| 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 |
| Distance | 202 ± 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 |
| Distance | 163 ± 3 ly (50.0 ± 1.0 pc) |
| Details | |
| A | |
| Radius | 2.43[5] R☉ |
| Luminosity | 16.647[5] L☉ |
| Temperature | 7,482[5] K |
| Rotational velocity (v sin i) | 70[7] km/s |
| B | |
| Radius | 1.47[6] R☉ |
| Luminosity | 4.421[6] L☉ |
| Temperature | 6,889[6] K |
| Other designations | |
| Database references | |
| SIMBAD | data |
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.
References
- ^ a b c 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.
- ^ 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
- ^ 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.
- ^ a b 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
- ^ a b c d e 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.
- ^ a b c d e 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.
- ^ 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.
- ^ "* i02 Aqr". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2007-07-14.