astro.wikisort.org - Starι Serpentis, Latinized as Iota Serpentis and abbreviated Iot Ser, is a triple star[7] system in the constellation Serpens, in its head (Serpens Caput). It is approximately 190 light years from Earth.[1]
Star in the constellation Serpens
Iota Serpentis
Location of ι Serpentis (circled) |
Observation data Epoch J2000 Equinox J2000 |
Constellation |
Serpens |
Right ascension |
15h 41m 33.05469s[1] |
Declination |
19° 40′ 13.4380″[1] |
Apparent magnitude (V) |
4.51[2] |
Characteristics |
Evolutionary stage |
main sequence |
Spectral type |
B9V + A1V[3] |
B−V color index |
+0.062±0.003[2] |
Astrometry |
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|
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Radial velocity (Rv) | −17.20[4] km/s |
Proper motion (μ) | RA: -60.86[1] mas/yr Dec.: -43.69[1] mas/yr |
Parallax (π) | 17.16 ± 0.67 mas[1] |
Distance | 190 ± 7 ly (58 ± 2 pc) |
Absolute magnitude (MV) | +0.69[2] |
|
Orbit[5] |
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Period (P) | 8015.0±6.3 d |
Semi-major axis (a) | 0.21033±0.00047″ |
Eccentricity (e) | 0.0941±0.0028 |
Inclination (i) | 83.608±0.043° |
Longitude of the node (Ω) | 69.684±0.033° |
Periastron epoch (T) | 54,180±33 HMJD |
Argument of periastron (ω) (secondary) | 80.5±1.8° |
Details |
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A |
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Mass | 1.999[3] M☉ |
B |
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Mass | 1.984[3] M☉ |
Other designations |
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Database references |
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SIMBAD | data |
At the centre of the system is a spectroscopic binary, Iota Serpentis A and B. These are both white main sequence dwarfs and both have apparent magnitudes of +5.3. This binary has an orbital period variously reported as 11[8] or 22[5] years. First discovered as an astrometric binary, the pair have now been resolved and visual orbits have been derived.[5]
There are two visual companions, Iota Serpentis C, a 13th magnitude star 143 arcseconds away and Iota Serpentis D, a 12th magnitude star 151 arcseconds distant.
References
- 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. S2CID 18759600. Vizier catalog entry
- Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015, S2CID 119257644.
- Martin, C.; et al. (1998). "Mass determination of astrometric binaries with Hipparcos. III. New results for 28 systems". Astronomy and Astrophysics Supplement. 133 (2): 149. Bibcode:1998A&AS..133..149M. doi:10.1051/aas:1998459.
- Evans, D. S. (June 20–24, 1966). "The Revision of the General Catalogue of Radial Velocities". In Batten, Alan Henry; Heard, John Frederick (eds.). Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30. Vol. 30. University of Toronto: International Astronomical Union. p. 57. Bibcode:1967IAUS...30...57E.
- Muterspaugh, Matthew W.; et al. (2010). "The Phases Differential Astrometry Data Archive. II. Updated Binary Star Orbits and a Long Period Eclipsing Binary". The Astronomical Journal. 140 (6): 1623–1630. arXiv:1010.4043. Bibcode:2010AJ....140.1623M. doi:10.1088/0004-6256/140/6/1623. S2CID 6030289.
- "iot Ser". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-09-09.
- 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, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x, S2CID 14878976.
- van den Bos, W. H. (1965). "Note on the Double Star Iota Serpentis". Monthly Notes of the Astronomical Society of Southern Africa. 24: 123. Bibcode:1965MNSSA..24..123V.
Serpens constellation |
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Stars (list) | |
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Star clusters | |
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Molecular clouds | |
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Nebulae | |
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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
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Other | |
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Galaxy clusters | |
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Other |
- GRB 970111
- GRB 050813
- GRB 060418
- GRB 060526
- SN 2004dk
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