HD 211415 is a double star located in the constellation Crane at a distance of about 44 light years from us.
| HD 211415 | |||
|---|---|---|---|
| Star | |||
| Observational data ( Age J2000.0 ) | |||
| Right ascension | |||
| Declination | |||
| Distance | 44.4 ± 0.4 St. years old | ||
| Visible magnitude ( V ) | 5.33 | ||
| Constellation | Crane | ||
| Astrometry | |||
| Radial velocity ( R v ) | -13.9 km / s | ||
| Own movement (μ) | RA: 439.88 mas per year Dec: -632.60 mas per year | ||
| Parallax (π) | 73.47 mas | ||
| Absolute magnitude (V) | 4.66 | ||
| Specifications | |||
| Spectral class | G0 v | ||
| Color Index ( B - V ) | 0.59 | ||
| Color Index ( U - B ) | 0.06 | ||
| physical characteristics | |||
| Weight | 1,0 / 0,5 M ☉ | ||
| Radius | 0.96 / 0.56 R ☉ | ||
| Age | 3.3⋅10 9 years | ||
| Temperature | 5925 K | ||
| Metallicity | 49-54% (A) | ||
| |||
| Database Information | |||
| SIMBAD | |||
Content
Study History
The star is visible to the naked eye, so its discoverer is difficult to determine. The first references in astronomical literature about it appear in the Henry Draper catalog . Around 1900, the American astronomer Anthony Mauri , photographing the spectra of stars, cataloged this system, called HDO 298 AB , for the first time, thus determining its dual nature. In September 2003, the astrobiologist Margaret Turnbull identified this system as one of the most suitable candidates for maintaining favorable conditions for the emergence of life [2] . The selection criteria were determined by a list of various parameters, such as x-ray radiation , rotation, spectral class , etc.
Features
Both components of the system are dwarfs of the main sequence , in their characteristics close to our Sun. The distance between them increased from 31 a. e. in 1900 to 41 a. e. in 1980 . The average distance between the components is approximately 46 a. e. [3]
HD 211,415 A
The main component belongs to the class of yellow-orange dwarfs, its mass is approximately equal to the sun, and its diameter and luminosity are 0.86 and 1.09 solar, respectively [4] . The surface temperature of the star reaches 5925 degrees Kelvin. Her age is estimated at 3.3 billion years.
HD 211,415 V
This, more dull companion, belongs to the class of red dwarfs. Its mass is less than half the mass of the Sun, and its diameter and luminosity are 56% and 1.8%, respectively [4] .
Nearest star environment
The following star systems are within 20 light-years of HD 211415 :
| Star | Spectral class | Distance, st. years old |
| CD-55 9073 | K7-M0 V | 1,2 |
| CP-58 8327 | G4 v | 4,5 |
| CP-60 7821 | K0 v | 6.3 |
| CD-51 12998 | K2 V | 6.7 |
| LTT 9012 | M3.5 V | 7.0 |
| CP-60 7528 | M2 V | 7.5 |
| L 355-62 | M1-3 V | 7.9 |
| L 211-59 | M4 v | 9.0 |
| CD-51 13 128 A | M0 V | 9.2 |
| HR 8323 | G0-2 V | 9.3 |
| LHS 532 | M4 v | 9.9 |
| ν Indian | A3 V / F9-G0 V | 14 |
| γ peacock | F6-8 V | 17 |
| HR 209 | G1-5 IV | 20 |
Notes
- ↑ 1 2 3 4 Gaia Data Release 2 - 2018.
- ↑ Astronomer Announces Shortlist Of Stellar Candidates For Habitable Worlds , Science daily (March 23, 2009).
- ↑ Poveda, A .; Herrera, MA; Allen, C .; Cordero, G .; Lavalley, C. Statistical studies of visual double and multiple stars. II. A catalog of nearby wide binary and multiple systems. (eng.) . Rev. Mex. Astron. Astrofis., Vol. 28, No. 1, p. 43 - 89 (04/1994). Date of treatment March 23, 2009. Archived March 28, 2012.
- ↑ 1 2 Johnson, HM & Wright, CD Predicted infrared brightness of stars within 25 parsecs of the sun. (eng.) . Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 53, Nov. 1983, p. 643-711. (Nov. 1983). Date of treatment March 23, 2009. Archived February 16, 2012.
See also
- List of stars of the constellation Crane