ngc4490

Basic data :
NGC 4490 -- Galaxy in Pair of Galaxies 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: G (2014AJ,APG,...), Rad (B3,BWE,...), IR (IRAS,ISOSS,...), GiP (KPG,[T76]), GiG ([CHM2007]), IG (VV), X (RX), HI ([KOV2009]), 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 30 34.5 +41 38 26 (Radio) [ 670 670 0 ] C 1997A&AS..122..235L 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 28 08.4 +41 55 00 [ 670 670 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) : 138.0198 +74.8709 [ 670 670 0 ] 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) 588 [19] / z(~) 0.00196 [0.00006] / cz 589.0 [19.0]    D 1999PASP..111..438F 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: SAB C 2019MNRAS.488..590B 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): 6.76 2.14 151 (Opt) D 2003A&A...412...45P 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) : U 10.03 [0.06] D 2007ApJS..173..185G B 10.22 [0.06] D 2007ApJS..173..185G V 9.79 [0.06] D 2007ApJS..173..185G J 8.208 [0.019] C 2006AJ....131.1163S H 7.643 [0.023] C 2006AJ....131.1163S K 7.352 [0.027] C 2006AJ....131.1163S u (AB) 12.291 [0.003] C 2009ApJS..182..543A g (AB) 11.235 [0.002] C 2009ApJS..182..543A r (AB) 10.887 [0.002] C 2009ApJS..182..543A i (AB) 10.676 [0.003] C 2009ApJS..182..543A z (AB) 10.421 [0.003] 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: In pair with NGC 4485 See GALEX UV data in GALEX data See also Specfind radio flux densities.

NGC 4490	KPG 341	RGB J1230.6+4138	Z 216-8
APG 269	KPG 341b	RGB J1230+416	Z 1228.1+4155
B3 1228+419A	KUG 1228+419	RX J1230.5+4139	[CAB95] IRAS F12281+4155
B3 1228+419	LEDA 41333	SDSS J123036.08+413835.6	[CHM2007] HDC 706 J123036.36+4138370
BWE 1228+4155	2MASX J12303636+4138370	SDSS J123036.23+413840.7	[CHM2007] LDC 867 J123036.36+4138370
6C 122808+415538	2MASXI J1230368+413825	TC 785	[H92] 25
7C 122808.30+415532.00	MCG+07-26-014	UGC 7651	[KOV2009] 67A
GB6 B1228+4155	MY 122809.4+415548.4	UZC J123036.1+413834	[M98c] 122810.5+415456
87GB 122809.0+415515	MY 122809.4+413914.6	VV 30a	[NKB95] N4490
IRAS F12281+4155	NAME Cocoon Galaxy	VV 30	[SLK2004] 716
IRAS 12281+4155	NVSS J123035+413851	WB 1228+4155	[T76] 69B
ISOSS J12305+4139	PSCz Q12281+4155	WN B1228.1+4155	[VDD93] 162

References (563 between 1850 and 2023) (Total 563) 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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External archives :

Archive data at HEASARC - High-Energy Astrophysics Science Archive Research Center

Data at NED - NASA/IPAC Extragalactic Database : ngc4490

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