23 Ursae Majoris
  | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Ursa Major |
| Right ascension | 09h 31m 31.70873s[1] |
| Declination | +63° 03′ 42.7013″[1] |
| Apparent magnitude (V) | +3.65[2] / +9.0 |
| Characteristics | |
| Spectral type | F0IV[3] |
| B−V color index | 0.360±0.015[2] |
| Details | |
| 23 UMa A | |
Gyr | |
| Database references | |
| SIMBAD | data |
23 Ursae Majoris, or 23 UMa, is a
apparent visual magnitude of +3.65.[2] It is moving closer to the Earth with a heliocentric radial velocity of −10 km/s.[2]
The primary component is a yellow-white
arcseconds
is the 9th magnitude secondary companion. There is a magnitude +10.5 optical companion at an angular separation of 99.6 arcseconds.
Nomenclature
With τ, υ, φ, θ, e and f, it composed the Arabic asterism Sarīr Banāt al-Na'sh, the Throne of the daughters of Na'sh, and Al-Haud, the Pond.[6] According to the catalogue of stars in the Technical Memorandum 33-507 - A Reduced Star Catalog Containing 537 Named Stars, Al-Haud was the title for seven stars : f as Alhaud I, τ as Alhaud II, e as Alhaud III, this star (h) as Alhaud IV, θ as Alhaud V, υ as Alhaud VI and φ as Alhaud VII .[7]
References
- ^ S2CID 18759600.
- ^ S2CID 119257644.
- ^ S2CID 14911430, 40. See Table 3.
- ^ a b "h UMa". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-03-19.
- S2CID 18993744. See Table 10.
- Allen, Richard Hinckley(1899), Star-Names and Their Meanings, New York: G. E. Stechert, p. 442.
- ^ Rhoads, Jack W. (November 15, 1971), Technical Memorandum 33-507-A Reduced Star Catalog Containing 537 Named Stars (PDF), Jet Propulsion Laboratory, California Institute of Technology.
External links
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