62 Sagittarii

62 Sagittarii

Observation data Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation	Sagittarius
Right ascension	20^h 02^m 39.4805^s[1]
Declination	−27° 42′ 35.441″[1]
Apparent magnitude (V)	4.45 to 4.64[2]
Characteristics
Spectral type	M4III[1]
U−B color index	+1.80[3]
B−V color index	+1.65[3]
R−I color index	+1.56[3]
Variable type	LB[2]
Astrometry
Radial velocity (Rv)	9.9 ± 0.9[1] km/s
Proper motion (μ)	RA: 32.28[1] mas/yr Dec.: 14.35[1] mas/yr
Parallax (π)	7.28 ± 0.74[1] mas
Distance	approx. 450 ly (approx. 140 pc)
Absolute magnitude (MV)	−1.1[4]
Details
Radius	70[5] R☉
Other designations
62 Sgr, c Sagittarii, c Sgr, V3872 Sagittarii, V3872 Sgr, CD−28 16355, CPD−28 7105, FK5 753, GC 27763, HD 189763, HIP 98688, HR 7650, PPM 270603, SAO 188844.[1]
Database references
SIMBAD	data

62 Sagittarii (62 Sgr) or c Sagittarii (c Sgr) is an M-type giant star in the constellation of Sagittarius.^[1] It is the southwest corner of the asterism called the Terebellum. It is an irregular variable whose apparent visual magnitude varies between 4.45 and 4.64,^[2] and, at its brightest, it is the brightest of the four stars in the Terebellum. It is approximately 450 light-years from Earth.^[1] 62 Sagittarii is the star in the Terebellum which is most distant from its centre; it is 1.72° from its northwest corner, 60 Sagittarii, and 1.37° from its southeast corner, 59 Sagittarii.

References

1. V* V3872 Sgr -- Pulsating variable Star, database entry, SIMBAD. Accessed on line November 19, 2009.
2. V3872 Sgr, database entry, The combined table of GCVS Vols I-III and NL 67-78 with improved coordinates, General Catalogue of Variable Stars, Sternberg Astronomical Institute, Moscow, Russia. Accessed on line November 19, 2009.
3. HR 7650, database entry, The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version), D. Hoffleit and W. H. Warren, Jr., CDS ID V/50. Accessed on line November 19, 2009.
4. From apparent magnitude and parallax.
5. HD 189763, database entry, Catalog of Apparent Diameters and Absolute Radii of Stars (CADARS), 3rd edition, L. E. Pasinetti-Fracassini, L. Pastori, S. Covino, and A. Pozzi, CDS ID II/224. Accessed on line November 19, 2009.