BD-11 4672

BD-11 4672
Observation data; Epoch J2000.0 Equinox J2000.0 (ICRS)
Constellation	Scutum
Right ascension	18h 33m 28.8323s
Declination	−11° 38′ 09.7218″
Apparent magnitude (V)	9.99
Characteristics
Evolutionary stage	main sequence star
Spectral type	K7V
B−V color index	1.22
Astrometry
Radial velocity (Rv)	-87.5156±0.0011 km/s
Proper motion (μ)	RA: -288.590 mas/yr ; Dec.: -235.560 mas/yr
Parallax (π)	36.7812 ± 0.0466 mas
Distance	88.7 ± 0.1 ly ; (27.19 ± 0.03 pc)
Details
Mass	0.651+0.031; −0.029 M☉
Radius	0.639+0.020; −0.022 R☉
Luminosity (bolometric)	0.157+0.019; −0.017[citation needed] L☉
Surface gravity (log g)	4.642+0.027; −0.025[citation needed] cgs
Temperature	4550 ± 110[citation needed] K
Metallicity [Fe/H]	-0.48±0.07 dex
Rotation	25 d[citation needed]
Age	7.4+4.5; −4.9[citation needed] Gyr
Other designations
	BD-11 4672, GSC 05699-02129, HIP 90979, TYC 5262-825-1, 2MASS J18332885-1138097, TYC 5699-2129-1, Wolf 1462, GJ 717, Gaia DR2 4154598526336121600
Database references
SIMBAD	data

BD-11 4672 is a 9th magnitude orange dwarf star located 88.7 light-years away in the constellation of Scutum. This star was recognised as a high proper motion star by Max Wolf in 1924.^[4] It is a single star, and is the host to two known extrasolar planets.

Characteristics[]

BD-11 4672 is an K-type main sequence star. Its age is not well constrained, but is probably older than the Sun. Its metallicity is 35% that of the Sun.^[3] No significant flare activity was detected.^[5]

Planetary system[]

In 2010, a team of astronomers led by astronomer C. Moutou of the High Accuracy Radial Velocity Planet Searcher performed a radial-velocity analysis, which led to the suspicion of a gas giant planet in orbit around BD-11 4672.^[6] The planet existence was proven in 2014.^[7] In 2020, another gas giant planet was detected.^[2]

The BD-11 4672 planetary system^[8]^[2]
Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination	Radius
	>0.65±0.05 M_J	2.36±0.04	1634±14	0.05±0.05	—	—
	>0.04836^+0.009 _−0.0066 M_J	0.3±0.01	74.2±0.08	0.4±0.15	—	—

References[]

