WASP-12
| Observation data EpochJ2000.0EquinoxJ2000.0 | |
|---|---|
| Constellation | Auriga[1] |
| Right ascension | 06h30m32.7966s[2] |
| Declination | +29° 40′ 20.264″[2] |
| Apparent magnitude(V) | 11.560±0.068[3] |
| Characteristics | |
| Spectral type | G0V or F[citation needed] |
| Apparent magnitude(B) | 12.138±0.019[3] |
| Apparent magnitude(R) | ~11.6[4] |
| Apparent magnitude(J) | 10.477±0.021[5] |
| Apparent magnitude(H) | 10.228±0.022[5] |
| Apparent magnitude(K) | 10.188±0.020[5] |
| Astrometry | |
| Proper motion(μ) | RA:−1.519(19)mas/yr[2] Dec.:−6.761(15)mas/yr[2] |
| Parallax(π) | 2.4213 ± 0.0166mas[2] |
| Distance | 1,347 ± 9ly (413 ± 3pc) |
| Details | |
| Mass | 1.434+0.11 −0.09[6]M☉ |
| Radius | 1.657+0.046 −0.044[6]R☉ |
| Luminosity | 4.05+0.54 −0.53[6]L☉ |
| Temperature | 6360+130 −140[6]K |
| Metallicity | +0.33+0.14 −0.17[6] |
| Other designations | |
| Database references | |
| SIMBAD | data |
WASP-12is amagnitude11yellow dwarfstarlocated approximately 1347light-yearsaway[2]in theconstellationAuriga.[4]WASP-12 has amassandradiussimilar to theSunand is known for being orbited by a planet that is extremely hot and has aretrograde orbitaround WASP-12. WASP-12 forms a triple star system with twored dwarfcompanions. Both of them have spectral types of M3V and are only 38% and 37% as massive as the Sun, respectively.[7]
Planetary system
[edit]In 2008, theextrasolar planetWASP-12bwas discovered orbiting WASP-12 by thetransit method.[8]Its high carbon-to-oxygen ratio indicates that rocky planets might have formed in the star system, and it may be acarbon planet.[9]It is subject to intensive photo-evaporation, and may be completely destroyed within one billion years from now.[10]
In 2015, no indications of additional planets were found in the WASP-12 system except for WASP-12b.[6]
-
WASP-12b. -
WASP-12b. -
Artist's conception of WASP-12 &WASP-12b
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 1.41±0.1MJ | 0.0229±0.0008 | 1.091423±0.000003 | 0.049±0.015 | 86.0±3.0[11]° | 1.736±0.092[11]RJ |
See also
[edit]References
[edit]- ^Roman, Nancy G. (1987)."Identification of a Constellation From a Position".Publications of the Astronomical Society of the Pacific.99(617): 695–699.Bibcode:1987PASP...99..695R.doi:10.1086/132034.Vizier query form
- ^abcdeVallenari, A.; et al. (Gaia collaboration) (2023)."GaiaData 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.S2CID244398875. Gaia DR3 record for this sourceatVizieR.
- ^abHenden, A. A.; et al. (2016). "VizieR Online Data Catalog: AAVSO Photometric All Sky Survey (APASS) DR9 (Henden+, 2016)".VizieR On-line Data Catalog: II/336. Originally Published in: 2015AAS...22533616H.2336.Bibcode:2016yCat.2336....0H.Vizier catalog entry
- ^abc"SIMBAD query result: WASP-12 -- Star".Centre de Données astronomiques de Strasbourg.Retrieved2009-04-24.
- ^abcSkrutskie, Michael F.; Cutri, Roc M.; Stiening, Rae; Weinberg, Martin D.; Schneider, Stephen E.; Carpenter, John M.; Beichman, Charles A.; Capps, Richard W.; Chester, Thomas; Elias, Jonathan H.; Huchra, John P.; Liebert, James W.; Lonsdale, Carol J.; Monet, David G.; Price, Stephan; Seitzer, Patrick; Jarrett, Thomas H.; Kirkpatrick, J. Davy; Gizis, John E.; Howard, Elizabeth V.; Evans, Tracey E.; Fowler, John W.; Fullmer, Linda; Hurt, Robert L.; Light, Robert M.; Kopan, Eugene L.; Marsh, Kenneth A.; McCallon, Howard L.; Tam, Robert; Van Dyk, Schuyler D.; Wheelock, Sherry L. (1 February 2006)."The Two Micron All Sky Survey (2MASS)".The Astronomical Journal.131(2): 1163–1183.Bibcode:2006AJ....131.1163S.doi:10.1086/498708.ISSN0004-6256.S2CID18913331.Vizier catalog entry
- ^abcdefCollins, Karen A.; Kielkopf, John F.; Stassun, Keivan G. (2015)."TRANSIT TIMING VARIATION MEASUREMENTS OF WASP-12b AND QATAR-1b: NO EVIDENCE OF ADDITIONAL PLANETS".The Astronomical Journal.153(2): 78.arXiv:1512.00464.doi:10.3847/1538-3881/153/2/78.S2CID55191644.
- ^Bechter, Eric B.; Crepp, Justin R.; Ngo, Henry; Knutson, Heather A.; Batygin, Konstantin; Hinkley, Sasha; Muirhead, Philip S.; Johnson, John Asher; Howard, Andrew W.; Montet, Benjamin T.; Matthews, Christopher T.; Morton, Timothy D. (2014). "WASP-12b AND HAT-P-8b ARE MEMBERS OF TRIPLE STAR SYSTEMS".The Astrophysical Journal.788(1): 2.arXiv:1307.6857.Bibcode:2014ApJ...788....2B.doi:10.1088/0004-637X/788/1/2.S2CID36306243.
- ^Hebb, L.; et al. (2009-03-10)."WASP-12b: The Hottest Transiting Extrasolar Planet Yet Discovered".The Astrophysical Journal.693(2): 1920–1928.arXiv:0812.3240.Bibcode:2009ApJ...693.1920H.doi:10.1088/0004-637X/693/2/1920.
- ^Madhusudhan, Nikku; Harrington, Joseph; Stevenson, Kevin B.; Nymeyer, Sarah; Campo, Christopher J.; Wheatley, Peter J.; Deming, Drake; Blecic, Jasmina; et al. (December 8, 2010). "A high C/O ratio and weak thermal inversion in the atmosphere of exoplanet WASP-12b".Nature.469(7328): 64–7.arXiv:1012.1603.Bibcode:2011Natur.469...64M.doi:10.1038/nature09602.PMID21150901.S2CID4415171..
- ^D. Ehrenreich and J.-M. Désert, "Mass-loss rates for transiting exoplanets", 2011
- ^abStaff (2015)."Planet WASP-12 b".Extrasolar Planets Encyclopaedia.Retrieved4 August2017.
External links
[edit]- WASP-12b in transit (lightcurve)
- "WASP-12".Exoplanets.Archived fromthe originalon 2009-11-25.Retrieved2009-05-06.
