag. |
| U | ||
| B | 4.94 | 2.31 |
| V | 3.86 | 1.22 |
| R | ||
| I | 2.90 | 0.27 |
| J | 2.02 | -0.62 |
| H | 1.53 | -1.11 |
| K | 1.44 | -1.20 |
B-V: +1.08 V-I: +0.96
Derivations
Heliocentric distance: 33.68 pc (1.2% margin of error)
Galactocentric distance: 7,423 pc
Transverse velocity: 29.3 km/s
3D heliocentric position and motion:
|
toward: |
Galactic center | Galactic rotation | North Galactic Pole |
| Position ( X, Y, Z) | -23.3 pc | -14.2 pc | -19.7 pc |
| Velocity (U, V, W) | -7.5 km/s | -27.6 km/s | -41.9 km/s |