NGC 4490

Query : NGC 4490

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]), AG? (2020MNRAS), 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 Simbad points in this preview
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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:

Hierarchy : number of linked objects
whatever the membership probability is (see description here ) :

: 5
The count displayed here is the number of children objects.
The list obtained by clicking the button may be larger, as some children may be linked with different references or probability.

%This number is the number of distinct objets linked, by using this button, you will obtain all links (may be more than one) from that object to his children

: 62 		: 154 Display criteria :

The link on the acronym of the identifiers give access to the information for this acronym in the dictionary of nomenclature.
Identifiers (48) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

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 (574 between 1850 and 2024) (Total 574)
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 : 13    distance : 6   

   

Observing logs


ISO : 4    XMM : 1   

   

External archives :

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

Data at NED - NASA/IPAC Extragalactic Database : NGC 4490

Link by name to the catalogue in VizieR :

NGC 4490 APG 269 BWE 1228+4155 IRAS F12281+4155 IRAS 12281+4155
KPG 341 KPG 341b KUG 1228+419 2MASX J12303636+4138370 NVSS J123035+413851
SDSS J123036.08+413835.6 SDSS J123036.23+413840.7 UGC 7651 WN B1228.1+4155

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Annotations :
Annotations allow a user to add a note or report an error concerning the astronomical object and its data. It requires registration to post a note. See description .
Please, have a look at Best practices. The list of all annotations to SIMBAD objects can be found here .

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