XO-5 is a star located in the constellation Lynx at a distance of about 831 light years from us. At least one planet orbits a star.
| Xo-5 | |||
|---|---|---|---|
| Star | |||
| Observational data ( Age J2000.0 ) | |||
| Type of | Single star | ||
| Right ascension | |||
| Declination | |||
| Distance | 831 St. year (255 pc ) [1] | ||
| Visible magnitude ( V ) | 12.13 ± 0.03 [1] | ||
| Constellation | Lynx | ||
| Astrometry | |||
| Own movement (μ) | RA: -32.4 [3] Dec: -24.4 [3] | ||
| Parallax (π) | |||
| Specifications | |||
| Spectral class | G8V [3] | ||
| Color Index ( B - V ) | 0.84 ± 0.05 [1] | ||
| physical characteristics | |||
| Weight | 1.0 ± 0.03 [1] M ☉ | ||
| Radius | 1.11 ± 0.09 [1] R ☉ | ||
| Age | 8.5 ± 0.8 billion [1] years | ||
| Temperature | 5510 ± 44 [1] K | ||
| Metallicity | 0.25 ± 0.03 [1] | ||
| Rotation | 1.8 ± 0.5 km / s [1] | ||
| |||
| Database Information | |||
| SIMBAD | data | ||
| Sources: [3] | |||
Content
Features
In its characteristics, XO-5 resembles our Sun : it is the same yellow dwarf of the main sequence with almost the same mass and size. [1] The surface temperature of the star is slightly colder than our daylight - 5510 degrees Kelvin . The age of XO-5 is estimated at 8 and a half billion years.
When observing, XO-5 is randomly superimposed on a plume of atomic hydrogen emitted by galaxies NGC 2444 / NGC 2445 ( Arp 143 ) - objects farther away than the star under consideration.
Planet System
In 2008, a team of astronomers working with the XO telescope announced the discovery [1] of the planet XO-5 b in the system. This is a typical hot Jupiter circulating at a distance of only 0.04 a. e. from the parent star and making a complete revolution around it in 4 days. In terms of mass and size, the planet is practically no different from Jupiter . The discovery was made by the transit method .
| Planet | Weight ( M J ) | Radius ( R J ) | Circulation period ( days ) | Semimajor axis orbits ( a.u. ) | Eccentricity orbits |
|---|---|---|---|---|---|
| b | 1,077 ± 0,037 | 1.09 ± 0.06 | 4,1877539 | 0.0487 ± 0.0006 | 0 |
Notes
- ↑ 1 2 3 4 5 6 7 8 9 10 11 Christopher J. Burke, PR McCullough, Jeff A. Valenti, Doug Long, Christopher M. Johns-Krull, P. Machalek, Kenneth A. Janes, B. Taylor, Michael L Fleenor, Cindy N. Foote, Bruce L. Gary, Enrique Garcia-Melendo, J. Gregorio, T. Vanmunster. XO-5b: A Transiting Jupiter-sized Planet With A Four Day Day Period . Arxiv.org (May 15, 2008). Date of treatment September 22, 2010. Archived June 20, 2012.
- ↑ 1 2 3 4 5 Gaia Data Release 2 - 2018.
- ↑ 1 2 3 4 SIMBAD - XO-5 in the SIMBAD database . Date of treatment September 22, 2010.
See also
- Lynx constellation star list