WASP-45

WASP-45
Observation data; Epoch J2000 Equinox J2000
Constellation	Sculptor
Right ascension	00h 20m 56.9940s
Declination	−35° 59′ 53.747″
Apparent magnitude (V)	11.8
Characteristics
Spectral type	K2V[citation needed]
Astrometry
Radial velocity (Rv)	4.95 km/s
Proper motion (μ)	RA: 52.895 mas/yr ; Dec.: −46.877 mas/yr
Parallax (π)	4.7064 ± 0.039 mas
Distance	693 ± 6 ly ; (212 ± 2 pc)
Details
Mass	0.932+0.045; −0.046 M☉
Radius	0.891±0.013 R☉
Luminosity	0.510±0.013 L☉
Surface gravity (log g)	4.508+0.023; −0.025 cgs
Temperature	5140±200 K
Metallicity [Fe/H]	0.388+0.09; −0.10 dex
Rotational velocity (v sin i)	2.3±0.7 km/s
Age	5.4+4.7; −3.5 Gyr
Other designations
	Gaia DR2 2308834780352875904, TYC 6996-583-1, GSC 06996-00583, 2MASS J00205699-3559537
Database references
SIMBAD	data

WASP-45 is a K-type main-sequence star about 690 light-years away. The star age cannot be well constrained, but it is probably older than Sun. Yet, WASP-45 is enriched in heavy elements compared to Sun, having 240% of solar abundance.^[2]

The star has low ultraviolet emission, therefore suspected to have a low starspot activity,^[4] although chromospheric activity was reported elsewhere.^[5]

Planetary system[]

In 2011 a transiting hot Jupiter planet b was detected.^[5] The planet equilibrium temperature is 1170±24 K. No Rayleigh scattering was detected in planetary atmosphere, implying existence of hazes or high cloud deck.^[6]

The WASP-45 planetary system^[6]^[2]
Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination	Radius
b	1.018^+0.046 _−0.045 M_J	0.0405±0.0001	3.126090^+0.000037 _−0.000036	0.048^+0.034 _−0.029	84.686±0.098°	0.978^+0.026 _−0.024 R_J

References[]

^ Jump up to: ^a ^b ^c ^d ^e ^f Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
^ Jump up to: ^a ^b ^c Addison, Brett; Wright, Duncan J.; Wittenmyer, Robert A.; Horner, Jonathan; Mengel, Matthew W.; Johns, Daniel; Marti, Connor; Nicholson, Belinda; Okumura, Jack; Bowler, Brendan; Crossfield, Ian; Kane, Stephen R.; Kielkopf, John; Plavchan, Peter; Tinney, C. G.; Zhang, Hui; Clark, Jake T.; Clerte, Mathieu; Eastman, Jason D.; Swift, Jon; Bottom, Michael; Muirhead, Philip; McCrady, Nate; Herzig, Erich; Hogstrom, Kristina; Wilson, Maurice; Sliski, David; Johnson, Samson A.; Wright, Jason T.; et al. (2019), "MINERVA-Australis I: Design, Commissioning, & First Photometric Results", Publications of the Astronomical Society of the Pacific, 131 (1005): 115003, arXiv:1901.11231, Bibcode:2019PASP..131k5003A, doi:10.1088/1538-3873/ab03aa, S2CID 119370785
^ WASP-45 -- High proper-motion Star
^ Shkolnik, Evgenya L. (2013), "An Ultraviolet Investigation of Activity on Exoplanet Host Stars", The Astrophysical Journal, 766 (1): 9, arXiv:1301.6192, Bibcode:2013ApJ...766....9S, doi:10.1088/0004-637X/766/1/9, S2CID 118415788
^ Jump up to: ^a ^b Anderson, D. R.; Collier Cameron, A.; Gillon, M.; Hellier, C.; Jehin, E.; Lendl, M.; Maxted, P. F. L.; Queloz, D.; Smalley, B.; Smith, A. M. S.; Triaud, A. H. M. J.; West, R. G.; Pepe, F.; Pollacco, D.; Ségransan, D.; Todd, I.; Udry, S. (2012), "WASP-44b, WASP-45b and WASP-46b: three short-period, transiting extrasolar planets", Monthly Notices of the Royal Astronomical Society, 422 (3): 1988–1998, arXiv:1105.3179, Bibcode:2012MNRAS.422.1988A, doi:10.1111/j.1365-2966.2012.20635.x, S2CID 34406657
^ Jump up to: ^a ^b Ciceri, S.; Mancini, L.; Southworth, J.; Lendl, M.; Tregloan-Reed, J.; Brahm, R.; Chen, G.; d'Ago, G.; Dominik, M.; Figuera Jaimes, R.; Galianni, P.; Harpsøe, K.; Hinse, T. C.; Jørgensen, U. G.; Juncher, D.; Korhonen, H.; Liebig, C.; Rabus, M.; Bonomo, A. S.; Bott, K.; Henning, Th.; Jordán, A.; Sozzetti, A.; Alsubai, K. A.; Andersen, J. M.; Bajek, D.; Bozza, V.; Bramich, D. M.; Browne, P.; et al. (2016), "Physical properties of the planetary systems WASP-45 and WASP-46 from simultaneous multi-band photometry", Monthly Notices of the Royal Astronomical Society, 456 (1): 990–1002, arXiv:1511.05171, Bibcode:2016MNRAS.456..990C, doi:10.1093/mnras/stv2698, S2CID 14670311

Coordinates: 00^h 20^m 56.9940^s, −35° 59′ 53.7474″

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[dr2-1] Jump up to: ^a ^b ^c ^d ^e ^f Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.

