Eta² Fornacis

η² Fornacis
	Location of η2 Fornacis (bottom star inside circle)
Observation data; Epoch J2000.0 Equinox J2000.0 (ICRS)
Constellation	Fornax
Right ascension	02h 50m 14.7837s
Declination	−35° 50′ 37.023″
Apparent magnitude (V)	5.47
Characteristics
Evolutionary stage	giant
Spectral type	K0III
B−V color index	0.9
Astrometry
Radial velocity (Rv)	17.30±0.76 km/s
Proper motion (μ)	RA: +51.003 mas/yr ; Dec.: +18.217 mas/yr
Parallax (π)	7.6745 ± 0.1512 mas
Distance	425 ± 8 ly ; (130 ± 3 pc)
Details
Mass	2.9 M☉
Radius	9.4 R☉
Luminosity	72 L☉
Surface gravity (log g)	2.76 cgs
Temperature	5,061 K
Age	414 Myr
Other designations
	η2 For, CD−36°1067, HD 17793, HIP 13225, HR 851, SAO 193940
Database references
SIMBAD	data

Eta² Fornacis (η² Fornacis) is an orange giant in the constellation of Fornax. The star has a spectral type of K0III and an apparent magnitude of 6.02. The star is visually close to, but unrelated with the similar stars η¹ Fornacis and η³ Fornacis.^[4] The star is located at approximately 425 light years away, and forms a visual binary system with a 10th magnitude companion.^[6]

References[edit]

^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l 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.
^ Hoffleit, D.; Warren, Jr., W. H. (1991). The Bright Star Catalogue (5th Revised ed.). New Haven: Astronomical Data Center, NSSDC/ADC. Bibcode:1964cbs..book.....H.
^ Houk, N. (1982). Michigan Catalogue of Two-dimensional Spectral Types for the HD stars. Volume_3. Declinations -40_ƒ0 to -26_ƒ0. Bibcode:1982mcts.book.....H.
^ ^a ^b "η2 Fornacis (eta2 Fornacis)". The Sky Live. Retrieved 17 October 2023.
^ "* eta03 For". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2023-09-28.
^ "VizieR". VizieR. Retrieved 17 October 2023.

This giant-star-related article is a stub. You can help Wikipedia by expanding it.

[dr3-1] ^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l 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.

[bsc-2] Hoffleit, D.; Warren, Jr., W. H. (1991). The Bright Star Catalogue (5th Revised ed.). New Haven: Astronomical Data Center, NSSDC/ADC. Bibcode:1964cbs..book.....H.

[houk1982-3] Houk, N. (1982). Michigan Catalogue of Two-dimensional Spectral Types for the HD stars. Volume_3. Declinations -40_ƒ0 to -26_ƒ0. Bibcode:1982mcts.book.....H.

[theskylive-4] "η2 Fornacis (eta2 Fornacis)". The Sky Live. Retrieved 17 October 2023.

[SIMBAD-5] "* eta03 For". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2023-09-28.

[vizier-6] "VizieR". VizieR. Retrieved 17 October 2023.

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Observation data Epoch J2000.0 Equinox J2000.0 (ICRS)
Location of η² Fornacis (bottom star inside circle)
Constellation	Fornax
Right ascension	02^h 50^m 14.7837^s^[1]
Declination	−35° 50′ 37.023″^[1]
Apparent magnitude (V)	5.47^[2]
Characteristics
Evolutionary stage	giant
Spectral type	K0III^[3]
B−V color index	0.9^[4]
Astrometry

Radial velocity (R_v)	17.30±0.76^[1] km/s
Proper motion (μ)	RA: +51.003^[1] mas/yr Dec.: +18.217^[1] mas/yr
Parallax (π)	7.6745 ± 0.1512 mas^[1]
Distance	425 ± 8 ly (130 ± 3 pc)

Details

Mass	2.9^[1] `M`_☉
Radius	9.4^[1] `R`_☉
Luminosity	72^[1] `L`_☉
Surface gravity (log g)	2.76^[1] cgs
Temperature	5,061^[1] K
Age	414^[1] Myr

Other designations
η² For, CD−36°1067, HD 17793, HIP 13225, HR 851, SAO 193940^[5]
Database references
SIMBAD	data