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.

Kepler-1513
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]
Distance1,147 ± 5 ly
(352 ± 2 pc)
Details[6]
Mass0.943±0.037 M
Radius0.950+0.077
−0.055
 R
Luminosity (bolometric)0.743+0.148
−0.100
 L
Surface gravity (log g)4.46±0.10 cgs
Temperature5491±100 K
Metallicity0.17±0.06 [M/H]
Age7.0+4.0
−4.2
 Gyr
Other designations
Kepler-1513, KOI-3678, KIC 4150804, TIC 394177315, 2MASS J19190999+3917070[5]
Database references
SIMBADdata

Planetary system

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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]

The Kepler-1513 planetary system[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
1.7106[8] 841.4+8.1
−5.3
0.125+0.018
−0.019

See also

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References

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  1. ^ "Finding the constellation which contains given sky coordinates". djm.cc. 2 August 2008.
  2. ^ a b c d e f 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.
  3. ^ a b 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. S2CID 119283349.
  4. ^ a b c 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.
  5. ^ a b c d "Kepler-1513". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 8 October 2023.
  6. ^ a b c Yahalomi, Daniel A.; Kipping, David; et al. (2024). "Not So Fast Kepler-1513: A Perturbing Planetary Interloper in the Exomoon Corridor". Monthly Notices of the Royal Astronomical Society. 527: 620–639. arXiv:2310.03802. doi:10.1093/mnras/stad3070.
  7. ^ 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.
  8. ^ "Orbital Period Calculator | Binary System". www.omnicalculator.com. Retrieved 2023-10-31.