107 Aquarii

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107 Aquarii
Observation data
Epoch J2000.0 (ICRS)      Equinox J2000.0 (ICRS)
Constellation Aquarius
Right ascension 23h 46m 00.92254s[1]
Declination –18° 40′ 42.0313″[1]
Apparent magnitude (V) +5.305[2] (5.72/6.72)[3]
Spectral type F2 III + F2 V[3]
U−B color index +0.141[2]
B−V color index +0.287[2]
Radial velocity (Rv)–1.8[4] km/s
Proper motion (μ) RA: +130.33[1] mas/yr
Dec.: +10.84[1] mas/yr
Parallax (π)13.66 ± 1.05 mas
Distance240 ± 20 ly
(73 ± 6 pc)
Rotational velocity (v sin i)70[5] km/s
Other designations
BD–19 6506, HD 223024, HIP 117218, HR 9002, SAO 165867, WDS J23460-1841.[6]
Database references

107 Aquarii (abbreviated 107 Aqr) is a double star in the equatorial constellation of Aquarius. 107 Aquarii is the Flamsteed designation, although it also bears the Bayer designation i2 Aquarii. The pair have an angular separation of 6.787 arcseconds.[3] They have a combined apparent visual magnitude of +5.305,[2] with individual magnitudes of 5.72 and 6.72.[3] The annual parallax shift is 13.66 milliarcseconds with an 8% margin of error.[1] This indicates the system is at a distance of around 240 light-years (74 parsecs) from Earth.


  1. ^ a b c d e van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752Freely accessible, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357. 
  2. ^ a b c d Rakos, K. D.; et al. (February 1982), "Photometric and astrometric observations of close visual binaries", Astronomy and Astrophysics Supplement Series, 47: 221–235, Bibcode:1982A&AS...47..221R 
  3. ^ a b c d 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:0806.2878Freely accessible, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x. 
  4. ^ Wilson, R. E. (1953), General Catalogue of Stellar Radial Velocities, Carnegie Institute of Washington D.C., Bibcode:1953GCRV..C......0W. 
  5. ^ Royer, F.; Zorec, J.; Gómez, A. E. (February 2007), "Rotational velocities of A-type stars. III. Velocity distributions", Astronomy and Astrophysics, 463 (2): 671–682, arXiv:astro-ph/0610785Freely accessible, Bibcode:2007A&A...463..671R, doi:10.1051/0004-6361:20065224. 
  6. ^ "* i02 Aqr". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2007-07-14. 

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