^ Jump up to: ^a ^b ^c ^d ^e ^f ^g BD-11 4672, entry, SIMBAD. Accessed online September 27, 2020.
^ Jump up to: ^a ^b ^c ^d Barbato, D.; Pinamonti, M.; Sozzetti, A.; Biazzo, K.; Benatti, S.; Damasso, M.; Desidera, S.; Lanza, A. F.; Maldonado, J.; Mancini, L.; Scandariato, G.; Affer, L.; Andreuzzi, G.; Bignamini, A.; Bonomo, A. S.; Borsa, F.; Carleo, I.; Claudi, R.; Cosentino, R.; Covino, E.; Fiorenzano, A. F. M.; Giacobbe, P.; Harutyunyan, A.; Knapic, C.; Leto, G.; Lorenzi, V.; Maggio, A.; Malavolta, L.; Micela, G.; et al. (2020), "The GAPS Programme at TNG XXIV. An eccentric Neptune-mass planet near the inner edge of the BD-11 4672 habitable zone", Astronomy & Astrophysics, A68: 641, arXiv:2006.14393, Bibcode:2020A&A...641A..68B, doi:10.1051/0004-6361/202037954, S2CID 220055727
^ Jump up to: ^a ^b Andreasen, D. T.; Sousa, S. G.; Tsantaki, M.; Teixeira, G. D. C.; Mortier, A.; Santos, N. C.; Suarez-Andres, L.; Delgado-Mena, E.; Ferreira, A. C. S. (2017), "SWEET-Cat update and FASMA A new minimization procedure for stellar parameters using high-quality spectra", Astronomy & Astrophysics, A69: 600, arXiv:1703.06671, Bibcode:2017A&A...600A..69A, doi:10.1051/0004-6361/201629967, S2CID 119534579
^ Wolf, M.; Reinmuth, K. (1925). "Einige bewegte Sterne in Scutum". Astronomische Nachrichten. 223 (14): 231. Bibcode:1925AN....223..231W. doi:10.1002/asna.19242231404.
^ Lammer, H.; Kővári, Zs; Hanslmeier, A.; Koller, F.; Korhonen, H.; Guenther, E. W.; Kriskovics, L.; Vida, K.; Greimel, R.; Odert, P.; Leitzinger, M. (2020), "A census of Coronal Mass Ejections on solar-like stars", Monthly Notices of the Royal Astronomical Society, 493 (3): 4570–4589, arXiv:2002.04430, Bibcode:2020MNRAS.493.4570L, doi:10.1093/mnras/staa504, S2CID 211076125
^ Moutou, C.; Mayor, M.; Lo Curto, G.; Ségransan, D.; Udry, S.; Bouchy, F.; Benz, W.; Lovis, C.; Naef, D.; Pepe, F.; Queloz, D.; Santos, N. C.; Sousa, S. G. (2011). "The HARPS search for southern extra-solar planets: XXVI: Seven new planetary systems". Astronomy and Astrophysics. 527 (A63): A63. arXiv:1012.3830. Bibcode:2011A&A...527A..63M. doi:10.1051/0004-6361/201015371. S2CID 118696125.
^ Moutou, C.; Lo Curto, G.; Mayor, M.; Bouchy, F.; Benz, W.; Lovis, C.; Naef, D.; Pepe, F.; Queloz, D.; Santos, N. C.; Ségransan, D.; Sousa, S. G.; Udry, S. (2014), "The HARPS search for southern extra-solar planets", Astronomy & Astrophysics, 576: A48, arXiv:1412.6591, doi:10.1051/0004-6361/201424965, S2CID 118512899
^ Planet BD-11 4672 b on exoplanet.eu

Coordinates: 18^h 33^m 28.8323^s, −11° 38′ 09.7218″

[sb-1] Jump up to: ^a ^b ^c ^d ^e ^f ^g BD-11 4672, entry, SIMBAD. Accessed online September 27, 2020.

[Barbato2020-2] Jump up to: ^a ^b ^c ^d Barbato, D.; Pinamonti, M.; Sozzetti, A.; Biazzo, K.; Benatti, S.; Damasso, M.; Desidera, S.; Lanza, A. F.; Maldonado, J.; Mancini, L.; Scandariato, G.; Affer, L.; Andreuzzi, G.; Bignamini, A.; Bonomo, A. S.; Borsa, F.; Carleo, I.; Claudi, R.; Cosentino, R.; Covino, E.; Fiorenzano, A. F. M.; Giacobbe, P.; Harutyunyan, A.; Knapic, C.; Leto, G.; Lorenzi, V.; Maggio, A.; Malavolta, L.; Micela, G.; et al. (2020), "The GAPS Programme at TNG XXIV. An eccentric Neptune-mass planet near the inner edge of the BD-11 4672 habitable zone", Astronomy & Astrophysics, A68: 641, arXiv:2006.14393, Bibcode:2020A&A...641A..68B, doi:10.1051/0004-6361/202037954, S2CID 220055727

