coord 08 23 24.7565 +22 23 03.302 (FK5, 2000, 2000), radius: 1 arcmin

Query : coord 08 23 24.7565 +22 23 03.302 (FK5, 2000, 2000), radius: 1 arcmin
CLEAR

Basic data :
4C 22.21 -- BL Lac
Distance to the center arcsec: 0.07
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 (2014ApJS,4C,...), QSO (2016A&A,QSO,...), BLL (2008AJ,[VV98b]), Bla ([DGT2001],[MGL2009],...), G (2022ApJS,LEDA), MIR (WISEA,WISE), AGN (2020MNRAS), * (Gaia), X (2009A&A), NIR (2MASS), IR (2MASSI), 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) : 		08 23 24.7592164368 +22 23 03.287299236 (Optical) [ 0.0836 0.0601 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) : 		08 20 28.5260080449 +22 32 45.014833112 [ 0.0836 0.0601 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) : 		201.3642870823441 +29.6767512087320 [ 0.0836 0.0601 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 : 		-0.140 -0.219 [0.105 0.080 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) 246782 [438] / z(spectroscopic) 2.21102 [0.00146] / cz 662847.1 [437.7]
   D 2009ApJS..182..543A
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 20.22 [~] D 2010A&A...518A..10V
V 19.57 [~] D 2010A&A...518A..10V
R 19.7 [~] E 2007ApJ...667..673G
G 17.679178 [0.012119] C 2020yCat.1350....0G
H 16.386 [0.225] D 2003yCat.2246....0C
K 15.364 [0.123] D 2003yCat.2246....0C
u (AB) 20.454 [0.066] C 2009ApJS..182..543A
g (AB) 19.933 [0.017] C 2009ApJS..182..543A
r (AB) 19.423 [0.015] C 2009ApJS..182..543A
i (AB) 18.961 [0.012] C 2009ApJS..182..543A
z (AB) 18.569 [0.030] 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 Simbad points in this preview
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sedIcon
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!). sed-help-icon
Some important notes on this object about identifications and objects associations.
notes:

The link on the acronym of the identifiers give access to the information for this acronym in the dictionary of nomenclature.
Identifiers (62) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

4C 22.21 IERS B0820+225 PKS 0820+225 WISE J082324.75+222303.2
B2 0820+22 IVS B0820+225 QSO B0820+225 [DGT2001] B0820+225
B2.4 0820+22 JVAS J0823+2223 RFC J0823+2223 [GW2008] CoNFIG 19
BWE 0820+2233 JVAS B0820+225 S3 0820+22 [HB93] 0820+225
7C 082028.50+223242.00 1Jy 0820+22 SDSS J082324.75+222303.2 [MGL2009] BZB J0823+2223
CLASS J082324.7564+222303.302 1Jy 0820+225 TGSSADR J082324.7+222303 [MML2015] 5BZB J0823+2223
CRATES J082324+222314 LEDA 2819732 TIC 14566237 [VV2000] J082324.8+222303
CRTS MLS120126 J082325+222303 2MASS J08232476+2223036 TXS 0820+225 [VV2003] J082324.8+222303
Cul 0820+225 2MASSI J0823247+222303 VCS1 J0823+2223 [VV2006] J082324.8+222303
DA 249 MITG J082325+2223 VIPS J08234+2223 [VV2010] J082324.8+222303
F2M J082324.76+222303.3 MITG J0823+2223 VLSSr J082325.0+222300 [VV98b] J082324.8+222303
FIRST J082324.7+222303 NRAO 0820+22 VLSS J0823.4+2223 Gaia DR3 676375886481155968
GB6 B0820+2232 NVSS J082324+222303 VRO 22.08.03 Gaia DR1 676375882181102592
87GB 082028.4+223300 OHIO J 233 VSOP J0823+2223 Gaia DR2 676375886481155968
GLEAM J082324+222306 PKS 0820+22 WB 0820+2233
ICRF J082324.7+222303 PKS J0823+2223 WISEA J082324.75+222303.2

References (180 between 1850 and 2024) (Total 180)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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                Reference summaries :

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Collections of Measurements


velocities : 6    PM : 2   

   

External archives :

Data at NED - NASA/IPAC Extragalactic Database : 4C 22.21

Link by name to the catalogue in VizieR :

4C 22.21 BWE 0820+2233 FIRST J082324.7+222303 IERS B0820+225 2MASS J08232476+2223036
2MASSI J0823247+222303 MITG J082325+2223 MITG J0823+2223 NVSS J082324+222303 PKS 0820+22
PKS J0823+2223 PKS 0820+225 SDSS J082324.75+222303.2 VSOP J0823+2223 WISEA J082324.75+222303.2
WISE J082324.75+222303.2 Gaia DR3 676375886481155968 Gaia DR1 676375882181102592 Gaia DR2 676375886481155968

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