{{Short description|Hot Jupiter}} {{Infobox planet | name = TrES-3b / Umbäässa | image = Exoplanet Comparison TrES-3 b.png | caption = Size comparison of TrES-3b with Jupiter. <!-- DISCOVERY -->| discoverer = O'Donovan et al. | discovery_site = United States | discovered = 2007 | discovery_method = Transit <!-- DESIGNATIONS --> <!-- ORBITAL -->| apsis = astron | semimajor = {{convert|0.0226|±|0.0013|AU|km|abbr=on}} | period = 1.30619 ± 0.00005 d | inclination = 82.15 | star = GSC 03089-00929 <!-- PHYS CHARS -->| mean_radius = 1.341 ± 0.081 {{Jupiter radius|link=y}} | mass = 1.92 ± 0.23 {{Jupiter mass|link=y}} | density = {{cvt|1172|kg/m3|g/cm3|lk=on|disp=out}} | surface_grav = 2.7 g | single_temperature = 1555 K<ref>{{citation|arxiv=2011.07169|title=Multi-color photometry and parameters estimation of Jupiter-sized exoplanets; TRES-3b, WASP-2b and HATP-30b|year=2020|last1=Saeed |first1=M. I. |last2=Goderya |first2=S. N. |last3=Chishtie |first3=F. A. }}</ref> <!-- ATMOSPHERE --> <!-- NOTES -->}} '''TrES-3b''' is an extrasolar planet orbiting the star GSC 03089-00929. It has an orbital period of just 31 hours and nearly twice the mass of Jupiter.
The planet TrES-3b is named '''Umbäässa'''. The name was selected in the NameExoWorlds campaign by Liechtenstein, during the 100th anniversary of the IAU. In the local dialect of southern Liechtenstein, Umbäässa is a small and barely visible ant.<ref>{{Cite web|url=http://www.nameexoworlds.iau.org/final-results|title=Approved names|website=NameExoworlds|language=en|access-date=2020-01-02}}</ref><ref>{{Cite web|url=https://www.iau.org/news/pressreleases/detail/iau1912/|title=International Astronomical Union {{!}} IAU|website=www.iau.org|access-date=2020-01-02}}</ref>
thumb|right|275px|The radial velocity trend of the star that hosts TrES-3.
==Discovery==
It is the third transiting planet found by the Trans-Atlantic Exoplanet Survey. It was discovered in the constellation Hercules about 10 degrees west of Vega, the brightest star in the summer skies.
Transits in front of the star GSC 03089-00929 were detected by two 10 cm telescopes operating out of Palomar and Lowell Observatories. Transits of TrES-3 were also independently observed by the Hungarian Automated Telescope Network. Seven high-precision radial velocity measurements were made using the HIRES spectrometer at W. M. Keck Observatory, which confirmed the presence of a planetary mass companion with a minimum mass twice that of the planet Jupiter.<ref name="O'Donovan2007"/>
==Characteristics== The planet's home star is slightly smaller and cooler than the Sun. The orbital period is less than one and a third days, one of the shortest known.<ref name="O'Donovan2007"/> Despite close proximity to the star, no evidence of tidal-driven orbital decay was present as in 2020, with best data fit indicating only an apsidal precession of planetary orbit.<ref>{{cite journal|arxiv=2006.00599|doi=10.3847/1538-3881/ab9818|title=Probing Transit Timing Variation and Its Possible Origin with 12 New Transits of TrES-3b|year=2020|last1=Mannaday|first1=Vineet Kumar|last2=Thakur|first2=Parijat|last3=Jiang|first3=Ing-Guey|last4=Sahu|first4=D. K.|last5=Joshi|first5=Y. C.|last6=Pandey|first6=A. K.|last7=Joshi|first7=Santosh|last8=Yadav|first8=Ram Kesh|last9=Su|first9=Li-Hsin|last10=Sariya|first10=Devesh P.|last11=Yeh|first11=Li-Chin|last12=Griv|first12=Evgeny|last13=Mkrtichian|first13=David|last14=Shlyapnikov|first14=Aleksey|last15=Moskvin|first15=Vasilii|last16=Ignatov|first16=Vladimir|last17=Vaňko|first17=M.|last18=Püsküllü|first18=Ç.|s2cid=219176648|journal=The Astronomical Journal|volume=160|issue=1|page=47|bibcode=2020AJ....160...47M |doi-access=free }}</ref>
==See also== * Trans-Atlantic Exoplanet Survey * Hot Jupiter
==References== {{Reflist|refs=
<ref name="O'Donovan2007">{{Cite journal | title=TrES-3: A Nearby, Massive, Transiting Hot Jupiter in a 31-Hour Orbit | last1=O'Donovan | first1=Francis T. | last2=Charbonneau | first2=David | last3=Bakos | first3=Gáspár Á. | last4=Mandushev | first4=Georgi | last5=Dunham | first5=Edward W. | last6=Brown | first6=Timothy M. | last7=Latham | first7=David W. | last8=Torres | first8=Guillermo | last9=Sozzetti | first9=Alessandro | last10=Kovács | first10=Géza | last11=Everett | first11=Mark E. | last12=Baliber | first12=Nairn | last13=Hidas | first13=Márton G. | last14=Esquerdo | first14=Gilbert A. | last15=Rabus | first15=Markus | last16=Deeg | first16=Hans J. | last17=Belmonte | first17=Juan A. | last18=Hillenbrand | first18=Lynne A. | last19=Stefanik | first19=Robert P. | s2cid=17637874 | display-authors=1 | journal=Astrophysical Journal Letters | volume=663 | issue=1 | pages=L37–L40 | year=2007 | arxiv=0705.2004 | bibcode=2007ApJ...663L..37O | doi=10.1086/519793 }}</ref>
}}
==External links== {{commonscat-inline|TrES-3 b|TrES-3}} * [https://www.sciencedaily.com/releases/2007/05/070531114321.htm Massive Transiting Planet With 31-hour Year Found Around Distant Star] * [https://web.archive.org/web/20070720200834/http://exoplanet.eu/planet.php?p1=TrES-3&p2= Notes for planet TrES-3] * [http://www.perseus.gr/Astro-Photometry-TrES-3-20110520.htm TrES-3 light curve using differential photometry]
{{Sky|17|52|07|+|37|32|46|1300}}
Category:Hercules (constellation) Category:Transiting exoplanets Category:Hot Jupiters Category:Exoplanets discovered in 2007 Category:Giant planets Category:Exoplanets with proper names {{Hercules (constellation)}}