HD 17943

HD 17943
Observation data; Epoch J2000 Equinox J2000
Constellation	Eridanus
Right ascension	02h 52m 50.74s
Declination	−09° 26′ 28.4″
Apparent magnitude (V)	6.325
Characteristics
Evolutionary stage	main-sequence star
Spectral type	A4V
Astrometry
Radial velocity (Rv)	38.07±0.28 km/s
Proper motion (μ)	RA: 109.825 mas/yr ; Dec.: 40.094 mas/yr
Parallax (π)	10.6465 ± 0.0374 mas
Distance	306 ± 1 ly ; (93.9 ± 0.3 pc)
Absolute magnitude (MV)	1.30[citation needed]
Other designations
	BD−10 569, HD 17943, HIP 13421, HR 859, SAO 130160, TYC 5286-1109-1, 33 G. Eridani[citation needed]
Database references
SIMBAD	data

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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 02^h 52^m 50.74^s 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]

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

^ ^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.

[GaiaDR3-1] ^ ^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.

[SIMBAD-2] "HD 17943". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 13 January 2024.

[3] Johann Bayer (1603). Uranometria. p. 117.

[BSC-4] 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

[Toone2019-5] 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.

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[2]

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[4]

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Observation data Epoch J2000 Equinox J2000
Constellation	Eridanus
Right ascension	02^h 52^m 50.74^s^[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 (R_v)	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 (M_V)	1.30^{[citation needed]}

Other designations
BD−10 569, HD 17943, HIP 13421, HR 859, SAO 130160, TYC 5286-1109-1,^[2] 33 G. Eridani^{[citation needed]}
Database references
SIMBAD	data