Theta1 Orionis A

Basic data :
* tet01 Ori A -- Herbig Ae/Be Star 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: * (HD,*,...), X (COUP,CXOONC,...), ** (**,ADS,...), Rad (2017ApJ,GBS,...), IR (MAX,MLLA,...), Y*O (ISOY,[RRS2008]), SB* (2004A&A,SBC9), NIR (2MASS,VISION), Ae* (1999AJ), V* (V*) 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 35 15.8254015008 -05 23 14.334699480 (Optical) [ 0.0432 0.0352 90 ] A 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 32 48.3627554133 -05 25 07.712210829 [ 0.0432 0.0352 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) : 209.0072238201465 -19.3853398586314 [ 0.0432 0.0352 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 : 1.355 0.250 [0.058 0.048 90] A 2020yCat.1350....0G 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) 28.30 [1] / z(~) 0.000094 [0.000003] / cz 28.30 [1.00]    B 2004A&A...424..727P 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): 2.6427 [0.0718] A 2020yCat.1350....0G 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: B0V C 1977ApJS...34..115W 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 5.87 [~] C 2002yCat.2237....0D B 6.75 [~] C 2002yCat.2237....0D V 6.73 [~] C 2002yCat.2237....0D R 6.42 [~] C 2002yCat.2237....0D G 6.627540 [0.002802] C 2020yCat.1350....0G I 6.21 [~] C 2002yCat.2237....0D J 6.09 [~] D 2002ApJ...573..366M H 5.802 [0.024] C 2003yCat.2246....0C K 5.668 [0.021] 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!).
Some important notes on this object about identifications and objects associations. notes: Spatially resolved into NAME tet01 Ori A1+NAME tet01 Ori A2; A1 is the actual SB*, sometimes described as A1+A3 in the litterature (e.g.2003ApJ...599..537C). Component A3 is not in Simbad (not spatially resolved).

HD 37020	HGAM 436	TIC 427394748	[HAB84] 73
* tet01 Ori A	HIC 26220	TYC 4774-953-1	[HC2000] 336
* 41 Ori A	HIP 26220	UBV 5511	[LKP2003] 10
** STF 748A	HR 1893	UBV M 51674	[LML2004] 230
** PTR 1A	ISOY J053515.80-052315.2	UCAC4 424-010226	[LRY2000] 121
ADS 4186 A	JP11 5669	USNO-B1.0 0846-00061568	[OW94] 158-314
ALS 14651	JP11 5668	uvby98 900010587	[OW94] 158-314S
BD-05 1315A	2MASS J05351582-0523143	V* V1016 Ori	[RRS2008] 158-314
Brun 587	MAX 85	VISION J05351582-0523143	[S58] 93
CCDM J05353-0524BH	MLLA 440	WDS J05353-0523A	[S78b] 75A
COUP 745	Parenago 1865	WDS J05353-0523Aa,Ab	[SCB99] 94
COUP J053515.8-052314	PLX 1276	WEB 5123	[SCH2001] 1
CSI-05 1315 8	PMSC 05304-0527Aab	WH 279	[SEM2016] 418
CXOONC J053515.8-052314	PMSC 05304-0527A	[FBG2002] 498	[ZRK2004] 41
GBS-VLA J053515.83-052314.1	ROT 875	[FDM2003] X 326	[ZRK2004] 158-314
GCRV 3410	SBC9 340	[FDM2003] Opt 347	Gaia DR3 3017364132050194688
GEN# +9.00010587	SBC9 341	[FRM2016] 254	Gaia DR2 3017364132050194688
GEN# +2.19760587	SKY# 9019	[GCS95] 177
GMR 12	TCC 45	[H97b] 1865

References (479 between 1850 and 2023) (Total 479) 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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External archives :

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

Data at NED - NASA/IPAC Extragalactic Database : Theta1 Orionis A

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