S Ursae Minoris

S Ursae Minoris
	; The visual band light curve of S Ursae Minoris, from AAVSO data
Observation data; Epoch J2000 Equinox J2000
Constellation	Ursa Minor
Right ascension	15h 29m 34.5775s
Declination	+78° 38′ 00.2742″
Apparent magnitude (V)	7.5-<13.2
Characteristics
Spectral type	M6e-M9e
Variable type	long period variable
Astrometry
Proper motion (μ)	RA: −30.986±0.303 mas/yr ; Dec.: 7.006±0.309 mas/yr
Parallax (π)	2.5455 ± 0.1578 mas
Distance	1,280 ± 80 ly ; (390 ± 20 pc)
Other designations
	S UMi, HD 139492, HIP 75847
Database references
SIMBAD	data

S Ursae Minoris (S UMi) is a long period variable star in the constellation Ursa Minor, ranging from magnitude 7.5 to fainter than 13.2 over a period of 331 days.^[3]

References

^ "Download Data". aavso.org. AAVSO. Retrieved 1 October 2021.
^ ^a ^b ^c ^d ^e 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 ^d Watson, Christopher (4 January 2010). "S Ursae Minoris". AAVSO Website. American Association of Variable Star Observers. Retrieved 10 March 2015.
^ "S UMi". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-10-10.

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[aavso-1] "Download Data". aavso.org. AAVSO. Retrieved 1 October 2021.

[Gaia_DR2-2] 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.

[AAVSOs-3] Watson, Christopher (4 January 2010). "S Ursae Minoris". AAVSO Website. American Association of Variable Star Observers. Retrieved 10 March 2015.

[Simbad-4] "S UMi". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-10-10.

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Observation data Epoch J2000 Equinox J2000
The visual band light curve of S Ursae Minoris, from AAVSO data^[1]
Constellation	Ursa Minor
Right ascension	15^h 29^m 34.5775^s^[2]
Declination	+78° 38′ 00.2742″^[2]
Apparent magnitude (V)	7.5-<13.2^[3]
Characteristics
Spectral type	M6e-M9e^[3]
Variable type	long period variable^[3]
Astrometry

Proper motion (μ)	RA: −30.986±0.303^[2] mas/yr Dec.: 7.006±0.309^[2] mas/yr
Parallax (π)	2.5455 ± 0.1578 mas^[2]
Distance	1,280 ± 80 ly (390 ± 20 pc)

Other designations
S UMi, HD 139492, HIP 75847^[4]
Database references
SIMBAD	data