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HD 17943, or HR 859, is a high proper-motion star in the constellation of Eridanus. It has a right ascension of 02h 52m 50.74s and a declination of −09° 26′ 28.4″. Its apparent magnitude is equal to 6.325. Based on parallax measurements from the Gaia spacecraft, it is at a distance of 306 light-years (94 parsecs). It belongs to spectral class A4V.[2][1]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Eridanus |
| Right ascension | 02h 52m 50.74s[1] |
| Declination | −09° 26′ 28.4″[1] |
| Apparent magnitude (V) | 6.325[2] |
| Characteristics | |
| Evolutionary stage | main-sequence star |
| Spectral type | A4V[2] |
| Astrometry | |
| Radial velocity (Rv) | 38.07±0.28[1] km/s |
| Proper motion (μ) | RA: 109.825 mas/yr[1] Dec.: 40.094 mas/yr[1] |
| Parallax (π) | 10.6465 ± 0.0374 mas[1] |
| Distance | 306 ± 1 ly (93.9 ± 0.3 pc) |
| Absolute magnitude (MV) | 1.30[citation needed] |
| Other designations | |
| Database references | |
| SIMBAD | data |
This star is incorrectly called by the Bayer designation "Sigma Eridani" in the 1991 edition of the Bright Star Catalogue. Bayer's Sigma Eridani is in fact non-existent.[3][4][5]
References
edit- ^ a b c d e f Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ a b c d "HD 17943". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 13 January 2024.
- ^ Johann Bayer (1603). Uranometria. p. 117.
- ^ Hoffleit, D.; Warren, W. H. Jr. (November 1995). "VizieR Online Data Catalog: Bright Star Catalogue, 5th Revised Ed. (Hoffleit+, 1991)". Bibcode:1995yCat.5050....0H. Remarks for HR 859
- ^ Toone, John (March 2019). "Sigma Enigma. The case of sigma Eridanus" (PDF). British Astronomical Association Variable Star Section Circular (179): 18. Bibcode:2019BAAVC.179...18T.