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: 48.856 mas/yr Dec.: –137.781 mas/yr |
| Parallax (π) | 36.8541±0.0570 mas[1] |
| Distance | 88.5 ± 0.1 ly (27.13 ± 0.04 pc) |
| Absolute magnitude (MV) | 4.10[2] |
| Details | |
| Mass | 1.20±0.01[5] M☉ |
| Radius | 1.30[6] R☉ |
| Luminosity | 2.24[7] L☉ |
| Surface gravity (log g) | 4.32±0.02[5] cgs |
| Temperature | 5,967±7[5] K |
| Metallicity [Fe/H] | +0.273±0.006[5] dex |
| Rotational velocity (v sin i) | 5[8] km/s |
| Age | 3.70+0.09 −0.14[5] Gyr |
| Other designations | |
| 11 Aqr, BD−05°5433, HD 199960, HIP 103682, HR 8041, SAO 145022[9] | |
| Database references | |
| SIMBAD | data |
11 Aquarii is a sun-like star in the zodiac constellation of Aquarius, located 88.5 light years away from the Sun. 11 Aquarii is the Flamsteed designation. It is difficult to see with the naked eye, appearing as a dim, yellow-hued star with an apparent visual magnitude of 6.22.[2] This body is moving closer to the Earth with a heliocentric radial velocity of −17.8 km/s,[2] and is expected to come as close as 65.1 ly in 700,000 years.[7]
It is a G-type main-sequence star with a stellar classification of G1 V.[3] 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 3.7 billion years old, it has 1.20 times the mass[5] and 1.30 times the radius of the Sun.[2][6] It is radiating 2.24 times the luminosity of the Sun from its photosphere[7] at an effective temperature of 5,944 K.[5]
References
[edit]- ^ a b c 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 f 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 (3): 989–1019, arXiv:astro-ph/0405198, Bibcode:2004A&A...418..989N, doi:10.1051/0004-6361:20035959, S2CID 11027621
- ^ a b Buscombe, W. (1962), "Spectral classification of Southern fundamental stars", Mount Stromlo Observatory Mimeogram, 4: 1, 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 c d e f g Carvalho-Silva, Gabriela; Meléndez, Jorge; Rathsam, Anne; Shejeelammal, J.; Martos, Giulia; Lorenzo-Oliveira, Diego; Spina, Lorenzo; Ribeiro Alves, Débora (April 2025), "A New Age–Activity Relation For Solar Analogs that Accounts for Metallicity", The Astrophysical Journal Letters, 983 (2): L31, Bibcode:2025ApJ...983L..31C, doi:10.3847/2041-8213/adc382, ISSN 2041-8205
- ^ 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, S2CID 18775378
- ^ a b c 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, S2CID 119257644
- ^ 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
- ^ "10 Aqr". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved April 27, 2019.
External links
[edit]- "Simbad query". Retrieved September 28, 2009.
- "TCAEP". Archived from the original on April 21, 2013. 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". Archived from the original on July 17, 2011. Retrieved September 28, 2009.