[Addison2019-2] Jump up to: ^a ^b ^c Addison, Brett; Wright, Duncan J.; Wittenmyer, Robert A.; Horner, Jonathan; Mengel, Matthew W.; Johns, Daniel; Marti, Connor; Nicholson, Belinda; Okumura, Jack; Bowler, Brendan; Crossfield, Ian; Kane, Stephen R.; Kielkopf, John; Plavchan, Peter; Tinney, C. G.; Zhang, Hui; Clark, Jake T.; Clerte, Mathieu; Eastman, Jason D.; Swift, Jon; Bottom, Michael; Muirhead, Philip; McCrady, Nate; Herzig, Erich; Hogstrom, Kristina; Wilson, Maurice; Sliski, David; Johnson, Samson A.; Wright, Jason T.; et al. (2019), "MINERVA-Australis I: Design, Commissioning, & First Photometric Results", Publications of the Astronomical Society of the Pacific, 131 (1005): 115003, arXiv:1901.11231, Bibcode:2019PASP..131k5003A, doi:10.1088/1538-3873/ab03aa, S2CID 119370785

[simbad-3] WASP-45 -- High proper-motion Star

[4] Shkolnik, Evgenya L. (2013), "An Ultraviolet Investigation of Activity on Exoplanet Host Stars", The Astrophysical Journal, 766 (1): 9, arXiv:1301.6192, Bibcode:2013ApJ...766....9S, doi:10.1088/0004-637X/766/1/9, S2CID 118415788

[Anderson2011-5] Jump up to: ^a ^b Anderson, D. R.; Collier Cameron, A.; Gillon, M.; Hellier, C.; Jehin, E.; Lendl, M.; Maxted, P. F. L.; Queloz, D.; Smalley, B.; Smith, A. M. S.; Triaud, A. H. M. J.; West, R. G.; Pepe, F.; Pollacco, D.; Ségransan, D.; Todd, I.; Udry, S. (2012), "WASP-44b, WASP-45b and WASP-46b: three short-period, transiting extrasolar planets", Monthly Notices of the Royal Astronomical Society, 422 (3): 1988–1998, arXiv:1105.3179, Bibcode:2012MNRAS.422.1988A, doi:10.1111/j.1365-2966.2012.20635.x, S2CID 34406657

[Ciceri2015-6] Jump up to: ^a ^b Ciceri, S.; Mancini, L.; Southworth, J.; Lendl, M.; Tregloan-Reed, J.; Brahm, R.; Chen, G.; d'Ago, G.; Dominik, M.; Figuera Jaimes, R.; Galianni, P.; Harpsøe, K.; Hinse, T. C.; Jørgensen, U. G.; Juncher, D.; Korhonen, H.; Liebig, C.; Rabus, M.; Bonomo, A. S.; Bott, K.; Henning, Th.; Jordán, A.; Sozzetti, A.; Alsubai, K. A.; Andersen, J. M.; Bajek, D.; Bozza, V.; Bramich, D. M.; Browne, P.; et al. (2016), "Physical properties of the planetary systems WASP-45 and WASP-46 from simultaneous multi-band photometry", Monthly Notices of the Royal Astronomical Society, 456 (1): 990–1002, arXiv:1511.05171, Bibcode:2016MNRAS.456..990C, doi:10.1093/mnras/stv2698, S2CID 14670311

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Observation data Epoch J2000 Equinox J2000
Constellation	Sculptor
Right ascension	00^h 20^m 56.9940^s^[1]
Declination	−35° 59′ 53.747″^[1]
Apparent magnitude (V)	11.8
Characteristics
Spectral type	K2V^{[citation needed]}
Astrometry

Radial velocity (R_v)	4.95^[1] km/s
Proper motion (μ)	RA: 52.895^[1] mas/yr Dec.: −46.877^[1] mas/yr
Parallax (π)	4.7064 ± 0.039^[1] mas
Distance	693 ± 6 ly (212 ± 2 pc)

Details^[2]

Mass	0.932+0.045 −0.046 `M`_☉
Radius	0.891±0.013 `R`_☉
Luminosity	0.510±0.013 `L`_☉
Surface gravity (log g)	4.508+0.023 −0.025 cgs
Temperature	5140±200 K
Metallicity [Fe/H]	0.388+0.09 −0.10 dex
Rotational velocity (v sin i)	2.3±0.7 km/s
Age	5.4+4.7 −3.5 Gyr

Other designations
Gaia DR2 2308834780352875904, TYC 6996-583-1, GSC 06996-00583, 2MASS J00205699-3559537^[3]
Database references
SIMBAD	data