HR 753 ( HD 16160 , Gliese 105 , Lat. Gliese 105 ) is a triple star in the constellation Kit . It is located at a distance of about 24 St. years from the sun .
| HR 753 ABC | |||
|---|---|---|---|
| Star | |||
 | |||
| Observational data ( The Age of J2000) | |||
| Right ascension | A: 02h 36m 4.9 s B: 02 h 36 m 15.0 s C: 02h 35m 58.8 s | ||
| Declination | A: + 06 ° 53 ′ 12.7 ″ B: + 06 ° 52 ′ 18 ″ C: + 06 ° 52 ′ 00 ″ | ||
| Distance | 23.8 ± 0.2 | ||
| Visible magnitude ( V ) | 5.82 / 11.66 / 16.9 | ||
| Constellation | Whale | ||
| Astrometry | |||
| Radial velocity ( R v ) | 25.7 km / s | ||
| Proper motion (μ) | RA: 1806.18 mas per year Dec: 1442.40 mas per year | ||
| Parallax (π) | 136.98 mas | ||
| Absolute magnitude (V) | 6.49 / 12.34 / 17.58 | ||
| Specifications | |||
| Spectral class | K3 V / M3.5 Vn / M7 V | ||
| Color Indicator ( B - V ) | 0.97 / 1.60 | ||
| Color Index ( U - B ) | 0.81 / 1.12 | ||
| Variability | Missing / BY Dra | ||
| physical characteristics | |||
| Weight | 0.81 / 0.21 / 0.08 M ☉ | ||
| Radius | 0.79 / 0.28 R ☉ | ||
| Age | 4.8-6.6 billion years | ||
| Temperature | 4400 K | ||
| |||
Characteristics
HR 753 consists of three stars, respectively: HR 753 A , HR 753 B and HR 753 C. Star A is visible to the naked eye, component B was discovered in the twentieth century by the Dutch astronomer Adrian van Maanen , and the third component C - only in 1994 .
HR 753 A
The star is an orange-red dwarf of the main sequence , belonging to the spectral class K3 V. It has 81% of the solar mass, 85% of its diameter, and only 21% of its luminosity.
HR 753 B
HR 753 V is a red dwarf of the spectral class M3,5 Vn, also has another name - BX Kit . The star has one thousandth luminosity of the Sun, 21% of its mass and 28% of its diameter. Researchers note that HR 753 B has abnormally low chromospheric and coronal activity [1] .
HR 753 C
Extremely dim and cold red dwarf HR 753 C of the spectral class M7 V has a mass equal to 8.2% of the solar [2] . In addition, the star is not much larger than the size of Jupiter . The habitable zone in this system is extremely small, and therefore HR 753 C is not of interest for the search for extraterrestrial life.
Star's Neighborhood
The following star systems are within 10 light years from HR 753 :
| Star | Spectral class | Distance, sv. years old |
| LP 469-206 | MV | 5.6 |
| LP 469-67 | MV | 7.1 |
| 107 Pisces | K1 V | 7,8 |
| AC + 25 7918 | M3 V | 7.9 |
| Kappa 1 Whale | G5 Ve | 8.2 |
| L 1159-16 | M4,5 Ve | 9.6 |
| Luyten 730-18 AB | M3 V / M3 V-VI | 9.8 |
Notes
See also
- List of stars in China constellation
Links
- Astronomical database SIMBAD (eng.)
- Solstation (eng.)