107 Aquarii

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.

This article is about i2 Aquarii. For other star systems with this Bayer designation, see i Aquarii.
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]
Characteristics
Spectral type F2 III + F2 V[3]
U−B color index +0.141[2]
B−V color index +0.287[2]
Astrometry
Radial velocity (Rv)–0.70[4] km/s
Absolute magnitude (MV)+0.97[4]
A
Proper motion (μ) RA: +132.908[5] mas/yr
Dec.: +16.011[5] mas/yr
Parallax (π)16.1378 ± 0.2169 mas
Distance202 ± 3 ly
(62.0 ± 0.8 pc)
B
Proper motion (μ) RA: +139.256[6] mas/yr
Dec.: +10.050[6] mas/yr
Parallax (π)20.0193 ± 0.3991 mas
Distance163 ± 3 ly
(50.0 ± 1.0 pc)
Details
A
Radius2.43[5] R☉
Luminosity16.647[5] L☉
Temperature7,482[5] K
Rotational velocity (v sin i)70[7] km/s
B
Radius1.47[6] R☉
Luminosity4.421[6] L☉
Temperature6,889[6] K
Other designations
BD–19 6506, HD 223024, HIP 117218, HR 9002, SAO 165867, WDS J23460-1841[8]
Database references
SIMBADdata

References
  1. 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. 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. 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. 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
  5. Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  6. Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  7. 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.
  8. "* i02 Aqr". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2007-07-14.
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