Date and Time of the Query: 2019-02-23 T21:15:31 PST
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You have selected the following parameters to search on:

Parameters for Distances and Cosmology: Ho= 73.0; Ωmatter = 0.27; Ωvacuum = 0.73;
Derived Quantities use a Redshift corrected to a Reference Frame defined by the 3K CMB

NED results for object NGC 4631

1 objects found in NED.    


 Row          Object Name                 EquJ2000.0       Object  Velocity/Redshift    Mag./  Separ.               Number of                                 Row 
 No.     (* => Essential Note)       RA               DEC  Type     km/s       z   Qual Filter arcmin Refs Notes Phot Posn Vel/z Diam Assoc Images   Spectra  No. 
1    NGC 4631                       12h42m08.0s +32d32m29s G         606  0.002021       9.75    ...   757    25  235   46    29    7     0 Retrieve Retrieve 1   

Detailed information for each object

Object No. 1 - NGC 4631

INDEX for NGC 4631
Essential Data (jump to sub-section of this query report):

   Essential Note    
   Basic Data   
   Quantities Derived from Redshift    
   Redshift-Independent Distances
   Quick-Look Photometry and Luminosities
   Quick-Look Angular and Physical Sizes
   Foreground Galactic Extinction    
   External Services
Detailed Data (NED queries):

235 Photometric data point(s) and SED   
Redshift-Independent Distances
757 Reference(s)   
46 Position data point(s)
29 Redshift data point(s)   
7 Diameter data point(s)   
25 Note(s)   
UGC data    
RC3 data    


Object Names Type Object Names Type
NGC 4631G 11HUGS 303 G
UGC 07865 G MG2 J124203+3232 RadioS
ARP 281 NED02 G 87GB 123941.4+324853 RadioS
KUG 1239+328B G 87GB[BWE91] 1239+3248 RadioS
CGCG 188-016 G [WB92] 1239+3248 RadioS
CGCG 1239.7+3249 G NVSS J124208+323231 RadioS
MCG +06-28-020 G VLSS J1242.1+3232 RadioS
B2 1239+32 RadioS6C B123939.0+324855 RadioS
2MASX J12420800+3232294 IrS 7C 1239+3248 RadioS
IRAS 12396+3249 IrS Cul 1239+328 RadioS
IRAS F12396+3249 IrS GB2 1239+328 RadioS
AKARI J1242080+323231 IrS HIJASS J1242+32 G
ISOSS J12421+3232 IrS EXSS 1239.6+3248 XrayS
KPG 350A G LGG 291:[G93] 005 G
LDCE 0867 NED124 G [DFO95] 035 G
HDCE 0706 NED078 G [M98j] 177 NED04 G
USGC U500 NED03 G [KVB99] 31 G
EON J190.533+32.541 G [CRJ2004] J1242.1+3232 RadioS
HOLM 442A G [SLK2004] 0730 IrS
NSA 141970 G WSRT-CVn [KOV2009] 64 RadioS
PGC 042637 G    
UZC J124208.0+323226 G    

COORDINATES for NGC 4631 (Back to INDEX)

Position Reference:20032MASX.C.......:

Reference    Frame     Longitude    Latitude        RA           DEC      Uncertainty Ellipse (arcsec)
                       (degrees)   (degrees)                              Semimajor Semiminor  PA(deg)
Equatorial (B1950.0)  189.924415   32.815420  12h39m41.86s  +32d48m55.5s  1.25E+00  1.25E+00    0
Equatorial (J2000.0)  190.533375   32.541500  12h42m08.01s  +32d32m29.4s  1.25E+00  1.25E+00    0
Ecliptic   (B1950.0)  174.292534   33.698454                              1.25E+00  1.25E+00    0
Ecliptic   (J2000.0)  174.995397   33.698567                              1.25E+00  1.25E+00    0
Galactic              142.805542   84.223494                              1.25E+00  1.25E+00    0
SuperGalactic          84.220461    5.741832                              1.25E+00  1.25E+00    0
Additional detailed measurements with references are also available by clicking below:
46 Position data point(s)


18 Distances found in NED View 18 Individual Distance Measurement(s) for NGC 4631

Summary Statistics computed by NED from 18 Distance(s) in the literature:
NOTE: These summary statistics are provided for "quick-look" reference only;
they are based exclusively on original values, as published.
No homogenization or corrections have been applied.

NGC 4631 Distance Modulus
Metric Distance
Mean 28.45 5.097
Std. Dev. 0.62 1.537
Min. 27.53 3.200
Max. 29.41 7.620
Median 28.18 4.330

TypeAs PublishedNED HomogenizedFlagReference Code
HierarchyPPPair member (points to parent)...1972AISAO...7....3K
KinematicsHI line widthHI line width...1999A&AS..135..255K
Luminosity Class7.0LC IV...1991RC3.9.C...0000d
Galaxy MorphologySB(s)d edge-onSB(s)d edge-on...1991RC3.9.C...0000d
Distance IndicatorTully-FisherTully-Fisher...2009AJ....138..323T
58 Detailed Classification(s)

Galactic Extinction from the Schlafly & Finkbeiner 2011, Appendix; 2011ApJ...737..103S (SF11) recalibration 
of the Schlegel, Finkbeiner & Davis 1998, Appendix B; 1998ApJ...500..525S (SFD98) infrared-based dust map.
The map is based on dust emission from COBE/DIRBE and IRAS/ISSA;
the recalibration assumes a Fitzpatrick (1999PASP..111...63F) reddening law with Rv = 3.1 and different source spectrum than SFD98.

