TW Hydrae association

TW Hydrae association

The TW Hydrae association is a group of approximately twenty very young stars located 50 parsecs [cite journal | url=http://adsabs.harvard.edu/abs/2005ApJ...634.1385M | author=Mamajek| title= A Moving Cluster Distance to the Exoplanet 2M1207b in the TW Hydrae Association | journal= The Astrophysical Journal| volume=634 | year=2005 | pages=1385–1394| doi= 10.1086/468181 ] from Earth that share a common motion and appear to all be roughly the same age, 5-10 million years old. The best studied members of this stellar associationare TW Hydrae (nearest known accreting T Tauri star to the Earth), HR 4796 (an A-type star with resolved dusty debris disk; the most massive known group member), HD 98800 (a quadruple star system with debris disk), and 2M1207 (accreting brown dwarf with remarkable planetary-mass companion 2M1207b).

References


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  • TW Hydrae — Starbox short name = TW Hydrae epoch = J2000.0 constell = Hydra ra = RA|11|01|52 dec = DEC| 34|42|17 appmag v = 11.1 absmag v = dist ly = 176.245 dist pc = 54 ± 5 spectral = K8V names = GSC 07208 00347, HIP 53911 Simbad = TW+HyaTW Hydrae is an… …   Wikipedia

  • Asociación estelar de TW Hydrae — Saltar a navegación, búsqueda La Asociación estelar TW Hydrae es un grupo de estrellas muy jóvenes situadas a unos 50 pársecs de la Tierra[1] que presentan un movimiento común a través del espacio. Con una edad estimada entre 5 y 10 millones de… …   Wikipedia Español

  • 2M1207 — Starbox begin name = 2M1207Starbox image caption = European Southern Observatory infrared image of 2M1207 (bluish) and companion planet 2M1207b (reddish), taken in 2004.Starbox observe epoch = J2000.0 (ICRS) constell = Centaurus ra =… …   Wikipedia

  • 2M1207b — Planetbox begin name=2M1207bPlanetbox image caption = Infrared image of 2M1207 (blueish) and 2M1207b (reddish). The two objects are separated by less than one arc second in Earth s sky. Image taken using the ESO s 8.2m Yepun VLT.Planetbox star… …   Wikipedia

  • HD 98800 — Starbox begin name = HD 98800Starbox observe epoch = J2000.0 constell = Crater ra = RA|11|22|05.2898 dec = DEC| 24|46|39.760 appmag v = 9.11Starbox character class = K5Ve r i = v r = b v = u b = variable = T TauriStarbox astrometry radial v =… …   Wikipedia

  • 2M1207b — Экзопланета Списки экзопланет Сравнеительные размеры 2M1207b и Юпитера. Родительская звезда Звезда 2M1207 …   Википедия

  • 2M1207 b — 2M1207 b Экзопланета Списки экзопланет …   Википедия

  • Stellar kinematics — is the study of the movement of stars without needing to understand how they acquired their motion. This differs from stellar dynamics, which takes into account gravitational effects. The motion of a star relative to the Sun can provide useful… …   Wikipedia

  • List of astronomy acronyms — This is a compilation of acronyms commonly used in astronomy. Most of the acronyms are drawn from professional astronomy and are used quite frequently in scientific publications. However, a few of these acronyms are frequently used by the general …   Wikipedia

  • HR 4796 — A Constelación Centaurus Ascensión recta α 12h 36min 01,03s Declinación δ 39º 52’ 10,2’’ Distancia …   Wikipedia Español

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