Kepler-48

Kepler-48

Observation data Epoch J2000       Equinox J2000
Constellation	Cygnus [1]
Right ascension	19h 56m 33.416s [2]
Declination	+40° 56′ 56.50″ [2]
Apparent magnitude  (V)	13.174±0.103 [3]
Characteristics
Evolutionary stage	subgiant [2] [4]
Spectral type	K0V [5]
Astrometry
Radial velocity (Rv)	−13.34±2.12 [2] km/s
Proper motion (μ)	RA: 13.215(12) mas/yr [2] Dec.: −20.410(15) mas/yr [2]
Parallax (π)	3.2283±0.0116  mas [2]
Distance	1,010 ± 4  ly (310 ± 1  pc)
Details
Mass	0.916 [6]   M☉
Radius	0.897 [7]   R☉
Luminosity	0.5137 [8]   L☉
Surface gravity (log g)	4.47363 [7]   cgs
Temperature	5,160 [7]   K
Metallicity [Fe/H]	0.2±0.1 [8]   dex
Rotational velocity (v sin i)	0.5 [9]  km/s
Age	3.14 [9]   Gyr
Other designations
Kepler-48, KOI-148, KIC 5735762, 2MASS J19563341+4056564 [10]
Database references
SIMBAD	data
Exoplanet Archive	data
KIC	data

Kepler-48, previously designated KOI-148, is a subgiant star in the constellation of Cygnus, about 1,000 light years away.

Planetary System

Kepler-48 has five confirmed exoplanets.

The Kepler-48 planetary system ^[8]

Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination	Radius
b	6.8±2.9  M🜨	0.054	4.78	—	—	1.85±0.09  R🜨
c	11.1±3.2  M🜨	0.086	9.67	—	—	2.56±0.07  R🜨
d	9±6  M🜨	0.23	42.9	—	—	1.98±0.07  R🜨
e	2.16±0.07  MJ	1.9	1001	0.003±0.028	—	—
f	0.93±0.29  MJ	5.7	5205	0.01±0.15	—	—

References

1. Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific . 99 (617): 695. Bibcode:1987PASP...99..695R. doi: 10.1086/132034 . Constellation record for this object at VizieR.
2. 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. Zacharias, N.; Finch, C. T.; Girard, T. M.; Henden, A.; Bartlett, J. L.; Monet, D. G.; Zacharias, M. I. (2012). "VizieR Online Data Catalog: UCAC4 Catalogue (Zacharias+, 2012)". Vizier Online Data Catalog. Bibcode:2012yCat.1322....0Z.
4. Claudi, R.; et al. (2024). "The GAPS Programme at TNG. LI. Investigating the correlations between transiting system parameters and host chromospheric activity". Astronomy and Astrophysics. 682. Bibcode:2024A&A...682A.136C. doi:10.1051/0004-6361/202347079. hdl: 10261/359655 .
5. Frasca, A.; Molenda-Żakowicz, J.; De Cat, P.; Catanzaro, G.; Fu, J. N.; Ren, A. B.; Luo, A. L.; Shi, J. R.; Wu, Y.; Zhang, H. T. (2016). "Activity indicators and stellar parameters of the Kepler targets. An application of the ROTFIT pipeline to LAMOST-Kepler stellar spectra". Astronomy and Astrophysics. 594. arXiv: 1606.09149 . Bibcode:2016A&A...594A..39F. doi:10.1051/0004-6361/201628337.
6. Weiss, Lauren M.; Isaacson, Howard; Howard, Andrew W.; Fulton, Benjamin J.; Petigura, Erik A.; Fabrycky, Daniel; Jontof-Hutter, Daniel; Steffen, Jason H.; Schlichting, Hilke E.; Wright, Jason T.; Beard, Corey; Brinkman, Casey L.; Chontos, Ashley; Giacalone, Steven; Hill, Michelle L.; Kosiarek, Molly R.; MacDougall, Mason G.; Močnik, Teo; Polanski, Alex S.; Turtelboom, Emma V.; Tyler, Dakotah; Van Zandt, Judah (1 January 2024). "The Kepler Giant Planet Search. I. A Decade of Kepler Planet-host Radial Velocities from W. M. Keck Observatory". The Astrophysical Journal Supplement Series. 270 (1): 8. arXiv: 2304.00071 . Bibcode:2024ApJS..270....8W. doi: 10.3847/1538-4365/ad0cab . ISSN   0067-0049.
7. Stassun, Keivan G.; Oelkers, Ryan J.; Paegert, Martin; Torres, Guillermo; Pepper, Joshua; Lee, Nathan De; Collins, Kevin; Latham, David W.; Muirhead, Philip S.; Chittidi, Jay; Rojas-Ayala, Bárbara; Fleming, Scott W.; Rose, Mark E.; Tenenbaum, Peter; Ting, Eric B.; Kane, Stephen R.; Barclay, Thomas; Bean, Jacob L.; Brassuer, C. E.; Charbonneau, David; Ge, Jian; Lissauer, Jack J.; Mann, Andrew W.; McLean, Brian; Mullally, Susan; Narita, Norio; Plavchan, Peter; Ricker, George R.; Sasselov, Dimitar; Seager, S.; Sharma, Sanjib; Shiao, Bernie; Sozzetti, Alessandro; Stello, Dennis; Vanderspek, Roland; Wallace, Geoff; Winn, Joshua N. (1 October 2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158 (4): 138. arXiv: 1905.10694 . Bibcode:2019AJ....158..138S. doi: 10.3847/1538-3881/ab3467 .
8. "Kepler-48 Overview". NASA Exoplanet Archive.
9. Marcy, Geoffrey W.; et al. (13 January 2014). "Masses, Radii, and Orbits of Small Kepler Planets: The Transition from Gaseous to Rocky Planets". The Astrophysical Journal Supplement Series. 210 (2): 20. arXiv: 1401.4195 . Bibcode:2014ApJS..210...20M. doi:10.1088/0067-0049/210/2/20.
10. "Kepler-48". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 13 March 2025.