V669 Cassiopeiae

V669 Cassiopeiae
Observation data; Epoch J2000.0 Equinox J2000.0
Constellation	Cassiopeia
Right ascension	01h 33m 51.21s
Declination	62° 26′ 53.2″
Apparent magnitude (V)	17.48
Characteristics
Evolutionary stage	AGB
Spectral type	M9III
Apparent magnitude (J)	16.747
Apparent magnitude (H)	11.232
Apparent magnitude (K)	7.097
Variable type	Mira?
Astrometry
Proper motion (μ)	RA: −2.813 mas/yr ; Dec.: −2.147 mas/yr
Parallax (π)	1.9523 ± 0.7049 mas
Distance	2,100 pc
Details
Radius	859 R☉
Luminosity	10,000 - 36,000 L☉
Temperature	2,750 K
Database references
SIMBAD	data

V669 Cassiopeiae or V669 Cas is an OH/IR star, a type of particularly cool red giant, with a spectral type of M9III.

With a mean visual apparent magnitude 17.5, V669 Cassiopeiae varies with an amplitude of about half a magnitude.^[2] In the mid-infrared L band, its magnitude range is 1.57 to 3.02. It is listed as a possible Mira variable, but with the extremely long period of 1,994 days.^[4]

The distance and physical properties of V559 Cassiopeiae are highly uncertain. Based on parallax, it is about 1,600 light years away, but a distance of about 20,000 light years has been derived based on observations of masers around the star.^[3] Based on a luminosity derived from its pulsations and spectral energy distribution, it would be at a distance of 6,850 light years.^[6]

References

^ ^a ^b ^c ^d ^e Cutri, Roc M.; et al. (2003). "VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)". CDS/ADC Collection of Electronic Catalogues. 2246: II/246. Bibcode:2003yCat.2246....0C.
^ ^a ^b Jayasinghe, T.; Kochanek, C. S.; Stanek, K. Z.; Shappee, B. J.; Holoien, T. W. -S.; Thompson, Todd A.; Prieto, J. L.; Dong, Subo; Pawlak, M.; Shields, J. V.; Pojmanski, G.; Otero, S.; Britt, C. A.; Will, D. (2018). "The ASAS-SN catalogue of variable stars I: The Serendipitous Survey". Monthly Notices of the Royal Astronomical Society. 477 (3): 3145. arXiv:1803.01001. Bibcode:2018MNRAS.477.3145J. doi:10.1093/mnras/sty838.
^ ^a ^b ^c ^d ^e De Beck, E.; Decin, L.; De Koter, A.; Justtanont, K.; Verhoelst, T.; Kemper, F.; Menten, K. M. (2010). "Probing the mass-loss history of AGB and red supergiant stars from CO rotational line profiles. II. CO line survey of evolved stars: Derivation of mass-loss rate formulae". Astronomy and Astrophysics. 523: A18. arXiv:1008.1083. Bibcode:2010A&A...523A..18D. doi:10.1051/0004-6361/200913771. S2CID 16131273.
^ ^a ^b Samus, N. N.; et al. (2017). "General Catalogue of Variable Stars". Astronomy Reports. 5.1. 61 (1): 80–88. Bibcode:2017ARep...61...80S. doi:10.1134/S1063772917010085. S2CID 125853869.
^ ^a ^b ^c Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
^ ^a ^b ^c Lombaert, R.; Decin, L.; De Koter, A.; Blommaert, J. A. D. L.; Royer, P.; De Beck, E.; De Vries, B. L.; Khouri, T.; Min, M. (2013). "H₂O vapor excitation in dusty AGB envelopes. A PACS view of OH 127.8+0.0". Astronomy and Astrophysics. 554. arXiv:1505.07696. Bibcode:2013A&A...554A.142L. doi:10.1051/0004-6361/201218974. S2CID 98319654.

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[2mass-1] Cutri, Roc M.; et al. (2003). "VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)". CDS/ADC Collection of Electronic Catalogues. 2246: II/246. Bibcode:2003yCat.2246....0C.

[asassn-2] Jayasinghe, T.; Kochanek, C. S.; Stanek, K. Z.; Shappee, B. J.; Holoien, T. W. -S.; Thompson, Todd A.; Prieto, J. L.; Dong, Subo; Pawlak, M.; Shields, J. V.; Pojmanski, G.; Otero, S.; Britt, C. A.; Will, D. (2018). "The ASAS-SN catalogue of variable stars I: The Serendipitous Survey". Monthly Notices of the Royal Astronomical Society. 477 (3): 3145. arXiv:1803.01001. Bibcode:2018MNRAS.477.3145J. doi:10.1093/mnras/sty838.

[debeck2010-3] De Beck, E.; Decin, L.; De Koter, A.; Justtanont, K.; Verhoelst, T.; Kemper, F.; Menten, K. M. (2010). "Probing the mass-loss history of AGB and red supergiant stars from CO rotational line profiles. II. CO line survey of evolved stars: Derivation of mass-loss rate formulae". Astronomy and Astrophysics. 523: A18. arXiv:1008.1083. Bibcode:2010A&A...523A..18D. doi:10.1051/0004-6361/200913771. S2CID 16131273.

[gcvs-4] Samus, N. N.; et al. (2017). "General Catalogue of Variable Stars". Astronomy Reports. 5.1. 61 (1): 80–88. Bibcode:2017ARep...61...80S. doi:10.1134/S1063772917010085. S2CID 125853869.

[dr2-5] Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.

[lombaert2013-6] Lombaert, R.; Decin, L.; De Koter, A.; Blommaert, J. A. D. L.; Royer, P.; De Beck, E.; De Vries, B. L.; Khouri, T.; Min, M. (2013). "H₂O vapor excitation in dusty AGB envelopes. A PACS view of OH 127.8+0.0". Astronomy and Astrophysics. 554. arXiv:1505.07696. Bibcode:2013A&A...554A.142L. doi:10.1051/0004-6361/201218974. S2CID 98319654.

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Observation data Epoch J2000.0 Equinox J2000.0
Constellation	Cassiopeia
Right ascension	01^h 33^m 51.21^s^[1]
Declination	62° 26′ 53.2″^[1]
Apparent magnitude (V)	17.48^[2]
Characteristics
Evolutionary stage	AGB^[3]
Spectral type	M9III^[3]
Apparent magnitude (J)	16.747^[1]
Apparent magnitude (H)	11.232^[1]
Apparent magnitude (K)	7.097^[1]
Variable type	Mira?^[4]
Astrometry

Proper motion (μ)	RA: −2.813^[5] mas/yr Dec.: −2.147^[5] mas/yr
Parallax (π)	1.9523 ± 0.7049 mas^[5]
Distance	2,100^[6] pc

Details

Radius	859^[3] `R`_☉
Luminosity	10,000 - 36,000^[6] `L`_☉
Temperature	2,750^[3] K

Database references
SIMBAD	data

See also

References