HD 138573 (also known as HIP 76114 ) is the star of the northern constellation of the Snake . Having a visible magnitude of 7.215 m [1] , the star is not visible to the naked eye . It is located 101 light-years (31 pc ) from Earth [1] . According to a 2005 study, HD 138573, although it is a type G star, like our Sun , it is still not a solar twin, as it has a much lower mass, lower metallicity , and a much larger age than the Sun at 5. 6 billion years. HD 138573 , therefore, is close in its characteristics to the Sun and can be classified as an analogue of the Sun.
| HD 138573 | |||
|---|---|---|---|
| Star | |||
  | |||
| Observational data ( Age J2000.0 ) | |||
| Type of | Single star | ||
| Right ascension | |||
| Declination | |||
| Distance | 101 St. year (31 pc ) [1] | ||
| Visible magnitude ( V ) | 7.215 [1] | ||
| Constellation | Snake | ||
| Specifications | |||
| Spectral class | G5IV-V [1] | ||
| Color Index ( B - V ) | 0.413 [1] | ||
| physical characteristics | |||
| Age | 5.6 Billion [2] years | ||
| Temperature | 5689 [3] K | ||
| Metallicity | 93.3 [3] | ||
| The properties | Analogue of the sun | ||
| |||
| Database Information | |||
| SIMBAD | data | ||
Comparison with the Sun
The table below shows the parameters for comparing the Sun and HD 138573 .
| Title | J2000 coordinates | Distance (light) | Spectral the class | Temperature (K) | Metallicity (%) | Age (Billion years) | Notes | |
|---|---|---|---|---|---|---|---|---|
| Right ascension | Declination | |||||||
| The sun | - | - | 0.00 | G2v | 5,778 | 100 | 4.6 | [four] |
| HD 138573 [5] | 15 h 32 m 43.7 s | + 10 ° 58 ′ 06 ″ | 101 | G5IV-V | 5,689 | 93.3 | 5.6 | [5] [2] [6] |
To date, no solar twin has been found with an exact correspondence of all parameters, however, there are some stars that are very close in their parameters to solar. An exact solar twin would be a star of spectral class G2V with a temperature of 5.778 K , an age of 4.6 billion years and luminosity variations not exceeding 0.1% of the solar . [7] [8] [9] [10]
See also
- HD 192699
- HD 210702
Notes
- ↑ 1 2 3 4 5 6 7 8 138573 - High proper-motion Star , database entry, SIMBAD . (eng.)
- ↑ 1 2 King, Jeremy R .; Boesgaard, Ann M .; Schuler, Simon C. Keck HIRES Spectroscopy of Four Candidate Solar Twins (Eng.) // The Astronomical Journal : journal. - IOP Publishing , 2005 .-- November ( vol. 130 , no. 5 ). - P. 2318-2325 . - DOI : 10.1086 / 452640 . - . - arXiv : astro-ph / 0508004 .
- ↑ 1 2 New solar twins and the metallicity and temperature scales of the Geneva Copenhagen Survey ⋆ . arxiv. Date of treatment June 23, 2016.
- ↑ Williams, DR Sun Fact Sheet . NASA (2004).
- ↑ 1 2 Porto de Mello, GF; da Silva, R .; da Silva, L .; de Nader, RV A photometric and spectroscopic survey of solar twin stars within 50 parsecs of the Sun; I. Atmospheric parameters and color similarity to the Sun // Astronomy and Astrophysics : journal. - EDP Sciences 2014 .-- March ( vol. 563 ). - P. A52 . - DOI : 10.1051 / 0004-6361 / 201322277 . - . - arXiv : 1312.7571 .
- ↑ HD 138573 . simbad (2004).
- ↑ NASA, Science News, Solar Variability and Terrestrial Climate, Jan. 8th, 2013
- ↑ University of Nebraska-Lincoln astronomy education group, Stellar Luminosity Calculator
- ↑ National Center for Atmospheric Research, The Effects of Solar Variability on Earth's Climate, 2012 Report
- ↑ Most of Earth's twins aren't identical, or even close !, by Ethan on June 5, 2013