Kepler-48

Kepler-48
Observation data; Epoch J2000 Equinox J2000
Constellation	Cygnus
Right ascension	19h 56m 33.416s
Declination	+40° 56′ 56.50″
Apparent magnitude (V)	13.174±0.103
Characteristics
Evolutionary stage	subgiant
Spectral type	K0V
Astrometry
Radial velocity (Rv)	−13.34±2.12 km/s
Proper motion (μ)	RA: 13.215(12) mas/yr ; Dec.: −20.410(15) mas/yr
Parallax (π)	3.2283±0.0116 mas
Distance	1,010 ± 4 ly ; (310 ± 1 pc)
Details
Mass	0.916 M☉
Radius	0.897 R☉
Luminosity	0.5137 L☉
Surface gravity (log g)	4.47363 cgs
Temperature	5,160 K
Metallicity [Fe/H]	0.2±0.1 dex
Rotational velocity (v sin i)	0.5 km/s
Age	3.14 Gyr
Other designations
	Kepler-48, KOI-148, KIC 5735762, 2MASS J19563341+4056564
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 system⁸
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 `M`_J	1.9	1001	0.003±0.028	—	—
f	0.93±0.29 `M`_J	5.7	5205	0.01±0.15	—	—

References

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.
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.
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.
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.
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.
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.
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.
"Kepler-48 Overview". NASA Exoplanet Archive.
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.
"Kepler-48". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 13 March 2025.

[constellation-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.

[GaiaDR3-2] 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.

[ucac4-3] 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.

[claudi2024-4] 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.

[rotfit-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.

[Kipla48-7] 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.

[archive-8] "Kepler-48 Overview". NASA Exoplanet Archive.

[MASSES,_RADII,_AND_ORBITS_OF_SMALL-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.

[SIMBAD-10] "Kepler-48". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 13 March 2025.

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Observation data Epoch J2000 Equinox J2000
Constellation	Cygnus¹
Right ascension	19^h 56^m 33.416^s²
Declination	+40° 56′ 56.50″²
Apparent magnitude (V)	13.174±0.103³
Characteristics
Evolutionary stage	subgiant²⁴
Spectral type	K0V⁵
Astrometry
Radial velocity (R_v)	−13.34±2.12² km/s
Proper motion (μ)	RA: 13.215(12) mas/yr² Dec.: −20.410(15) mas/yr²
Parallax (π)	3.2283±0.0116 mas²
Distance	1,010 ± 4 ly (310 ± 1 pc)
Details
Mass	0.916⁶ `M`_☉
Radius	0.897⁷ R_☉
Luminosity	0.5137⁸ `L`_☉
Surface gravity (log g)	4.47363⁷ cgs
Temperature	5,160⁷ K
Metallicity [Fe/H]	0.2±0.1⁸ dex
Rotational velocity (v sin i)	0.5⁹ km/s
Age	3.14⁹ Gyr
Other designations
Kepler-48, KOI-148, KIC 5735762, 2MASS J19563341+4056564¹⁰
Database references
SIMBAD	data
Exoplanet Archive	data
KIC	data