Kepler-445

Kepler-445
Observation data; Epoch J2000 Equinox ICRS
Constellation	Cygnus
Right ascension	19h 54m 56.65923s
Declination	+46° 29′ 54.7936″
Apparent magnitude (V)	18.19
Characteristics
Evolutionary stage	Main sequence
Spectral type	M4V
Apparent magnitude (G)	16.685±0.003
Apparent magnitude (J)	13.542±0.029
Apparent magnitude (H)	12.929±0.035
Apparent magnitude (K)	12.610±0.028
Astrometry
Proper motion (μ)	RA: 41.465 mas/yr ; Dec.: 132.351 mas/yr
Parallax (π)	8.1366±0.0457 mas
Distance	401 ± 2 ly ; (122.9 ± 0.7 pc)
Details
Mass	0.334+0.080; −0.059 M☉
Radius	0.347+0.068; −0.049 R☉
Luminosity (bolometric)	0.0115 L☉
Temperature	3219+89; −63 K
Metallicity [Fe/H]	+0.27 dex
Other designations
	Kepler-445, KOI-2704, KIC 9730163, TIC 268060194, 2MASS J19545665+4629548
Database references
SIMBAD	data
Exoplanet Archive	data

Kepler-445 is a red dwarf star located 401 light-years (123 parsecs) away in the constellation Cygnus. It hosts three known exoplanets, discovered by the transit method using data from the Kepler space telescope and confirmed in 2015.^[7] None of the planets orbit within the habitable zone.^[8]

Planetary system

Kepler-445b, c, and d orbit Kepler-445 every 3, 5, and 8 days,^[3] and have equilibrium temperatures of 401 K (128 °C; 262 °F), 341 K (68 °C; 154 °F), and 305 K (32 °C; 89 °F), respectively.^[9] With a radius of 2.72 times that of Earth, Kepler-445c is likely a mini-Neptune with a volatile-rich composition, and has been compared to GJ 1214 b.^[7] Kepler-445d is only slightly larger than the Earth, with a radius of 1.33 R_🜨.

The Kepler-445 planetary system^[4]
Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination (°)	Radius
b	—	0.023656	2.98416640+0.00000891 −0.00000936	0.02+0.16 −0.02	89.74+0.18 −0.28^[7]	1.74+0.29 −0.28 `R`_🜨
c	—	0.033427	4.87122714+0.00000636 −0.00000638	0.01+0.16 −0.01	89.91+0.07 −0.10^[7]	2.72+0.44 −0.43 `R`_🜨
d	—	0.047121	8.15272856+0.00006453 −0.00007041	0.01+0.16 −0.01	89.61+0.27 −0.25^[7]	1.33+0.25 −0.23 `R`_🜨

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.
1 2 3 4 5 6 7 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.
1 2 "Kepler-445". NASA Exoplanet Archive. Retrieved 24 May 2023.
1 2 3 Mann, Andrew W.; Dupuy, Trent; Muirhead, Philip S.; Johnson, Marshall C.; Liu, Michael C.; Ansdell, Megan; Dalba, Paul A.; Swift, Jonathan J.; Hadden, Sam (2017). "The Gold Standard: Accurate Stellar and Planetary Parameters for Eight Kepler M Dwarf Systems Enabled by Parallaxes". The Astronomical Journal. 153 (6): 267. arXiv:1705.01545. Bibcode:2017AJ....153..267M. doi:10.3847/1538-3881/aa7140. S2CID 119325474.
↑ Muirhead, Philip S.; Becker, Juliette; Feiden, Gregory A.; Rojas-Ayala, Bárbara; Vanderburg, Andrew; Price, Ellen M.; Thorp, Rachel; Law, Nicholas M.; Riddle, Reed; Baranec, Christoph; Hamren, Katherine; Schlawin, Everett; Covey, Kevin R.; Johnson, John Asher; Lloyd, James P. (2014). "Characterizing the Cool KOIs. VI. H- and K-band Spectra of Kepler M Dwarf Planet-candidate Hosts". The Astrophysical Journal Supplement Series. 213 (1): 5. arXiv:1406.2718. Bibcode:2014ApJS..213....5M. doi:10.1088/0067-0049/213/1/5.
1 2 3 4 "Kepler-445". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 24 May 2023.
1 2 3 4 5 6 Muirhead, Philip S.; Mann, Andrew W.; et al. (March 2015). "Kepler-445, Kepler-446 and the Occurrence of Compact Multiples Orbiting Mid-M Dwarf Stars". The Astrophysical Journal. 801 (1): 18. arXiv:1501.01305. Bibcode:2015ApJ...801...18M. doi:10.1088/0004-637X/801/1/18. S2CID 5541362.
↑ "[...] all of the planets are likely too hot to be located within their host stars’ habitable zones [...]"^[7]^: 8
↑ "Kepler Objects of Interest".

