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] cgs |
| 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 (abbreviated 11 Aqr) is a sunlike star (G1V) in the constellation of Aquarius with an apparent magnitude is 6.22. 11 Aquarii is the Flamsteed designation. 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
- 1 2 3 4 5 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. - 1 2 3 4 5 6 7 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
- 1 2 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
- 1 2 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
- 1 2 3 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, arXiv:0805.4826, 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, doi:10.1093/pasj/57.1.13
External links
- "Simbad query". Retrieved September 28, 2009.
- "TCAEP". Retrieved September 28, 2009.
- "11 Aqr, Space Geody". Retrieved September 28, 2009.
- "G stars within 100 light-years". Retrieved September 28, 2009.
- "Nearby Stars Online Spectra". Retrieved September 28, 2009.
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