BD+20 2465

Basic data :
V* AD Leo -- Eruptive 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: * (2023A&A,BD,...), X (2009ApJ,1AXG,...), PM* (2013MNRAS,Ci,...), UV (2016ApJ,2EUVE,...), ** (**,ADS,...), Er* (2017ARep,[GKL99]), V* (V*), Rad ([CGL99]), NIR (2MASS), MIR (WISEA), 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) : 10 19 36.2808181226 +19 52 12.010446571 (Optical) [ 0.0240 0.0243 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) : 10 16 53.8612595372 +20 07 19.170732260 [ 0.0240 0.0243 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) : 216.4560230405550 +54.5800243539671 [ 0.0240 0.0243 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 : -498.620 -43.428 [0.028 0.026 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) 12.43 [0.0002] / z(spectroscopic) 0.000041 [0.000000] / cz 12.43 [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): 201.4064 [0.0296] 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: dM3 C 2019AJ....157...63K 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 10.82 [0.01] D 2012yCat.1322....0Z V 9.52 [0.00] D 2012yCat.1322....0Z R 9.19 [0.04] D 2012yCat.1322....0Z G 8.204091 [0.002832] C 2020yCat.1350....0G J 5.449 [0.027] C 2003yCat.2246....0C H 4.843 [0.020] E 2003yCat.2246....0C K 4.593 [0.017] C 2003yCat.2246....0C g 10.124 [0.05] D 2012yCat.1322....0Z r 9.185 [0.05] D 2012yCat.1322....0Z i 7.756 [0.03] 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: According to 2022A&A...666A.143K, the possible close binary WDS J10200+1950Ca,Cb = ** BAG 32 (see B/wds/wds) is not confirmed; corresponding identifiers, including "GJ 388 A", have been removed from the list.

BD+20 2465	GCRV 6499	PLX 2420	UCAC2 38796273
** STF 1424C	GEN# +0.02002465	PLX 2420.00	UCAC4 550-048962
ADS 7724 C	GES J10193576+1952114	PM J10196+1952	USNO-B1.0 1098-00182796
AG+20 1170	G 54-23	PPM 127309	V* AD Leo
AP J10193634+1952122	GJ 388	Pul -3 660015	WEB 9274
ASCC 863621	GPM 154.902458+19.870105	RBS 855	WISEA J101935.88+195211.9
1AXG J101937+1951	IRAS 10169+2007	2RE J101936+195209	Zkh 141
CCDM J10199+1951C	JP11 62	2RE J1019+195	[CGL99] 10
Ci 18 1244	Karmn J10196+198	RE J1019+195	[FS2003] 0555
Ci 20 574	Karmn J10196+198AB	RE J101935+195212	[GKL99] 216
2E 2259	LHS 5167	RX J1019.6+1952	[JHC84] 155
2E 1016.8+2007	LSPM J1019+1952	1RXS J101936.3+195215	[R97] NGC 3227 8
1ES 1016+20.1	LTT 12761	SAO 81292	[RHG95] 1616
2EUVE J1019+19.8	2MASS J10193634+1952122	StKM 2-626	[ZEH2003] RX J1019.6+1952 3
EUVE J1019+19.8	MCC 574	TIC 95431305	Gaia DR3 625453654702751872
EXO 1016.8+2007	NLTT 24015	TYC 1423-174-1	Gaia DR2 625453654702751872
GC 14167	8pc 204.60	UBV 9550

References (1339 between 1850 and 2024) (Total 1339) 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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Archive data at HEASARC - High-Energy Astrophysics Science Archive Research Center

Data at NED - NASA/IPAC Extragalactic Database : BD+20 2465

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