au mic

Basic data :
HD 197481 -- BY Dra 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: * (HD,CD,...), PM* (2013MNRAS,Ci,...), X (2015A&A,1AXG,...), ** (**,CCDM,...), V* (ASAS,1SWASP,...), UV (2EUVE,EUVE,...), MIR (AKARI,WISEA,...), Er* (2020AJ,[GKL99]), LM* (2019AJ), BY* (2017ARep), NIR (2MASS), IR (IRAS) 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) : 20 45 09.5324974119 -31 20 27.237889841 (Optical) [ 0.0173 0.0113 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) : 20 42 03.7916989382 -31 31 05.551562626 [ 0.0173 0.0113 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) : 012.6546144900849 -36.8024952537245 [ 0.0173 0.0113 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 : 281.319 -360.148 [0.022 0.019 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) -4.71 [0.0013] / z(spectroscopic) -0.000016 [0.000000] / cz -4.71 [0.00]    (Opt) A 2018MNRAS.475.1960F 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): 102.9432 [0.0231] 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: M1VeBa1 C 1989ApJS...71..245K 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 (11) : B 10.05 [~] E ~ V 8.627 [0.052] C 2012AcA....62...67K R 9.078 [0.06] D 2012yCat.1322....0Z G 7.843440 [0.002890] C 2020yCat.1350....0G I 6.593 [0.029] C 2012AcA....62...67K J 5.436 [0.017] C 2003yCat.2246....0C H 4.831 [0.016] C 2003yCat.2246....0C K 4.529 [~] D 2010PASP..122..885S g 9.579 [0.05] D 2012yCat.1322....0Z r 8.636 [0.09] D 2012yCat.1322....0Z i 7.355 [0.14] E 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!).

HD 197481	GCRV 12995	PM J20451-3120	UCAC4 294-224065
** LDS 720A	GEN# +1.00197481	PPM 300560	UGP 505
AKARI-IRC-V1 J2045097-312029	GJ 803	RBS 1695	V* AU Mic
ASAS J204510-3120.4	HIC 102409	2RE J2045-312	WDS J20452-3120A
ASAS J204509-3120.3	HIP 102409	2RE J204510-312000	WEB 18541
1AXG J204508-3119	IDS 20390-3142 A	RE J2045-312	WISEA J204509.75-312030.9
CCDM J20451-3122A	IRAS 20420-3131	RE J204509-312004	WISE J204509.76-312030.9
CD-31 17815	IRAS F20420-3131	RX J2045.2-3120	Zkh 310
Ci 20 1225	Karmn J20451-313	1RXS J204509.4-312023	[FS2003] 1089
CPC 17 11323	LTT 8214	SAO 212402	[GKL99] 394
CPD-31 6335	2MASS J20450949-3120266	1SWASP J204509.52-312027.2	[L91b] 329
2E 4416	MCC 824	TIC 441420236	[RHG95] 3241
2E 2042.0-3131	NLTT 49807	TOI-2221	Gaia DR3 6794047652729201024
2EUVE J2045-31.3	PLX 4939	TYC 7457-641-1	Gaia DR2 6794047652729201024
EUVE J2045-31.3	PLX 4939.00	UBV 17963

References (1104 between 1850 and 2023) (Total 1104) 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 : au mic

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