Kepler-1513
Kepler-1513 is a main-sequence star about 1,150 light-years (350 parsecs) away in the constellation Lyra. It has a late-G[4] or early-K[3] spectral type, and it hosts at least one, and likely two, exoplanets.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Lyra[1] |
| Right ascension | 19h 19m 09.99418s[2] |
| Declination | +39° 17′ 06.9287″[2] |
| Apparent magnitude (V) | 12.888±0.100 (Kepler band) |
| Characteristics | |
| Evolutionary stage | Main sequence |
| Spectral type | K0V[3] or late G[4] |
| Apparent magnitude (G) | 12.946±0.003[2] |
| Apparent magnitude (J) | 11.758±0.027[5] |
| Apparent magnitude (H) | 11.397±0.030[5] |
| Apparent magnitude (K) | 11.309±0.020[5] |
| Astrometry | |
| Radial velocity (Rv) | −0.42±1.41[2] km/s |
| Proper motion (μ) | RA: 20.439 mas/yr[2] Dec.: 1.745 mas/yr[2] |
| Parallax (π) | 2.8446 ± 0.0134 mas[2] |
| Distance | 1,147 ± 5 ly (352 ± 2 pc) |
| Details[6] | |
| Mass | 0.943±0.037 M☉ |
| Radius | 0.950+0.077 −0.055 R☉ |
| Luminosity (bolometric) | 0.743+0.148 −0.100 L☉ |
| Surface gravity (log g) | 4.46±0.10 cgs |
| Temperature | 5491±100 K |
| Metallicity | 0.17±0.06 [M/H] |
| Age | 7.0+4.0 −4.2 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Planetary system
Kepler-1513b (KOI-3678.01) was confirmed in 2016 as part of a study statistically validating hundreds of Kepler planets.[7] In November 2022, an exomoon candidate was reported around Kepler-1513b based on transit-timing variations (TTVs). Unlike previous giant exomoon candidates in the Kepler-1625 and Kepler-1708 systems, this exomoon would have been terrestrial-mass, ranging from 0.76 Lunar masses to 0.34 Earth masses depending on the planet's mass and the moon's orbital period.[4]
In October 2023, a follow-up study by the same team of astronomers using additional observations found that the observed TTVs cannot be explained by an exomoon, but can be explained by a second, outer planet, Kepler-1513c, with a mass comparable to Saturn.[6]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 0.152+0.104 −0.061 MJ |
0.53+0.04 −0.03 |
160.8842+0.0011 −0.0028 |
0.306+0.093 −0.097 |
— | 8.05+0.58 −0.40 R🜨 |
| c | 0.266+0.098 −0.063 MJ |
— | 841.4+8.1 −5.3 |
0.125+0.018 −0.019 |
— | — |
See also
References
- "Finding the constellation which contains given sky coordinates". djm.cc. 2 August 2008.
- 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.
- Frasca, A.; Molenda-Żakowicz, J.; et al. (October 2016). "Activity indicators and stellar parameters of the Kepler targets. An application of the ROTFIT pipeline to LAMOST-Kepler stellar spectra". Astronomy & Astrophysics. 594: A39. arXiv:1606.09149. Bibcode:2016A&A...594A..39F. doi:10.1051/0004-6361/201628337.
- Kipping, David; Yahalomi, Daniel A. (January 2023). "A search for transit timing variations within the exomoon corridor using Kepler data". Monthly Notices of the Royal Astronomical Society. 518 (3): 3482–3493. arXiv:2211.06210. Bibcode:2023MNRAS.518.3482K. doi:10.1093/mnras/stac3360.
- "Kepler-1513". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 8 October 2023.
- Yahalomi, Daniel A.; Kipping, David; et al. (October 2023). "Not So Fast Kepler-1513: A Perturbing Planetary Interloper in the Exomoon Corridor". Monthly Notices of the Royal Astronomical Society. arXiv:2310.03802.
- Morton, Timothy D.; Bryson, Stephen T.; et al. (May 2016). "False Positive Probabilities for all Kepler Objects of Interest: 1284 Newly Validated Planets and 428 Likely False Positives". The Astrophysical Journal. 822 (2): 86. arXiv:1605.02825. Bibcode:2016ApJ...822...86M. doi:10.3847/0004-637X/822/2/86.
