Astronomy:W33A

Short description: Protostar in the constellation Sagittarius

W33A

Observation data Epoch J2000.0   Equinox (celestial coordinates)
Constellation	Sagittarius
Right ascension	18h 14m 39.5s
Declination	−17° 52′ 02.2″
Database references
SIMBAD	data

W33A is a protostar located approximately 12,000 light-years away from Earth, in the constellation Sagittarius. As a star in the early stages of formation, so has attracted the interest of astronomers, who observed that while the protostar is accumulating material from surrounding clouds of gas and dust, it is simultaneously ejecting fast moving jets of particles from its north and south poles.

External links

• An Inventory of Interstellar Ices toward the Embedded Protostar W33A, by Gibb, E. L.; Whittet, D. C. B.; Schutte, W. A.; Boogert, A. C. A.; Chiar, J. E.; Ehrenfreund, P.; Gerakines, P. A.; Keane, J. V.; Tielens, A. G. G. M.; van Dishoeck, E. F.; and Kerkhof, O., The Astrophysical Journal, Volume 536, Issue 1, pp. 347–356, DOI: 10.1086/308940, Harvard University
• VLTI/MIDI 10 μm Interferometry of the Forming Massive Star W33A, by W. J. de Wit1, M. G. Hoare1, R. D. Oudmaijer1 and J. C. Mottram1, 2007 ApJ 671 L169-L172, doi:10.1086/525253, School of Physics and Astronomy, University of Leeds, Leeds LS2 9JT, UK