W33A

W33A

Observation data Epoch J2000.0      Equinox ICRS
Constellation	Sagittarius
Right ascension	18h 14m 39.5s
Declination	−17° 52′ 02″
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

• 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.; Kerkhof, O. (2000). "An Inventory of Interstellar ICES toward the Embedded Protostar W33A". The Astrophysical Journal. 536 (1): 347. Bibcode:2000ApJ...536..347G. doi:10.1086/308940.
• De Wit, W. J.; Hoare, M. G.; Oudmaijer, R. D.; Mottram, J. C. (2007). "VLTI/MIDI 10 μm Interferometry of the Forming Massive Star W33A". The Astrophysical Journal. 671 (2): L169–L172. arXiv:0711.0437. Bibcode:2007ApJ...671L.169D. doi:10.1086/525253.