NGC 6454

Basic data :
6C 174400+554318 -- 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: EmG (), Rad (2020A&A,6C,...), G (2016A&A,LEDA,...), AGN (2010A&A,[VV2003c],...), X (1E,EXSS,...), QSO (2016A&A), BiC (2011ApJ), * (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) : 17 44 56.60706225 +55 42 17.1610560 (Radio) [ 0.0558668 0.0575 0 ] A 2020A&A...644A.159C 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) : 17 44 00.58121430 +55 43 24.9072682 [ 0.0558668 0.0575 0 ] 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) : 083.72194985969 +31.34373037703 [ 0.0558668 0.0575 0 ] 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 : 0.884 0.338 [0.399 0.518 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) 8859 [~] / z(spectroscopic) 0.03 [~] / cz 8994 [~]    (Opt) D 2017ApJS..233....3T Syntax of morphological type is : mtype quality bibcode mtype : Hubble morphological class (spirals, ellipticals, etc) quality : flag of quality (A=best quality -> E=worst quality, {� } =unknown quality) bibcode : bibcode of the morphological type reference Morphological type: -3.5 D 2001ApJ...560..566K 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): 0.747 0.553 0 (NIR) C 2006AJ....131.1163S 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 13.0 [~] E ~ V 13.5 [~] E ~ G 18.306326 [0.010522] C 2020yCat.1350....0G J 10.963 [0.017] C 2006AJ....131.1163S H 10.269 [0.025] C 2006AJ....131.1163S K 10.010 [0.030] C 2006AJ....131.1163S u (AB) 15.887 [0.009] C 2009ApJS..182..543A g (AB) 13.962 [0.002] C 2009ApJS..182..543A r (AB) 13.080 [0.002] C 2009ApJS..182..543A i (AB) 12.635 [0.002] C 2009ApJS..182..543A z (AB) 12.321 [0.002] 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 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.

6C 174400+554318	IERS B1744+557	1RXS J174457.0+554217	WN B1743.9+5543B
BWE 1744+5543	JVAS J1744+5542	S4 1743+557	Z 278-24
7C 174400.29+554323.00	LEDA 60795	S4 1743+55	Z 1744.0+5543
CJF B1744+557	2MASX J17445666+5542166	SDSS J174456.60+554217.0	[PGB2011] J1744+5542
CLASS J174456.6148+554217.155	MCG+09-29-026	TGSSADR J174455.9+554215	[VV2003c] J174456.5+554216
CRATES J174455+554220	MY 174400.1+554313.8	TXS 1744+557	[VV2006c] J174456.5+554216
4CT 55.33.1	MY 174400.1+554206.0	UZC J174456.6+554217	[VV2010c] J174456.5+554216
1E 1744.0+5544	NGC 6454	VIPS J17449+5542	EQ 1744+557
EXSS 1744.0+5544	NVSS J174456+554216	VLSSr J174455.7+554217	EQ 1744+55
GB6 B1743+5543	RGB J1744.9+5542	VLSS J1744.9+5542	Gaia DR3 1418428896718957312
87GB 174400.2+554331	RGB J1744+557	WB 1744+5543	Gaia DR1 1418428892422708224
ICRF J174456.6+554217	RX J1744.9+5542	WN B1743.9+5543	Gaia DR2 1418428896718957312

References (77 between 1850 and 2024) (Total 77) 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 : NGC 6454

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