Omicron Serpentis

Short description: Star in the constellation Serpens

Omicron Serpentis

Location of ο Serpentis (circled in red)

Observation data
Equinox J2000.0]] (ICRS)
Constellation | Serpens
Right ascension |  17h 41m 24.87286s[1]
Declination | −12° 52′ 31.1086″[1]
Apparent magnitude (V) | 4.26[2]
Characteristics
Spectral type | A2 Va[3]
U−B color index | +0.08[2]
B−V color index | +0.07[2]
Variable type | δ Sct[4]
Astrometry
Radial velocity (Rv)| −30.2±1.2[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)| +0.760[6]
Details
Mass| 2.13[7] M☉
Radius| 2.2[8] R☉
Luminosity| 42.6[9] L☉
Surface gravity (log g)| 3.82±0.14[7] cgs
Temperature| 8,972±305[7] K
Rotational velocity (v sin i)| 112.6±1.2[10] km/s
Age| 518[7] Myr
Other designations

ο Ser, 56 Ser, BD−12°4808, FK5 3405, HD 160613, HIP 86565, HR 6581, SAO 160747.[11]

Database references
SIMBAD| data

Omicron Serpentis (ο Ser, ο Serpentis) is a solitary[12] star in the Serpens Cauda (tail) section of the equatorial constellation Serpens. Based upon an annual parallax shift of 18.83 mas as seen from Earth,[1] it is located around 173 light years from the Sun. The star is visible to the naked eye with a base apparent visual magnitude of +4.26.[2]

This is a white-hued A-type main sequence star with a stellar classification of A2 Va.[3] It is located on the lower instability strip[6] and is classified as a Delta Scuti type variable star. The apparent magnitude of the star varies in the range 4.26−4.27 with a period of 76 minutes, or 0.053 days.[6][13]

The star has an estimated 2.13[7] times the mass of the Sun and about 2.2[8] times the Sun's radius. It is about half a billion[7] years old and is spinning with a projected rotational velocity of 112.6 km/s.[10] Omicron Serpentis is radiating 42.6[9] times the solar luminosity from its photosphere at an effective temperature of 8,972 K.[7]

In 1909, the symbiotic nova[14] RT Serpentis appeared near Omicron, although it only reached a maximum magnitude of 10.[15]

## References

1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics 474 (2): 653–664, doi:10.1051/0004-6361:20078357, Bibcode: 2007A&A...474..653V.
2. ↑ 2.0 2.1 2.2 2.3 Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV Data (SIMBAD), Bibcode: 1986EgUBV........0M.
3. ↑ 3.0 3.1 Houk, N. (1988), Michigan catalogue of two-dimensional spectral types for the HD stars, 4, Ann Arbor: Dept. of Astronomy, University of Michigan, Bibcode: 1988mcts.book.....H.
4. ↑ Samus, N. N. et al. (2009), "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. ↑ de Bruijne, J. H. J.; Eilers, A.-C. (October 2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics 546: 14, doi:10.1051/0004-6361/201219219, A61, Bibcode: 2012A&A...546A..61D.
6. ↑ 6.0 6.1 6.2 Garcia, J. R. et al. (February 1995), "A catalogue of variable stars in the lower instability strip", Astronomy and Astrophysics Supplement 109: 201–262, Bibcode: 1995A&AS..109..201G.
7. ↑ 7.0 7.1 7.2 7.3 7.4 7.5 7.6 David, Trevor J.; Hillenbrand, Lynne A. (2015), "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets", The Astrophysical Journal 804 (2): 146, doi:10.1088/0004-637X/804/2/146, Bibcode: 2015ApJ...804..146D.
8. ↑ 8.0 8.1 Pasinetti Fracassini, L. E. et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy and Astrophysics 367 (2): 521–524, doi:10.1051/0004-6361:20000451, Bibcode: 2001A&A...367..521P.
9. ↑ 9.0 9.1 McDonald, I. et al. (2012), "Fundamental Parameters and Infrared Excesses of Hipparcos Stars", Monthly Notices of the Royal Astronomical Society 427 (1): 343–57, doi:10.1111/j.1365-2966.2012.21873.x, Bibcode: 2012MNRAS.427..343M.
10. ↑ 10.0 10.1 Díaz, C. G. et al. (July 2011), "Accurate stellar rotational velocities using the Fourier transform of the cross correlation maximum", Astronomy & Astrophysics 531: A143, doi:10.1051/0004-6361/201016386, Bibcode: 2011A&A...531A.143D.
11. ↑ "omi Ser". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=omi+Ser.
12. ↑ Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society 389 (2): 869–879, doi:10.1111/j.1365-2966.2008.13596.x, Bibcode: 2008MNRAS.389..869E.
13. ↑ Chang, S.-W. et al. (2013), "Statistical Properties of Galactic δ Scuti Stars: Revisited", The Astronomical Journal 145 (5): 132, doi:10.1088/0004-6256/145/5/132, Bibcode: 2013AJ....145..132C.
14. ↑ Pavlenko, E. P.; Bochkov, V. V.; Vasil'yanovskaya, O. P. (1996). "9,6-Year periodicity of symbiotic nova RT Ser (1909) during the outburst decay from 1940 to 1994". Astrophysics 39 (1): 15–19. doi:10.1007/BF02044949. Bibcode: 1996Ap.....39...15P.
15. ↑ "RT Serpentis". AAVSO Website. American Association of Variable Star Observers. 1 April 2014. http://www.aavso.org/vsx/index.php?view=detail.top&oid=34603.

