Kepler-32 b (KOI KOI 952.01, KOI 952 b, KIC 9787239 b, 2MASS J19512217 + 4634273 b [2] ) is the first of two exoplanets in the star Kepler-32 in the constellation Cygnus. [1] [3]
| Kepler-32 b | |
|---|---|
| Exoplanet | |
| Parent star | |
| Star | Kepler-32 (KOI-952) |
| Constellation | Swan |
| Right ascension ( α ) | 19 h 51 m 22.177 s |
| Declination ( δ ) | + 46 ° 34 ′ 27.3 ″ |
| Visible magnitude ( m V ) | 15.913 |
| Distance | 988 ± 46 st. years old ( 303 ± 14 pc ) |
| Spectral class | M1 V |
| Mass ( m ) | 0.540 ± 0.02 M ☉ |
| Radius ( r ) | 0.530 ± 0.02 R ☉ |
| Temperature ( T ) | 3793 + 80 / - 74 K |
| Metallicity ([Fe / H]) | - 0.010 ± 0.09 |
| Age | 2 billion years |
| Observed location regarding the star | |
| Projection distance ( d ) on the picture plane | 0.05204 ± 0.00087 a. e. |
| Orbit elements | |
| Semi-axis ( a ) | 0.05204 ± 0.00087 a. e. |
| Eccentricity ( e ) | 0 |
| Orbital period ( P ) | 5.90124 ± 0.0001 d. |
| Pericenter Argument ( ω ) | 90 ° |
| Pericenter Time ( T 0 ) | 2454974.9020 ± 0.008 JD |
| physical characteristics | |
| Mass ( m ) | <4.1 M J (<1303.0 M ⊕ ) |
| Radius ( r ) | 0.196 ± 0.0178 R J ( 2.2 ± 0.2 R ⊕ ) |
| Density ( ρ ) | 3.1 g / cm 3 |
| Temperature ( T ) | 559.9 K |
| Opening Information | |
| opening date | 2012 |
| Detection method | Transit |
| Place of discovery | telescope "Kepler" |
| Discovery status | Posted [1] |
| Other designations | |
| KOI KOI 952.01, KOI 952 b, KIC 9787239 b, 2MASS J19512217 + 4634273 b [2] | |
The planet Kepler-32 b is smaller than Jupiter and Neptune , its radius is 2.2 Earth, its mass is roughly estimated at 6 Earth, which leads to an average density of 3.1 grams per cubic centimeter. This is more than that of mini-neptunes, but less than that of real rocky planets. Close proximity to the star means the possible evaporation of the atmosphere into open space.
Kepler-32 b orbits in a circular orbit at a distance of 0.05 AU. from the parent star. It makes a full turn in more than six days.
In 2012, a group of astronomers working with data from the Kepler orbiting telescope announced the discovery of two planets and three candidates for a planet in the system. Later, their size was overvalued. The true masses of the planets (roughly estimated by the transit time) are much smaller than their upper limits, determined by the criteria of dynamic stability of the system.
Content
Native Star
Kepler-32 is a star located in the constellation Cygnus about 988 light-years from us. At least two planets and three more candidates for planets are turning around the star. [1] [3]
Kepler-32 is a star of almost 16 apparent magnitude, almost twice the size of our Sun in size and mass. The mass of the star is 0.58 solar, and the radius is 0.53. [1] [3]
See also
- Kepler-32
- List of exoplanets discovered in 2012
- List of exoplanets discovered by the Kepler telescope
- Kepler (telescope)
Notes
- ↑ 1 2 3 4 1207.5804v1, 2012 .
- ↑ 1 2 NASA Exoplanet Archive .
- ↑ 1 2 3 1102.0541v2, 2011 .
Literature
- Michael Perryman. Part 6. Transits // The Exoplanet Handbook . - Cambridge University Press , 2011. - p. 103-114. - 424 s. - ISBN 9780521765596 . Archive dated July 21, 2013 on Wayback Machine
Articles
- Roberto Sanchis-Ojeda et all. Alignment of the stellar spin with the orbits of a three-planet system (Eng.) . - 2012. - arXiv : 1207.5804v1 .
- William D. Cochran et all. System Of Three Planets Confirmed by Transit Timing Variations, Lightcurve Validation, Spitzer Photometry and Radial Velocity Measurements (Eng.) . - 2011. - arXiv : 1110.0820v1 .
- William J. Borucki. Kepler, II: Analysis of the first four months of data . - 2011. - arXiv : 1102.0541v2 .
- Stephen R. Kane, Dawn M. Gelino. Decoupling Phase Variations in Multi-Planet Systems (Eng.) // The Astrophysical Journal . - 2012. - arXiv : 1211.6747v1 .
- Montet B., Johnson J. DModel-Independent Stellar and Planetary Masses from Multi-Transiting Exoplanetary Systems (Eng.) . - 2012. - arXiv : 1211.4028v1 . (inaccessible link)
Links
- NASA's Kepler announces 11 planetary systems hosting 26 planets (eng.) . Ames Research Center. Archived July 10, 2013.
Catalogs
- Kepler-32 b (eng.) . exoplanets.org. Archived July 12, 2013.
- Kepler-32 b (English) (inaccessible link) . Open Exoplanet Catalog. Archived July 12, 2013.
- Kepler-32 b (eng.) . Ames Research Center. Archived July 12, 2013.
- Kepler-32 b (eng.) . NASA Exoplanet Archive. Archived July 12, 2013.
- Kepler-32 b (eng.) . SIMBAD. Archived July 12, 2013.