* sig Ori

Query : * sig 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
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sedIcon
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!). sed-help-icon

Hierarchy : number of linked objects
whatever the membership probability is (see description here ) :

: 1 : 825 Display criteria :

The link on the acronym of the identifiers give access to the information for this acronym in the dictionary of nomenclature.
Identifiers (64) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

* 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 (801 between 1850 and 2024) (Total 801)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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                Reference summaries :

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                 or select by : (not exhaustive, explanation here)

Collections of Measurements


velocities : 11    Fe_H : 2    PLX : 2    PM : 4    MK : 16   

   

Observing logs


IUE : 8   

   

External archives :

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

Data at NED - NASA/IPAC Extragalactic Database : * sig Ori

Link by name to the catalogue in VizieR :

ALS 8473 BD-02 1326 CCDM J05387-0236AB CEL 890 2E 1470
EUVE J0538-02.5 GSC 04771-01196 HD 37468 HIC 26549 HIP 26549
HR 1931 IRAS 0536-026P10 IRAS 05362-0237 LS VI -02 1 2MASS J05384476-0236001
NSV 16610 PLX 1293 PPM 188303 RAFGL 5159 SAO 132406
TYC 4771-1196-1 UCAC3 175-24559 UCAC4 437-010887 uvby98 100037468 ABV WDS J05387-0236AB
WISE J053844.88-023556.7 Gaia DR2 3216486439446556544 Gaia DR3 3216486443742786048

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Annotations :
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Please, have a look at Best practices. The list of all annotations to SIMBAD objects can be found here .

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