WASP-45
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Sculptor |
| Right ascension | 00h 20m 56.9940s[1] |
| Declination | −35° 59′ 53.7474″[1] |
| Apparent magnitude (V) | 11.8 |
| Characteristics | |
| Spectral type | K2V |
| 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[1] |
| 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 | 0.388+0.09 −0.10 |
| Rotational velocity (v sin i) | 2.3±0.7 km/s |
| Age | 5.4+4.7 −3.5 Gyr |
| Other designations | |
| 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,[3], although chromospheric activity was reported elsewhere.[4]
Planetary system
In 2011 a transiting hot Jupiter planet b was detected.[4] The planet equilibrium temperature is 1170±24 K.[5]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 1.018+0.046 −0.045 MJ |
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 RJ |
References
- ^ a b c d WASP-45 -- High proper-motion Star
- ^ a b c MINERVA-Australis I: Design, Commissioning, & First Photometric Results, 2019, arXiv:1901.11231
- ^ 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
- ^ 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
- ^ 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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