[Andreasen2017-3] Jump up to: ^a ^b Andreasen, D. T.; Sousa, S. G.; Tsantaki, M.; Teixeira, G. D. C.; Mortier, A.; Santos, N. C.; Suarez-Andres, L.; Delgado-Mena, E.; Ferreira, A. C. S. (2017), "SWEET-Cat update and FASMA A new minimization procedure for stellar parameters using high-quality spectra", Astronomy & Astrophysics, A69: 600, arXiv:1703.06671, Bibcode:2017A&A...600A..69A, doi:10.1051/0004-6361/201629967, S2CID 119534579

[4] Wolf, M.; Reinmuth, K. (1925). "Einige bewegte Sterne in Scutum". Astronomische Nachrichten. 223 (14): 231. Bibcode:1925AN....223..231W. doi:10.1002/asna.19242231404.

[5] Lammer, H.; Kővári, Zs; Hanslmeier, A.; Koller, F.; Korhonen, H.; Guenther, E. W.; Kriskovics, L.; Vida, K.; Greimel, R.; Odert, P.; Leitzinger, M. (2020), "A census of Coronal Mass Ejections on solar-like stars", Monthly Notices of the Royal Astronomical Society, 493 (3): 4570–4589, arXiv:2002.04430, Bibcode:2020MNRAS.493.4570L, doi:10.1093/mnras/staa504, S2CID 211076125

[Moutou2010-6] Moutou, C.; Mayor, M.; Lo Curto, G.; Ségransan, D.; Udry, S.; Bouchy, F.; Benz, W.; Lovis, C.; Naef, D.; Pepe, F.; Queloz, D.; Santos, N. C.; Sousa, S. G. (2011). "The HARPS search for southern extra-solar planets: XXVI: Seven new planetary systems". Astronomy and Astrophysics. 527 (A63): A63. arXiv:1012.3830. Bibcode:2011A&A...527A..63M. doi:10.1051/0004-6361/201015371. S2CID 118696125.

[7] Moutou, C.; Lo Curto, G.; Mayor, M.; Bouchy, F.; Benz, W.; Lovis, C.; Naef, D.; Pepe, F.; Queloz, D.; Santos, N. C.; Ségransan, D.; Sousa, S. G.; Udry, S. (2014), "The HARPS search for southern extra-solar planets", Astronomy & Astrophysics, 576: A48, arXiv:1412.6591, doi:10.1051/0004-6361/201424965, S2CID 118512899

[8] Planet BD-11 4672 b on exoplanet.eu

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Observation data Epoch J2000.0 Equinox J2000.0 (ICRS)
Constellation	Scutum
Right ascension	18^h 33^m 28.8323^s^[1]
Declination	−11° 38′ 09.7218″^[1]
Apparent magnitude (V)	9.99^[1]
Characteristics
Evolutionary stage	main sequence star
Spectral type	K7V
B−V color index	1.22
Astrometry

Radial velocity (R_v)	-87.5156±0.0011^[1] km/s
Proper motion (μ)	RA: -288.590^[1] mas/yr Dec.: -235.560^[1] mas/yr
Parallax (π)	36.7812 ± 0.0466^[1] mas
Distance	88.7 ± 0.1 ly (27.19 ± 0.03 pc)

Details

Mass	0.651^+0.031 _−0.029^[2] `M`_☉
Radius	0.639^+0.020 _−0.022^[2] `R`_☉
Luminosity (bolometric)	0.157^+0.019 _−0.017^{[citation needed]} `L`_☉
Surface gravity (log g)	4.642^+0.027 _−0.025^{[citation needed]} cgs
Temperature	4550 ± 110^{[citation needed]} K
Metallicity [Fe/H]	-0.48±0.07^[3] dex
Rotation	25 d^{[citation needed]}
Age	7.4^+4.5 _−4.9^{[citation needed]} Gyr

Other designations
BD-11 4672, GSC 05699-02129, HIP 90979, TYC 5262-825-1, 2MASS J18332885-1138097, TYC 5699-2129-1, Wolf 1462, GJ 717, Gaia DR2 4154598526336121600
Database references
SIMBAD	data