astro.wikisort.org - Planet
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]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Sculptor |
| Right ascension | 00h 20m 56.9940s[1] |
| Declination | −35° 59′ 53.747″[1] |
| Apparent magnitude (V) | 11.8 |
| Characteristics | |
| Spectral type | K2V[citation needed] |
| Astrometry | |
| Radial velocity (Rv) | 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 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 [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 | |
| Database references | |
| SIMBAD | data |
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]
| 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
- 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.
- 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
- 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
- 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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На других языках
- [en] WASP-45
[ru] WASP-45
WASP-45 — звезда в созвездии Скульптор на расстоянии приблизительно 652 световых лет от нас. Вокруг звезды обращается, как минимум, одна планета.Текст в блоке "Читать" взят с сайта "Википедия" и доступен по лицензии Creative Commons Attribution-ShareAlike; в отдельных случаях могут действовать дополнительные условия.
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