* v
* t
* e

Serpens constellation

Stars
(list)|

| Bayer|

* α (Unukalhai)
* β (Chow)
* γ
* δ
* ε
* ζ
* η
* θ (Alya)
* ι
* κ (Gudja)
* λ
* μ
* ν
* ξ
* ο
* π
* ρ
* σ
* τ1
* τ2
* τ3
* τ4
* τ5
* τ6
* τ7
* τ8
* υ
* φ
* χ
* ψ
* ω

|

Flamsteed|

* 3
* 4
* 5
* 6
* 7
* 8
* 10
* 11 (A1)
* 14
* 16
* 25 (A2)
* 29
* 36 (b)
* 39
* 40
* 43
* 45
* 46
* 47
* 59 (d)
* 60 (c)
* 61
* 64
* 3 Her
* 3 Oph

Variable|

* R
* W
* X
* RT
* UZ
* VV
* VY
* WX
* AA
* AN
* AO
* AP
* AR
* AU
* BQ
* CT
* CV
* CW
* EG
* FH
* FI
* FK
* FL
* FQ
* FR
* LV
* LW
* LX
* MR
* MS
* MT
* MV
* MY
* NN
* NO
* NQ
* NW
* OO
* OU
* PS
* QV
* QX
* QY
* V382
* V411

HR|

* 5665
* 5690
* 5692
* 5706
* 5711
* 5740
* 5745
* 5783
* 5796
* 5831
* 5850
* 5859
* 5861
* 5874
* 5909
* 5913
* 5931
* 5992
* 6005
* 6011
* 6014
* 6016
* 6449
* 6496
* 6544
* 6562
* 6568
* 6600
* 6620
* 6666
* 6681
* 6755
* 6756
* 6757
* 6785
* 6830
* 6840
* 6843
* 6858
* 6890
* 6898
* 6928
* 6993 (e)
* 6999
* 7008
* 7048
* 7076
* 7144

HD|

* 135061
* 135615
* 136027
* 136118
* 138085
* 142245
* 143436
* 145936
* 146740
* 157969
* 168112
* 168443
* 168746 (Alasia)
* 175541

Gliese|

* Gliese 701
* Gliese 710
* GJ 1224

Other|

* ADS 9544
* AS 296
* COROT-9
* COROT-11
* COROT-23
* GX 17+2
* IRAS 18418-0440
* MWC 297
* MWC 922
* PG 1510+234
* PG 1605+072
* PSR B1534+11
* PSR J1719−1438
* Serpens FIRS 1
* Serpens SVS 20
* Serpens X-1

Star
clusters|

| Association|

* Serpens OB2

|

Open|

* IC 4756
* Messier 16
* NGC 6604
* NGC 6605
* Serpens South

Globular|

* Messier 5
* NGC 6535
* NGC 6539
* Palomar 5

Molecular
clouds|

* Serpens cloud

Nebulae|

| Dark|

* L134
* L183
* L483

|

H II|

* Eagle Nebula
* Sh2-54
* Westerhout 40

Planetary|

* Abell 41
* Red Square Nebula
* S68

Galaxies|

| NGC|

* 5887
* 5910
* 5911
* 5913
* 5919
* 5920
* 5921
* 5926
* 5928
* 5931
* 5936
* 5937
* 5940
* 5942
* 5941
* 5944
* 5951
* 5953
* 5954
* 5952
* 5956
* 5955
* 5957
* 5960
* 5962
* 5964
* 5970
* 5972
* 5975
* 5977
* 5980
* 5983
* 5984
* 5988
* 5991
* 5990
* 5994
* 5996
* 5997
* 6003
* 6004
* 6008
* 6006
* 6007
* 6009
* 6012
* 6010
* 6014
* 6020
* 6017
* 6018
* 6021
* 6022
* 6023
* 6027
* 6027a
* 6027b
* 6027c
* 6027d
* 6027e
* 6029
* 6033
* 6037
* 6036
* 6051
* 6063
* 6065
* 6066
* 6070
* 6080
* 6100
* 6118
* 6172

|

Other|

* Arp 72
* Arp 220
* 3C 317
* 3C 318
* 3C 321
* 3C 323.1
* 3C 324
* 3C 326
* 4C 11.50
* CGCG 049-033
* Hoag's Object
* IRAS 15107+0724
* NRAO 530
* PDS 456
* PG 1553+113
* PGC 54493
* PKS 1546+027

Galaxy
clusters|

* Abell 2040
* Abell 2052
* Abell 2063
* Abell 2107
* AWM 4
* MKW 3s
* Seyfert's Sextet

Other|

* GRB 970111
* GRB 050813
* GRB 060418
* GRB 060526
* SN 2004dk

0.00

(0 votes)

Original source: https://en.wikipedia.org/wiki/Omicron Serpentis. Read more

|

Retrieved from "https://handwiki.org/wiki/index.php?title=Astronomy:Omicron_Serpentis&oldid=4215614"
*[RA:]: Right Ascension
*[Dec.:]: Declination
*[v]: View this template
*[t]: Discuss this template
*[e]: Edit this template