Psi Andromedae

Psi Andromedae
	Location of ψ Andromedae (circled)
Observation data; Epoch J2000 Equinox J2000
Constellation	Andromeda
Right ascension	23h 46m 02.04703s
Declination	+46° 25′ 12.9865″
Apparent magnitude (V)	4.95
Characteristics
Spectral type	G5 Ib + B9
U−B color index	+0.83
B−V color index	+1.085
Astrometry
Radial velocity (Rv)	-23.62 km/s
Proper motion (μ)	RA: 8.446(132) mas/yr ; Dec.: −7.143(109) mas/yr
Parallax (π)	1.6352 ± 0.1627 mas
Distance	2,000 ± 200 ly ; (610 ± 60 pc)
Absolute magnitude (MV)	–3.039
Details
ψ And A
Mass	5.4 M☉
Radius	47.58 R☉
Luminosity	1,049±161 L☉
Surface gravity (log g)	1.50 cgs
Temperature	4,990 K
Metallicity [Fe/H]	+0.10 dex
Age	79 Myr
B
Mass	2.6 M☉
Temperature	11,000 K
Other designations
	20 And, BD+45° 4321, FK5 1622, HD 223047, HIP 117221, HR 9003, SAO 53355, PPM 64635
Database references
SIMBAD	data

Psi Andromedae (ψ And, ψ Andromedae) is the Bayer designation for a triple star^[4] system in the northern constellation of Andromeda. The combined apparent visual magnitude of this system is 4.95.^[2] Based upon parallax measurements, is roughly 2,000 light-years (610 parsecs) from Earth.^[1]

The primary component has a stellar classification of G5 Ib,^[3] which matches the spectrum of an evolved supergiant star. It forms a pair with a star of type B9 with an unknown luminosity class separated by 0.28 arcseconds. A third component has a separation of 0.14 arcseconds. Details of the orbital arrangement remain uncertain.^[4]

Naming

In Chinese, 螣蛇 (Téng Shé), meaning Flying Serpent, refers to an asterism consisting of ψ Andromedae, α Lacertae, 4 Lacertae, π² Cygni, π¹ Cygni, HD 206267, ε Cephei, β Lacertae, σ Cassiopeiae, ρ Cassiopeiae, τ Cassiopeiae, AR Cassiopeiae, 9 Lacertae, 3 Andromedae, 7 Andromedae, 8 Andromedae, λ Andromedae, κ Andromedae and ι Andromedae,. Consequently, the Chinese name for ψ Andromedae itself is 螣蛇二十 (Téng Shé èrshí, English: the Twentieth of Flying Serpent).^[7]

References

^ ^a ^b ^c ^d ^e ^f Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
^ ^a ^b ^c Argue, A. N. (1966), "UBV photometry of 550 F, G and K type stars", Monthly Notices of the Royal Astronomical Society, 133 (4): 475–493, Bibcode:1966MNRAS.133..475A, doi:10.1093/mnras/133.4.475.
^ ^a ^b ^c ^d ^e ^f ^g ^h Soubiran, C.; et al. (March 2008), "Vertical distribution of Galactic disk stars. IV. AMR and AVR from clump giants", Astronomy and Astrophysics, 480 (1): 91–101, arXiv:0712.1370, Bibcode:2008A&A...480...91S, doi:10.1051/0004-6361:20078788, S2CID 16602121.
^ ^a ^b ^c ^d ^e ^f ^g Parsons, Sidney B. (May 2004), "New and Confirmed Triple Systems with Luminous Cool Primaries and Hot Companions", The Astronomical Journal, 127 (5): 2915–2930, Bibcode:2004AJ....127.2915P, doi:10.1086/383546.
^ ^a ^b McDonald, I.; Zijlstra, A. A.; Watson, R. A. (2017-10-01). "Fundamental parameters and infrared excesses of Tycho-Gaia stars". Monthly Notices of the Royal Astronomical Society. 471 (1): 770–791. arXiv:1706.02208. Bibcode:2017MNRAS.471..770M. doi:10.1093/mnras/stx1433. ISSN 0035-8711. Psi Andromedae's database entry at VizieR.
^ "* psi And". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 28 January 2018.
^ (in Chinese) AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 7 日 Archived 2011-05-21 at the Wayback Machine

[Gaia_EDR3-1] ^ ^a ^b ^c ^d ^e ^f Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.

[mnras133_475-2] Argue, A. N. (1966), "UBV photometry of 550 F, G and K type stars", Monthly Notices of the Royal Astronomical Society, 133 (4): 475–493, Bibcode:1966MNRAS.133..475A, doi:10.1093/mnras/133.4.475.

[aaa480_1_91-3] ^ ^a ^b ^c ^d ^e ^f ^g ^h Soubiran, C.; et al. (March 2008), "Vertical distribution of Galactic disk stars. IV. AMR and AVR from clump giants", Astronomy and Astrophysics, 480 (1): 91–101, arXiv:0712.1370, Bibcode:2008A&A...480...91S, doi:10.1051/0004-6361:20078788, S2CID 16602121.

[aj127_5_2915-4] ^ ^a ^b ^c ^d ^e ^f ^g Parsons, Sidney B. (May 2004), "New and Confirmed Triple Systems with Luminous Cool Primaries and Hot Companions", The Astronomical Journal, 127 (5): 2915–2930, Bibcode:2004AJ....127.2915P, doi:10.1086/383546.

[tycho-gaia-5] McDonald, I.; Zijlstra, A. A.; Watson, R. A. (2017-10-01). "Fundamental parameters and infrared excesses of Tycho-Gaia stars". Monthly Notices of the Royal Astronomical Society. 471 (1): 770–791. arXiv:1706.02208. Bibcode:2017MNRAS.471..770M. doi:10.1093/mnras/stx1433. ISSN 0035-8711. Psi Andromedae's database entry at VizieR.

[SIMBAD-6] "* psi And". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 28 January 2018.

[7] (in Chinese) AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 7 日 Archived 2011-05-21 at the Wayback Machine

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Psi Andromedae

Naming

References

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