7C 1218+3359

Basic data :
7C 1218+3359 -- Quasar 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: Rad (2020A&A,7C,...), QSO (2011MNRAS,QSO,...), X (2007AJ,2E,...), AGN (2007AJ), G (LEDA), * (Gaia), Opt (SDSS) 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) : 12 20 33.8756544048 +33 43 12.026168040 (Optical) [ 0.1072 0.1058 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) : 12 18 03.8929572955 +33 59 50.503226044 [ 0.1072 0.1058 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) : 166.3071676869163 +80.6388855750234 [ 0.1072 0.1058 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 : -0.109 0.121 [0.107 0.131 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) 218707 [63] / z(spectroscopic) 1.52873 [0.00021] / cz 458301.7 [63.0]    (Opt) C 2015ApJS..219...12A 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 (8) : B 18.80 [~] D 2010A&A...518A..10V V 18.61 [~] D 2010A&A...518A..10V G 18.355211 [0.010513] C 2020yCat.1350....0G u (AB) 19.200 [0.027] C 2015ApJS..219...12A g (AB) 18.799 [0.009] B 2015ApJS..219...12A r (AB) 18.454 [0.008] B 2015ApJS..219...12A i (AB) 18.124 [0.009] B 2015ApJS..219...12A z (AB) 18.079 [0.021] C 2015ApJS..219...12A	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: See also Specfind radio flux densities.

7C 1218+3359	87GB 121803.4+340015	QSO J1220+3343	[HBS81] 3C 270.1 1
B2.1 1218+33	GRA J1220+33	RGB J1220.6+3343	[S77] 200
B2 1218+33	GRA B1217+33	RX J1220.5+3343	[VV2000] J122033.9+334312
BWE 1218+3400	ICRF J122033.8+334312	1RXS J122032.4+334332	[VV2003] J122033.9+334312
3C 270.1	IERS B1218+339	SDSS J122033.87+334312.0	[VV2006] J122033.9+334312
4C 33.29	IVS B1218+339	SDSS J122033.86+334312.0	[VV2010] J122033.9+334312
3CR 270.1	LEDA 2820304	TXS 1218+339	[VV96] J122033.9+334312
DA 320	MITG J122033+3342	UT 1218+339	[VV98] J122033.9+334312
2E 2664	MY 121803.0+334258.1	WB 1218+3400	[WTW94] 1218+339
2E 1218.0+3400	NRAO 396	WN B1218.0+3359	[ZEH2003] RX J1220.5+3343 2
FIRST J122033.6+334315	NVSS J122033+334310	[ATZ98] D108	Gaia DR3 4016750687638611584
FIRST J122033.8+334307	OHIO N 330	[D71] 1218+33	Gaia DR1 4016750687638611584
GB2 1218+339	QSO B1218+3359	[GW2008] CoNFIG 132	Gaia DR2 4016750687638611584
GB6 B1218+3359	QSO B1218+339	[HB93] 1218+339

References (266 between 1850 and 2024) (Total 266) 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 : 7C 1218+3359

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