Omicron Serpentis

ο Serpentis

Location of ο Serpentis (circled)
Observation data Epoch J2000      Equinox J2000
Constellation	Serpens
Right ascension	17^h 41^m 24.87286^s [1]
Declination	−12° 52′ 31.1086″ [1]
Apparent magnitude (V)	4.24 [2]
Characteristics
Spectral type	A2Va [3]
B−V color index	+0.09 [2]
Variable type	δ Sct[4]
Astrometry
Radial velocity (Rv)	-30.20[5] km/s
Proper motion (μ)	RA: -72.90[1] mas/yr Dec.: -55.55[1] mas/yr
Parallax (π)	18.83 ± 0.25[1] mas
Distance	173 ± 2 ly (53.1 ± 0.7 pc)
Absolute magnitude (MV)	0.62 [6]
Other designations
56 Serpentis, FK5 3405, GC 23978, HIP 86565, HR 6581, HD 160613, SAO 160747 [2]
Database references
SIMBAD	data

Omicron Serpentis (ο Ser, ο Serpentis) is a star in the constellation Serpens.

Omicron Serpentis is a white A-type main sequence dwarf with an apparent magnitude of +4.24. It is approximately 173 light years from Earth.^[1] It is classified as a Delta Scuti type variable star and its apparent magnitude varies by 0.01 with a period of 76 minutes.^[7]

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. "Omicron Serpentis". SIMBAD Astronomical Database. Retrieved 2015-10-17.
3. Houk, N. (1988), Michigan catalogue of two-dimensional spectral types for the HD stars 4, Ann Arbor: Dept. of Astronomy, University of Michigan, Bibcode:1988MSS...C04....0H
4. Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/gcvs. Originally published in: 2009yCat....102025S 1. Bibcode:2009yCat....102025S.
5. Gontcharov, G. A. (November 2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters 32 (11): 759–771. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065.
6. 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.
7. Chang, S.-W.; Protopapas, P.; Kim, D.-W.; Byun, Y.-I. (2013). "Statistical Properties of Galactic δ Scuti Stars: Revisited". The Astronomical Journal 145 (5). arXiv:1303.1031. Bibcode:2013AJ....145..132C. doi:10.1088/0004-6256/145/5/132. Vizier catalog entry