11 Aquarii
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11 Aquarii
| Observation data Epoch J2000 Equinox J2000 |
|
|---|---|
| Constellation | Aquarius |
| Right ascension | 21h 00m 33.84082s[1] |
| Declination | –04° 43′ 48.9421″[1] |
| Apparent magnitude (V) | 6.216[2] |
| Characteristics | |
| Spectral type | G1 V[3] |
| U−B color index | +0.22[4] |
| B−V color index | +0.63[4] |
| Astrometry | |
| Radial velocity (Rv) | -17.8 ± 2[2] km/s |
| Proper motion (μ) | RA: 48.78[1] mas/yr Dec.: –138.84[1] mas/yr |
| Parallax (π) | 37.80 ± 1.01[1] mas |
| Distance | 86 ± 2 ly (26.5 ± 0.7 pc) |
| Absolute magnitude (MV) | 4.10[2] |
| Details | |
| Mass | 1.12+0.03 −0.09[2] M☉ |
| Radius | 1.30[5] R☉ |
| Surface gravity (log g) | 4.39[6] |
| Temperature | 5,973[6] K |
| Metallicity [Fe/H] | 0.11[2]–0.28[6] dex |
| Rotational velocity (v sin i) | 5[7] km/s |
| Age | 4.7[2] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
11 Aquarii is a sunlike star (G1V) in the constellation Aquarius with an apparent magnitude is 6.22. It is approximately 86 ly from Earth and is a main-sequence star of spectral type G1 and luminosity class V. Compared to the Sun, this star has a higher abundance of elements more massive than helium. This indicates it belongs to a class of stars called metal-rich. The star is about the same age as the Sun, but it has slightly more mass and has a larger radius.[2][5]
References
- ^ a b c d e van Leeuwen, Floor (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics 474 (2): 653–664, arXiv:0708.1752v1, Bibcode 2007A&A...474..653V, doi:10.1051/0004-6361:20078357 Note: see VizieR catalogue I/311.
- ^ a b c d e f g Nordström, B. et al. (May 2004), "The Geneva-Copenhagen survey of the Solar neighbourhood. Ages, metallicities, and kinematic properties of ˜14 000 F and G dwarfs", Astronomy and Astrophysics 418: 989–1019, arXiv:astro-ph/0405198, Bibcode 2004A&A...418..989N, doi:10.1051/0004-6361:20035959
- ^ Buscombe, W. (1962), "Spectral classification of Southern fundamental stars", Mount Stromlo Observatory Mimeogram 4, Bibcode 1962MtSOM...4....1B
- ^ a b Cousins, A. W. J. (1964), "Photometric Data for Stars in the Equatorial Zone (Seventh List)", Monthly Notes of the Astronomical Society of Southern Africa 23: 175, Bibcode 1964MNSSA..23..175C
- ^ a b Takeda, Genya et al. (February 2007), "Structure and Evolution of Nearby Stars with Planets. II. Physical Properties of ~1000 Cool Stars from the SPOCS Catalog", The Astrophysical Journal Supplement Series 168 (2): 297–318, arXiv:astro-ph/0607235, Bibcode 2007ApJS..168..297T, doi:10.1086/509763
- ^ a b c Sousa, S. G. et al. (August 2007), "Spectroscopic parameters for 451 stars in the HARPS GTO planet search program. Stellar [Fe/H] and the frequency of exo-Neptunes", Astronomy and Astrophysics 487 (1): 373–381, Bibcode 2008A&A...487..373S, doi:10.1051/0004-6361:200809698
- ^ Takeda, Yoichi et al. (February 2005), "High-Dispersion Spectra Collection of Nearby F--K Stars at Okayama Astrophysical Observatory: A Basis for Spectroscopic Abundance Standards", Publications of the Astronomical Society of Japan 57 (1): 13–25, Bibcode 2005PASJ...57...13T
External links
- "Simbad query". http://simbad.u-strasbg.fr/simbad/sim-id?Ident=@1340361&Name=*++11+Aqr&submit=display+all+measurements. Retrieved September 28, 2009.
- "TCAEP". http://www.scenta.co.uk/tcaep/nonxml/astronomy/constellations/21000109.htm. Retrieved September 28, 2009.
- "11 Aqr, Space Geody". http://www.geody.com/geospot.php?world=space&ufi=103682&alc=11q. Retrieved September 28, 2009.
- "G stars within 100 light-years". http://www.solstation.com/stars3/100-gs.htm. Retrieved September 28, 2009.
- "Nearby Stars Online Spectra". http://stellar.phys.appstate.edu/cgi-bin/spectra/specdisplay.pl?starname=HD199960. Retrieved September 28, 2009.
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