HD 45364 is a star located in the constellation Canis Major at a distance of about 106 light years from us. At least two planets revolve around a star.
| HD 45364 | |||
|---|---|---|---|
| Star | |||
| Observational data ( Age J2000.0 ) | |||
| Type of | Single star | ||
| Right ascension | |||
| Declination | |||
| Distance | 106 ± 3 St. years (32.6 ± 0.9 pc ) | ||
| Visible magnitude ( V ) | 8.07 [1] | ||
| Constellation | Big dog | ||
| Astrometry | |||
| Radial velocity ( R v ) | 15.9 [2] km / s | ||
| Own movement (μ) | RA: 53.31 [2] Dec: -12.01 [2] | ||
| Parallax (π) | 30.69 ± 0.81 [2] mas | ||
| Absolute magnitude (V) | + 5.50 | ||
| Specifications | |||
| Spectral class | K0V [1] | ||
| Color Index ( B - V ) | 0.72 [1] | ||
| physical characteristics | |||
| Weight | 0.82 ± 0.05 [1] M ☉ | ||
| Temperature | 5434 ± 20 [1] K | ||
| Luminosity | 0.57 [1] L ☉ | ||
| Rotation | 1 km / s [1] | ||
| |||
| Database Information | |||
| SIMBAD | data | ||
| Sources: [2] | |||
Features
HD 45364 is an orange dwarf of the main sequence with a mass equal to 0.82 solar masses . The surface temperature of the star reaches approximately 5434 degrees Kelvin . [1] HD 45364 has a weak chromospheric activity, and it rotates quite slowly around its own axis - 1 km / s.
Planet System
In 2009, a group of astronomers announced the discovery [1] of two planets HD 45364 b and HD 45364 c in this system. They belong to the class of the so-called cool giants : their masses are 0.18 and 0.65 masses of Jupiter, respectively. Both of them circulate at a comfortable distance (that is, their companions may have liquid water) from the parent star: planet b - at a distance of 0.68 a. e. , making a complete revolution in 226 days , and planet c - at a distance of 0.89 a. e. with an orbital period of 342 days. The center of the habitable zone is located in the system at a distance of 0.75 AU
| Planet | Weight ( M J ) | Radius ( R J ) | Circulation period ( days ) | Semimajor axis orbits ( a.u. ) | Eccentricity orbits |
|---|---|---|---|---|---|
| b | ≥0.1872 | ? | 226.93 | 0.6813 | 0.1684 |
| c | ≥0.6579 | ? | 342.85 | 0.8972 | 0.0974 |
Notes
- ↑ 1 2 3 4 5 6 7 8 9 ACM Correia, S. Udry, M. Mayor, W. Benz, J.-L. Bertaux, F. Bouchy, J. Laskar, C. Lovis, C. Mordasini, F. Pepe, D. Queloz. HD45364, a pair of planets in a 3: 2 mean motion resonance Arxiv.org (Feb 3, 2009). Date of treatment December 12, 2009.
- ↑ 1 2 3 4 5 SIMBAD - HD 45364 in the SIMBAD database . Date of treatment December 11, 2009.
See also
- List of stars of the constellation Canis Major
- List of exoplanets discovered in 2009