[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] 1 2 3 4 5 6 7 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.

[NASAExoplanetArchive-3] 1 2 "Kepler-445". NASA Exoplanet Archive. Retrieved 24 May 2023.

[Mann2017-4] 1 2 3 Mann, Andrew W.; Dupuy, Trent; Muirhead, Philip S.; Johnson, Marshall C.; Liu, Michael C.; Ansdell, Megan; Dalba, Paul A.; Swift, Jonathan J.; Hadden, Sam (2017). "The Gold Standard: Accurate Stellar and Planetary Parameters for Eight Kepler M Dwarf Systems Enabled by Parallaxes". The Astronomical Journal. 153 (6): 267. arXiv:1705.01545. Bibcode:2017AJ....153..267M. doi:10.3847/1538-3881/aa7140. S2CID 119325474.

[muirhead2014-5] Muirhead, Philip S.; Becker, Juliette; Feiden, Gregory A.; Rojas-Ayala, Bárbara; Vanderburg, Andrew; Price, Ellen M.; Thorp, Rachel; Law, Nicholas M.; Riddle, Reed; Baranec, Christoph; Hamren, Katherine; Schlawin, Everett; Covey, Kevin R.; Johnson, John Asher; Lloyd, James P. (2014). "Characterizing the Cool KOIs. VI. H- and K-band Spectra of Kepler M Dwarf Planet-candidate Hosts". The Astrophysical Journal Supplement Series. 213 (1): 5. arXiv:1406.2718. Bibcode:2014ApJS..213....5M. doi:10.1088/0067-0049/213/1/5.

[SIMBAD-6] 1 2 3 4 "Kepler-445". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 24 May 2023.

[Muirhead2015-7] 1 2 3 4 5 6 Muirhead, Philip S.; Mann, Andrew W.; et al. (March 2015). "Kepler-445, Kepler-446 and the Occurrence of Compact Multiples Orbiting Mid-M Dwarf Stars". The Astrophysical Journal. 801 (1): 18. arXiv:1501.01305. Bibcode:2015ApJ...801...18M. doi:10.1088/0004-637X/801/1/18. S2CID 5541362.

[8] "[...] all of the planets are likely too hot to be located within their host stars’ habitable zones [...]"^[7]^: 8

[KOI-9] "Kepler Objects of Interest".

[1]

[2]

[3]

[4]

[5]

[6]

[7]

[8]

[9]

Observation data Epoch J2000 Equinox ICRS
Constellation	Cygnus^[1]
Right ascension	19^h 54^m 56.65923^s^[2]
Declination	+46° 29′ 54.7936″^[2]
Apparent magnitude (V)	18.19^[3]
Characteristics
Evolutionary stage	Main sequence^[4]^[2]
Spectral type	M4V^[5]
Apparent magnitude (G)	16.685±0.003^[2]
Apparent magnitude (J)	13.542±0.029^[6]
Apparent magnitude (H)	12.929±0.035^[6]
Apparent magnitude (K)	12.610±0.028^[6]
Astrometry
Proper motion (μ)	RA: 41.465 mas/yr^[2] Dec.: 132.351 mas/yr^[2]
Parallax (π)	8.1366±0.0457 mas^[2]
Distance	401 ± 2 ly (122.9 ± 0.7 pc)
Details^[4]
Mass	0.334+0.080 −0.059 `M`_☉
Radius	0.347+0.068 −0.049 R_☉
Luminosity (bolometric)	0.0115 `L`_☉
Temperature	3219+89 −63 K
Metallicity [Fe/H]	+0.27 dex
Other designations
Kepler-445, KOI-2704, KIC 9730163, TIC 268060194, 2MASS J19545665+4629548^[6]
Database references
SIMBAD	data
Exoplanet Archive	data

v t e The Kepler-445 system
Stars	Kepler-445
Planets	Kepler-445b Kepler-445c Kepler-445d

This page was redesigned at the edge.

Planetary system

References