V* HL Tau

Basic data :
V* HL Tau -- Orion Variable 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: * (GSC,EPIC,...), X (XEST,2XMM,...), Y*O (2010ApJS,[GMM2009]), MIR (AKARI,WISEA,...), TT* (1999AJ), Or* (2012ApJ), ** (**,WDS), Em* (2020A&A,HBC), V* (V*,AAVSO), smm (JCMTSE,JCMTSF), Opt (LAMOST,SDSS), HH (HH), Rad (GBS), NIR (2MASS), IR (SSV) 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) : 04 31 38.5107609312 +18 13 57.859747968 (Optical) [ 11.4782 7.7331 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) : 04 28 44.4781293853 +18 07 35.866251135 [ 11.4782 7.7331 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) : 178.8591136056473 -19.9721550788992 [ 11.4782 7.7331 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 : 4.2 -15.3 [3.2 6.9 90] C 2012yCat.1322....0Z 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: K5 D 2004ApJ...616..998W 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 (12) : B 15.89 [0.11] D 2012yCat.1322....0Z V 14.49 [0.06] D 2012yCat.1322....0Z R 14.39 [0.18] E 2012yCat.1322....0Z G 17.638250 [0.037221] C 2020yCat.1350....0G J 10.624 [0.042] C 2003yCat.2246....0C H 9.171 [0.046] C 2003yCat.2246....0C K 7.410 [0.017] C 2003yCat.2246....0C u (AB) 16.887 [0.009] C 2009ApJS..182..543A g 15.20 [0.06] D 2012yCat.1322....0Z r 13.80 [0.07] D 2012yCat.1322....0Z i 13.01 [0.08] D 2012yCat.1322....0Z z (AB) 12.296 [0.002] C 2009ApJS..182..543A	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!).

GSC 01269-01065	JCMTSE J043138.3+181356	UCAC2 38202581	[BFR2003] 35
** HER 10B	JCMTSF J043138.3+181356	UCAC4 542-009387	[FGM2003] 29
AKARI-IRC-V1 J0431384+181357	JP11 5275	V* HL Tau	[FGM2003] S19
EPIC 210690913	LAMOST J043138.47+181357.9	WDS J04317+1814B	[FK83] LDN 1551 11
GBS-VLA J043138.42+181357.3	2MASS J04313843+1813576	WISEA J043138.48+181357.6	[GBA2007] 1319
Haro 6-14	SDSS J043138.46+181357.8	WISE J043138.43+181357.5	[GMM2009] Tau L1551 2
HBC 49	SSV LDN 1551 1	XEST 22-043	AAVSO 0425+18B
HH 150	TIC 353752575	2XMM J043138.4+181357	Gaia DR3 3314312226646863488

References (1423 between 1850 and 2024) (Total 1423) 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 : V* HL Tau

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