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'''{{CelestialRefBack|HD 133600|link=no|bib=show|plot=20|siblings=show|ids=show|cds=short|bwimage=show|image=show}}''', also known as HIP 73815, is a ] ] in the ] of ].<ref name=sb0 /> It has an ] of approximately 8.219.<ref name=sb0 /> It is very similar to the Sun and has been called a ].<ref>Accurate abundance patterns of solar twins and analogs. Does the anomalous solar chemical composition come from planet formation?, I. Ramírez, J. Meléndez, and M. Asplund, ''Astronomy and Astrophysics'' '''508''', #1 (December 2009), {{doi|10.1051/0004-6361/200913038}}, {{bibcode|2009A&A...508L..17R}}.</ref> | ||
| It's distance is 52.3 parsecs. Mass is within 3 percent of the sun. <ref name=Melendez>[http://iopscience.iop.org/1538-4357/669/2/L89/pdf/1538-4357_669_2_L89.pdf HIP 56948: A SOLAR TWIN WITH A LOW LITHIUM ABUNDANCE , Jorge Melendez and Ivan Ramırezd, ''The Astrophysical Journal'', '''669''': L89–L92, 2007 November 10. (also discusses HIP 73815, compares it with HIP 56948)</ref> | It's distance is 52.3 parsecs. Mass is within 3 percent of the sun. <ref name=Melendez>[http://iopscience.iop.org/1538-4357/669/2/L89/pdf/1538-4357_669_2_L89.pdf HIP 56948: A SOLAR TWIN WITH A LOW LITHIUM ABUNDANCE , Jorge Melendez and Ivan Ramırezd, ''The Astrophysical Journal'', '''669''': L89–L92, 2007 November 10. (also discusses HIP 73815, compares it with HIP 56948)</ref> | ||
Revision as of 09:16, 21 July 2013
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Virgo |
| Right ascension | 15 05 13.2488 |
| Declination | +06° 17′ 23.676″ |
| Apparent magnitude (V) | 8.219 |
| Characteristics | |
| Spectral type | G0 |
| B−V color index | 0.6 |
| V−R color index | 0.4 |
| R−I color index | 0.2 |
| Astrometry | |
| Proper motion (μ) | RA: −2.40 mas/yr Dec.: −248.01 mas/yr |
| Parallax (π) | 19.12 ± 1.11 mas |
| Distance | 171 ± 10 ly (52 ± 3 pc) |
| Absolute magnitude (MV) | 4.6 |
| Other designations | |
| BD+06 2987, GC 20290, HIP 73815, LTT 14484, NLTT 39253, PPM 161240, SAO 120828. | |
| Database references | |
| SIMBAD | data |
Template:CelestialRefBack, also known as HIP 73815, is a G-type star in the constellation of Virgo. It has an apparent visual magnitude of approximately 8.219. It is very similar to the Sun and has been called a solar twin.
It's distance is 52.3 parsecs. Mass is within 3 percent of the sun.
Solar twins can help us to understand solar activity such as flares and sunspot cycles over longer time periods than the historical records, and to put unique historical events such as the Maunder minimum in context. They can also be used to set the zero point of fundamental calibrations in astrophysics, and models of solar evolution.
Solar twins can also help answer whether the sun is unique or not. It used to be thought that the sun might be unique for its low lithium abundance. This star was one of two stars that were used in 2007 papers by Melendez & Ramırez .to show that the sun was not unique in this respect as it has lithium abundance similar to our sun. This has made it a useful star for studies into the problem of the depleted lithium abundance at the solar surface compared with other stars, something that is not yet fully understood, and known as the Lithium depeletion problem.
References
- ^ LTT 14484 -- High proper-motion Star, database entry, SIMBAD. Accessed on line February 3, 2011.
- From apparent magnitude and parallax.
- Accurate abundance patterns of solar twins and analogs. Does the anomalous solar chemical composition come from planet formation?, I. Ramírez, J. Meléndez, and M. Asplund, Astronomy and Astrophysics 508, #1 (December 2009), doi:10.1051/0004-6361/200913038, Bibcode:2009A&A...508L..17R.
- ^ [http://iopscience.iop.org/1538-4357/669/2/L89/pdf/1538-4357_669_2_L89.pdf HIP 56948: A SOLAR TWIN WITH A LOW LITHIUM ABUNDANCE , Jorge Melendez and Ivan Ramırezd, The Astrophysical Journal, 669: L89–L92, 2007 November 10. (also discusses HIP 73815, compares it with HIP 56948)