t tauri

Basic data :
V* T Tau -- T Tauri 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,AG,...), X (2015A&A,1E,...), smm (JCMTSE,JCMTSF,...), IR (IRAS,PSCz,...), TT* (1999AJ), Or* (2012ApJ), Y*O (2010ApJS), ** (**,WDS), V* (V*,AAVSO), Rad (GBS,[SSZ84]), MIR (AKARI,WISE), HH (HH), Em* (HBC), UV (XEST), NIR (2MASS) 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 21 59.4319873992 +19 32 06.432393336 (Optical) [ 0.0349 0.0207 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) : 04 19 04.2116269422 +19 25 05.702841471 [ 0.0349 0.0207 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) : 176.2297068572864 -20.8868259090075 [ 0.0349 0.0207 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 : 11.682 -14.341 [0.052 0.038 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) 23.90 [1.5] / z(~) 0.000080 [0.000005] / cz 23.90 [1.50]    B 2006AstL...32..759G 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): 6.8901 [0.0377] 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: K0IV/Ve C 1977ApJ...214..747H 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): 0.80 0.57 154 (smm) C 2019MNRAS.485.2895E 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 (10) : B 11.22 [0.07] D 2012yCat.1322....0Z V 10.12 [0.02] D 2012yCat.1322....0Z R 9.80 [0.08] E 2012yCat.1322....0Z G 9.668167 [0.004077] C 2020yCat.1350....0G J 7.240 [0.023] C 2003yCat.2246....0C H 6.237 [0.017] C 2003yCat.2246....0C K 5.325 [0.017] C 2003yCat.2246....0C g 10.72 [0.03] D 2012yCat.1322....0Z r 9.70 [0.14] D 2012yCat.1322....0Z i 9.10 [0.06] D 2012yCat.1322....0Z	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: "T Tau N" = WDS J04220+1932A, "T Tau S" = WDS J04220+1932Ba,Bb

HD 284419	HIC 20390	1RXS J042200.5+193209	XEST 01-045
** GHE 6	HIP 20390	SCOPE G176.23-20.89	2XMM J042159.4+193206
AG+19 341	IRAS 04190+1924	TIC 17308640	[ABG2007] 473
AKARI-IRC-V1 J0421594+193205	JCMTSE J042159.3+193206	TYC 1272-470-1	[D98] 34
BD+19 706	JCMTSF J042159.3+193206	UBV M 28947	[GBA2007] 854
1E 0419.0+1925	JP11 3794	UCAC2 38742060	[SSZ84] T Tau N
2E 990	2MASS J04215943+1932063	UCAC4 548-009300	[SSZ84] T Tau Sb
2E 0419.0+1925	NAME T Tau A	uvby98 100284419	[SSZ84] T Tau Sa
EPIC 210777987	NAME T Tau N	V* T Tau	[SSZ84] T Tau S
EPIC 210777988	NAME T Tau S	VDB 28	AAVSO 0416+19
GBS-VLA J042159.43+193205.7	NAME T Tau IRC	WDS J04220+1932AB	Gaia DR3 48192969034959232
GCRV 2524	PLX 961.01	WEB 3899	Gaia DR1 48192969034959232
GSC 01272-00470	PPM 119824	WISE J042159.44+193205.9	Gaia DR2 48192969034959232
HBC 35	PSCz P04190+1924	WISE J042159.45+193205.9
HH 355	RAFGL 5121	XEST 01-OM-039

References (1390 between 1850 and 2023) (Total 1390) 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 : t tauri

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