sigma Ori

Basic data :
* sig Ori -- 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: * (*,ALS,...), ** (2001AJ,**,...), SB* (1950ApJ), X (2E,[FPS2006],...), UV (CEL,EUVE,...), IR (IRAS,RAFGL,...), Y*O (2014ApJ), AB? (1991A&AS), V* (NSV), NIR (2MASS), MIR (WISE) 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) : 05 38 44.7653828520 -02 36 00.283179888 (Optical) [ 1.8914 1.6851 90 ] C 2020yCat.1350....0G 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) : 05 36 14.0482955624 -02 37 38.597753095 [ 1.8914 1.6851 90 ] 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) : 206.8163419778146 -17.3360114093526 [ 1.8914 1.6851 90 ] 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 : 4.6 -0.4 [1.0 1.0 90] C 2012yCat.1322....0Z Syntax of radial velocity (or/and redshift) is : "value [error] (wavelength) quality bibcode" value : radial velocity or/and redshift (Heliocentric frame) according to your Output Options (redshift may be not displayed if the data value is <0 and the database inside value is a radial velocity) [error] : error of the corresponding value displayed before (wavelength) : wavelength range of the measurement : Rad, mm, IR, Opt, UV, Xray, Gam or  '∼'(unknown) quality : flag of quality ( A=best quality -> E=worst quality, {� } =unknown quality) bibcode : bibcode of the value's origin Radial velocity / Redshift / cz : V(km/s) 29.90 [1.6] / z(~) 0.000100 [0.000005] / cz 29.90 [1.60]    B 2007AN....328..889K 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): 3.04 [8.92] A 2007A&A...474..653V Spectral type is made of 3 parts: %coding is composed of 4 parts : the spectral type, which is made of a temperature class, eventually a luminosity class (roman number) and/or spectral peculiarities; a quality letter: A=best quality→E=worst quality, {� } =unknown quality % a quality letter: A=best quality -> E=worst quality, {� } =unknown quality bibcode : bibcode of the spectral type reference Spectral type: O9.5V+B0.2V(n) C 2021A&A...646A..11M 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): 0.0050 0.0 77 (Opt) D 2001AJ....122.3466M 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 (9) : U 2.54 [~] C 2002yCat.2237....0D B 3.58 [0.01] B 2014ApJ...794...36H V 3.79 [0.01] B 2014ApJ...794...36H R 3.87 [~] C 2002yCat.2237....0D G 3.790166 [0.012771] C 2020yCat.1350....0G I 4.11 [~] C 2002yCat.2237....0D J 4.75 [0.26] D 2003yCat.2246....0C H 4.64 [0.25] D 2003yCat.2246....0C K 4.490 [0.016] C 2003yCat.2246....0C	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!).

* sig Ori	2E 1470	LS VI -02 1	UBV 5698
* 48 Ori	2E 0536.2-0237	2MASS J05384476-0236001	UCAC3 175-24559
* sig Ori B	EUVE J0538-02.5	Mayrit AB	UCAC4 437-010887
* sig Ori A	GC 7031	MCW 345	uvby98 100037468 ABV
** BU 1032	GCRV 3488	N30 1211	WDS J05387-0236AB
** STF 762AB	GEN# +1.00037468	NSV 16610	WEB 5232
ADS 4241 AB	GOS G206.82-17.34 01	PLX 1293	WH 415
ALS 8473	GSC 04771-01196	PPM 188303	WISE J053844.88-023556.7
BD-02 1326	HD 37468	RAFGL 5159	YPAC 389
CCDM J05387-0236AB	HGAM 463	ROT 896	[FPS2006] NX 80
CEL 890	HIC 26549	SAO 132406	[KSP2003] J053844.77-023559.1
CGO 101	HIP 26549	SKY# 9178	[SC93b] 356
CSI-02 1326 1	HR 1931	TIC 11286198	[SSC2008] 19
CSI-02 1326 6	IRAS 0536-026P10	TYC 4771-1196-1	[W96] rJ053845-0236
CSI-02 1326 5	IRAS 05362-0237	UBV M 11305	Gaia DR2 3216486439446556544
CSI-02 1326 4	JP11 1205	UBV 5696	Gaia DR3 3216486443742786048

References (785 between 1850 and 2023) (Total 785) 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

Collections of Measurements

External archives :

Archive data at HEASARC - High-Energy Astrophysics Science Archive Research Center

Data at NED - NASA/IPAC Extragalactic Database : sigma Ori

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