W33A

Basic data :
W 33a -- Young Stellar Object Origin of the objects types : (Ref) Object type as listed in the reference "Ref" (acronym) Object type linked to the acronym according to the original reference () Anterior to 2007, before we can link the objet type to a reference, or given by the CDS team in some particular cases Other object types: Mas (2010MNRAS,Caswell,...), smm (AGAL,JCMTLSP,...), HII (1996A&AS,[BNM96],...), MIR (AKARI,MSX5C,...), Rad (GRS,Kes,...), Y*O (2015MNRAS), IR (IRAS,RAFGL), out (2015MNRAS), cor (2016ApJ), G (2MASX), mm ([VVE2000]) Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" : ra dec : right ascension and declination (unit and frame defined according to your Output Options) Grey values are increasing the original precision due to the computation of frame transformations (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam) [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue), position angle (in degrees North celestial pole to East) quality : flag of quality E ≥ 10" D : 1-10" (and some old data) C : 0.1-1" B : 0.01-0.1" + 2MASS, Tyc A : VLBI, Hipparcos bibcode : bibcode of the coordinates reference ICRS coord. (ep=J2000) : 18 14 39.56547 -17 52 02.2260 (Near-IR) [ ] C 2006AJ....131.1163S Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" : ra dec : right ascension and declination (unit and frame defined according to your Output Options) Grey values are increasing the original precision due to the computation of frame transformations (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam) [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue), position angle (in degrees North celestial pole to East) quality : flag of quality E ≥ 10" D : 1-10" (and some old data) C : 0.1-1" B : 0.01-0.1" + 2MASS, Tyc A : VLBI, Hipparcos bibcode : bibcode of the coordinates reference FK4 coord. (ep=B1950 eq=1950) : 18 11 44.27029 -17 52 59.7969 [ ] Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" : ra dec : right ascension and declination (unit and frame defined according to your Output Options) Grey values are increasing the original precision due to the computation of frame transformations (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam) [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue), position angle (in degrees North celestial pole to East) quality : flag of quality E ≥ 10" D : 1-10" (and some old data) C : 0.1-1" B : 0.01-0.1" + 2MASS, Tyc A : VLBI, Hipparcos bibcode : bibcode of the coordinates reference Gal coord. (ep=J2000) : 012.90812042 -00.26074253 [ ] Syntax of proper motions is : "pm-ra pm-dec [error ellipse] quality bibcode" pm-ra : mu-ra*cos(dec) (expressed in the ICRS system in mas/yr) pm-dec : mu-dec (expressed in the ICRS system in mas/yr) [error ellipse] : error major axis and minor axis (in mas), orientation angle (in deg) quality : flag of quality (A=best quality -> E=worst quality, {� } =unknown quality) bibcode : bibcode of the proper motion reference Proper motions mas/yr : -0.36 -2.22 [0.40 0.40 90] C 2019ApJ...885..131R Velocity of Local System : VSLR Vmin Vmax [error] (wavelength) bibcode VLSR : 36.6 32.3 40.9 [0.13] (Rad) 1996A&AS..115...81B Syntax of parallax is : 'value quality [error] bibcode' value : parallax value quality : flag of quality (A=best quality -> E=worst quality, {� } =unknown quality) [error] : mean error bibcode : bibcode of the parallax reference Parallaxes (mas): 0.396 [0.032] C 2019ApJ...885..131R Syntax of angular size is : "maj-axis min-axis angle (wtype) quality bibcode" maj-axis : major axis size (arc minutes) min-axis : minor axis size (arc minutes) angle : orientation angle (in degrees) (wtype) : wavelength class for the origin of the angular size (Rad, mm, IR, Opt, UV, Xray, Gam) quality : flag of quality of the angular size values ( A=best quality -> E=worst quality, {� } =unknown quality) bibcode : bibcode of the angular size reference Angular size (arcmin): 0.897 0.305 220 (NIR) C 2006AJ....131.1163S Syntax of fluxes (or magnitudes) is : "filter-name (System) flux-value [error] quality MultVarFlags bibcode" filter-name : U, B, V, R, I, G, J, H, K, u, g, r, i, z (System) : may be AB (default is Vega) flux-value : value of flux or magnitude [error] : error value quality : flag of quality of the flux value ( A=best quality -> E=worst quality, {� } =unknown quality) MultVarFlags : Mult is zero or one char (J) for joined photometry ; Var can be zero or two chars (V[0-4]) bibcode : bibcode of the flux reference Fluxes (3) : J 13.055 [0.047] C 2006AJ....131.1163S H 10.212 [0.135] C 2006AJ....131.1163S K 7.967 [0.051] C 2006AJ....131.1163S	SIMBAD within arcmin ', {sourceSize:12, color:'#30a090'})); aladin.on('objectClicked', function(object) { var objName=object.data.MAIN_ID; aladin.showPopup(object.ra,object.dec,'',''+ objName+''); });" title="Show Simbad objects"> Overlay points in this preview 2MASS DSS SDSSXMMIRACIRISGALEX All (CDSPortal) Send to within arcsec The VizieR photometry tool allows for easy visualization of photometry points extracted around the Simbad position from photometry-enabled catalogues in VizieR. The search radius has to be specified by the user. It is currently limited to a maximum of 30 arcsec. It depends mostly on the precision or quality of the coordinates (SIMBAD and VizieR catalogs), the resolution of the images from which the sources were extracted, source extent, and source crowding. Suggestions are: crowded field: 0.5 to 1.5 arcsec, 3 arcsec otherwise; uncertain coordinates (SIMBAD quality E or coordinates without reference): 5 to 30 arsec (risky!).

AGAL G012.908-00.259	JPS G012.908-00.261	SCOPE G012.91-00.26	[RMB2014] G012.90-00.26
AKARI-IRC-V1 J1814396-175156	Kes 64	WISEA J181439.52-175200.5	[SHK2000] 18117-1753
Caswell CH3OH 012.909-00.260	2MASX J18143956-1752022	WISE J181439.58-175158.3	[THW2006] G012.908-00.261SMM
Caswell CH3OH 012.91-00.26	MMB G012.909-00.260	W 33a	[THW2006] G012.90-00.25 a
Caswell H2O 012.91-00.26	MSH 18-1-04	[ARM2000] G012.908-00.259	[VVE2000] W33A MM 2
GAL 012.9-00.3	MSX5C G012.9079-00.2606	[BNM96] 012.907-0.259	[WBH98] 18117-1753
GRS G012.90 -00.30	MSX6C G012.9090-00.2607	[CUS2014] G012.9071-0.2595	[WHR97] 18117-1753
IRAS 18117-1753	OH 012.91-00.26	[ERG2015] 2777	[WWW74] G012.9-0.3
JCMTLSP J181439.4-175203	OH 012.908-00.260	[JGD81] H2O 012.91-0.26
JCMTSE J181439.2-175202	OH 012.9-00.3	[PCC93] 236
JCMTSF J181439.2-175202	RAFGL 2090	[PMB2005] CH3OH 012.90-00.26

References (680 between 1850 and 2023) (Total 680) Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system). Follow new references on this object

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Data at NED - NASA/IPAC Extragalactic Database : W33A

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