Kappa Serpentis

Kappa Serpentis

Observation data Epoch J2000      Equinox J2000
Constellation	Serpens
Right ascension	15^h 48^m 44.37676^s [1]
Declination	18° 08′ 29.6342″ [1]
Apparent magnitude (V)	4.09 [2]
Characteristics
Spectral type	M0.5III [3]
U−B color index	+1.95 [2]
B−V color index	+1.62 [2]
Astrometry
Radial velocity (Rv)	-38.48[4] km/s
Proper motion (μ)	RA: -51.88[1] mas/yr Dec.: -88.10[1] mas/yr
Parallax (π)	8.54 ± 0.23[1] mas
Distance	380 ± 10 ly (117 ± 3 pc)
Absolute magnitude (MV)	-1.25 [5]
Other designations
35 Serpentis, FK5 584, GC 21255, HIP 77450, HR 5879, HD 141477, SAO 101752 [3]
Database references
SIMBAD	data

Kappa Serpentis (κ Ser, κ Serpentis) is a star in the constellation Serpens, in its head (Serpens Caput). It is a red M-type giant^[3] with an apparent magnitude of +4.09.^[2] It is approximately 382 light years from Earth.^[1]

References

1. van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Vizier catalog entry
2. Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues. 2237: 0. Bibcode:2002yCat.2237....0D.
3. "Kappa Serpentis". SIMBAD Astronomical Database. Retrieved 2015-10-17.
4. Famaey, B.; Pourbaix, D.; Frankowski, A.; Van Eck, S.; Mayor, M.; Udry, S.; Jorissen, A. (2009). "Spectroscopic binaries among Hipparcos M giants,. I. Data, orbits, and intrinsic variations". Astronomy and Astrophysics. 498 (2): 627–640. arXiv:0901.0934. Bibcode:2009A&A...498..627F. doi:10.1051/0004-6361/200810698.
5. Absolute magnitude calculated as $M = m + 5 (1 + \log_{10}{p})\!\,$, where $M$ is the star's absolute magnitude, $m$ is the star's apparent magnitude, and $p$ is the star's measured parallax in arcseconds.