| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cygnus |
| Right ascension | 19h 47m 50.4746s[1] |
| Declination | +46° 02′ 03.500″[1] |
| Apparent magnitude (V) | 14.3[2] |
| Characteristics | |
| Spectral type | F7V[3] |
| Astrometry | |
| Proper motion (μ) | RA: 3.894(18) mas/yr[1] Dec.: −2.345(17) mas/yr[1] |
| Parallax (π) | 0.9316 ± 0.0139 mas[1] |
| Distance | 3,500 ± 50 ly (1,070 ± 20 pc) |
| Details[3] | |
| Mass | 1.29+0.06 −0.07 M☉ |
| Radius | 1.40±0.10 R☉ |
| Surface gravity (log g) | 4.25±0.06 cgs |
| Temperature | 6350±100 K |
| Metallicity [Fe/H] | 0.10±0.14 dex |
| Rotation | 4.464±0.013 days[4] |
| Rotational velocity (v sin i) | 16±2.5 km/s |
| Age | 2.1+0.8 −0.9 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
| KIC | data |
Kepler-39 (2MASS J19475046+4602034) is an F-type main sequence star located in the constellation Cygnus. It is located about 3,500 light-years (1,070 parsecs) away.[1] One known substellar companion orbits it, Kepler-39b.[5]
YouTube Encyclopedic
-
1/5Views:1 457 653622 62110 616 956457 447802 023
-
Dark Matter: Crash Course Astronomy #41
-
Planet Song/Planet 9 Song
-
The Last Star in the Universe – Red Dwarfs Explained
-
Kepler’s First Law of Motion - Elliptical Orbits (Astronomy)
-
Newtonian Gravity: Crash Course Physics #8
Transcription
Planetary system
Kepler-39b is generally considered a brown dwarf rather than a planet since it does not meet the standard definition of planet. Some authorities such as the Extrasolar Planets Encyclopaedia and the NASA Exoplanet Archive include it among their list of confirmed planets.[2][6]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 20.1+1.3 −1.2 MJ |
0.164±0.003 | 21.087210±0.000037 | 0.112±0.057 | 89.07±0.22° | 1.24+0.09 −0.10 RJ |
References
- ^ a b c d e Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ a b "Kepler-39 b". Extrasolar Planets Encyclopaedia. Retrieved 2018-06-09.
- ^ a b c Bonomo, A. S.; et al. (2015). "Improved parameters of seven Kepler giant companions characterized with SOPHIE and HARPS-N". Astronomy and Astrophysics. 575. A85. arXiv:1501.02653. Bibcode:2015A&A...575A..85B. doi:10.1051/0004-6361/201323042. S2CID 119230291.
- ^ McQuillan, A.; Mazeh, T.; Aigrain, S. (2013). "Stellar Rotation Periods of The Kepler objects of Interest: A Dearth of Close-In Planets Around Fast Rotators". The Astrophysical Journal Letters. 775 (1). L11. arXiv:1308.1845. Bibcode:2013ApJ...775L..11M. doi:10.1088/2041-8205/775/1/L11. S2CID 118557681.
- ^ Bouchy, F.; et al. (2011). "SOPHIE velocimetry of Kepler transit candidates. III. KOI-423b: an 18 MJup transiting companion around an F7IV star". Astronomy and Astrophysics. 533. A83. arXiv:1106.3225. Bibcode:2011A&A...533A..83B. doi:10.1051/0004-6361/201117095. S2CID 62836749.
- ^ "Kepler-39 b". NASA Exoplanet Archive. Retrieved 2018-06-09.
 | This extrasolar-planet-related article is a stub. You can help Wikipedia by expanding it. |
 | This subgiant-star-related article is a stub. You can help Wikipedia by expanding it. |
This page was last edited on 2 May 2024, at 20:48