User:21.Andromedae/S Serpentis

21.Andromedae/S Serpentis
Observation data; Epoch J2000 Equinox J2000
Constellation	Serpens
Right ascension	15h 21m 39.53s
Declination	+14h 18m 53.09s
Apparent magnitude (V)	7.5 – 14
Characteristics
Evolutionary stage	Red giant
Spectral type	M5e–M6e
Variable type	Mira variable
Astrometry
Details
Radius	583±172 – 601±159 R☉
Other designations
Database references

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S Serpentis is a red giant star and a Mira variable located in the constellation Serpens.

The distance to S Serpentis has been measured using radio astrometry by the VERA project. The parallax of 1.25 arcseconds give a distance of exactly 800 parsecs, or 2,610 light-years, with an uncertainty of 3%.^[1]

The apparent magnitude of S Serpentis vary between 7.5 and 14 across a period of 370.4 days, a range of 400 times in brightness. It was first discovered to be variable in 1828 by Karl Harding.^[2]

Characteristics

S Serpentis has a radius of 583 or 601 R_☉. ^[3] The angular diameter of the star is measured at 5.53±0.42 mas.^[3]

Notes

References

^ VERA Collaboration; Hirota, Tomoya; Nagayama, Takumi; Honma, Mareki; Adachi, Yuuki; Burns, Ross A.; Chibueze, James O.; Choi, Yoon Kyung; Hachisuka, Kazuya; Hada, Kazuhiro; Hagiwara, Yoshiaki; Hamada, Shota; Handa, Toshihiro; Hashimoto, Mao; Hirano, Ken (2020-08-01). "The First VERA Astrometry Catalog". Publications of the Astronomical Society of Japan. 72: 50. doi:10.1093/pasj/psaa018. ISSN 0004-6264.
^ "VSX : Detail for S Ser". www.aavso.org. Retrieved 2024-04-21.
^ ^a ^b van Belle, G. T.; Thompson, R. R.; Creech-Eakman, M. J. (2002-09). "Angular Size Measurements Of Mira Variable Stars At 2.2 Microns. II". The Astronomical Journal. 124 (3): 1706–1715. doi:10.1086/342282. {{cite journal}}: Check date values in: |date= (help)

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[1] VERA Collaboration; Hirota, Tomoya; Nagayama, Takumi; Honma, Mareki; Adachi, Yuuki; Burns, Ross A.; Chibueze, James O.; Choi, Yoon Kyung; Hachisuka, Kazuya; Hada, Kazuhiro; Hagiwara, Yoshiaki; Hamada, Shota; Handa, Toshihiro; Hashimoto, Mao; Hirano, Ken (2020-08-01). "The First VERA Astrometry Catalog". Publications of the Astronomical Society of Japan. 72: 50. doi:10.1093/pasj/psaa018. ISSN 0004-6264.

[aavso-2] "VSX : Detail for S Ser". www.aavso.org. Retrieved 2024-04-21.

[:1-3] van Belle, G. T.; Thompson, R. R.; Creech-Eakman, M. J. (2002-09). "Angular Size Measurements Of Mira Variable Stars At 2.2 Microns. II". The Astronomical Journal. 124 (3): 1706–1715. doi:10.1086/342282. {{cite journal}}: Check date values in: |date= (help)

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