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
Distance 240 ± 20 ly
(73 ± 6 pc)
Rotational velocity (v sin i) 70[5] km/s
Other designations
i2 Aquarii, BD–19 6506, HD 223024, HIP 117218, HR 9002, SAO 165867, WDS J23460-1841.[6]
Data sources:
Hipparcos Catalogue,
CCDM (2002),
Bright Star Catalogue (5th rev. ed.)

107 Aquarii ( i2 Aquarii) is the Flamsteed designation for a double star in the equatorial constellation of Aquarius. 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:0708.1752, 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:0806.2878, 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/0610785, Bibcode:2007A&A...463..671R, doi:10.1051/0004-6361:20065224. 
  6. ^ "CCDM J23460-1841AB -- Double or multiple star", SIMBAD Astronomical Object Database, retrieved 2007-07-14 

External links[edit]