L a n d o l tS D S SU K I R T
Filter [µm]U (0.35)B (0.43)V (0.54)R (0.64)I (0.80)u (0.36)g (0.47)r (0.62)i (0.75)z (0.89)J (1.25)H (1.66)K (2.19)L' (3.78)
Aλ [mag]0.0740.0620.0470.0370.0260.0720.0560.0390.0290.0220.0120.0080.0050.003
Show/Hide Aλ magnitudes in all 88 photometric bands based on SF11
For completeness, we include the original SFD98 values:
L a n d o l tS D S SU K I R T
Filter [µm]U (0.34)B (0.44)V (0.54)R (0.65)I (0.81)u (0.35)g (0.49)r (0.63)i (0.78)z (0.93)J (1.27)H (1.67)K (2.22)L' (3.81)
Aλ [mag]0.0920.0730.0560.0450.0330.0880.0640.0470.0350.0250.0150.0100.0060.003

Galactic Extinction based on H I Column Densities and Galaxy Counts
(Burstein & Heiles; 1982AJ.....87.1165B) assuming Rv = 3.1:
AB = 0.030 mag
See Notes on Galactic Extinction for important caveats.

BASIC DATA for NGC 4631 (Back to INDEX)
Helio. Radial Velocity     :       606 +/-        3 km/s      
Redshift                   :  0.002021 +/- 0.000010        1991RC3.9.C...0000d
Major Diameter (arcmin)    :  15.5
Minor Diameter (arcmin)    :   2.7
Magnitude and Filter       :  9.75
Classifications            : SB(s)d         HII  

NOTE: This information is indicative only. With the exception of the
      redshift they are unreferenced and highly inhomogeneous as to
      their origin. The Radial Velocity (when available) is computed
      from the listed redshift. The remaining values are designed to
      orient the user with a quick-look, overall assessment of the
      general properties of the object in question. They are not
      averages nor are they standardized in any way.
Additional detailed measurements with references are also available by clicking below:
29 Redshift data point(s)      235 photometric data point(s)      7 Diameter data point(s)      

Calculated and Corrected Velocities
V (Heliocentric)           :     606 +/-      3 km/s      1991RC3.9.C...0000d
V (Kinematic LSR)          :     614 +/-      3 km/s      1986MNRAS.221.1023K
V (Galactocentric GSR)     :     626 +/-      3 km/s      1991RC3.9.C...0000d
V (Local Group)            :     604 +/-      3 km/s      1996AJ....111..794K
V (3K CMB)                 :     868 +/-     19 km/s      1996ApJ...473..576F
V (Virgo Infall only)      :     506 +/-      8 km/s      2000ApJ...529..786M
V (Virgo + GA only)        :     551 +/-      8 km/s      2000ApJ...529..786M
V (Virgo + GA + Shapley)   :     553 +/-      8 km/s      2000ApJ...529..786M

Hubble Flow Distance and Distance Modulus (where Ho =   73.0 +/-   5 km/sec/Mpc)
D (Galactocentric GSR)     :    8.58 +/-   0.60 Mpc      (m-M) = 29.67 +/- 0.15 mag
D (Local Group)            :    8.28 +/-   0.58 Mpc      (m-M) = 29.59 +/- 0.15 mag
D (3K CMB)                 :   11.90 +/-   0.87 Mpc      (m-M) = 30.38 +/- 0.15 mag
D (Virgo Infall only)      :    6.93 +/-   0.50 Mpc      (m-M) = 29.21 +/- 0.15 mag
D (Virgo + GA only)        :    7.55 +/-   0.53 Mpc      (m-M) = 29.39 +/- 0.15 mag
D (Virgo + GA + Shapley)   :    7.58 +/-   0.53 Mpc      (m-M) = 29.40 +/- 0.15 mag

Scale at Hubble Flow Distances
Scale (Galactocentric GSR) :      42 pc/arcsec =  0.042 kpc/arcsec =   2.50 kpc/arcmin =   0.15 Mpc/degree
Scale (Local Group)        :      40 pc/arcsec =  0.040 kpc/arcsec =   2.41 kpc/arcmin =   0.14 Mpc/degree
Scale (3K CMB)             :      58 pc/arcsec =  0.058 kpc/arcsec =   3.46 kpc/arcmin =   0.21 Mpc/degree
Scale (Virgo Infall only)  :      34 pc/arcsec =  0.034 kpc/arcsec =   2.02 kpc/arcmin =   0.12 Mpc/degree
Scale (Virgo + GA only)    :      37 pc/arcsec =  0.037 kpc/arcsec =   2.20 kpc/arcmin =   0.13 Mpc/degree
Scale(Virgo + GA + Shapley):      37 pc/arcsec =  0.037 kpc/arcsec =   2.20 kpc/arcmin =   0.13 Mpc/degree

To Search for Nearby Objects (Physical Companions): Enter Your Preferred Values and click on "Submit Environment Search" button
Search for Objects within +/-arcmin where 100 kpc = 45.365 arcmin and Selected Redshift, defined by the Velocity Range: from to km/sec where V(Heliocentric) = 606 km/sec
Cosmology-Corrected Quantities [Ho = 73.00 km/sec/Mpc, Ωmatter = 0.27, Ωvacuum = 0.73] [Redshift 0.002897 as corrected to the Reference Frame defined by the 3K Microwave Background Radiation] Luminosity Distance : 11.9 Mpc (m-M) = 30.38 mag Angular-Size Distance : 11.9 Mpc (m-M) = 30.37 mag Co-Moving Radial Distance : 11.9 Mpc (m-M) = 30.38 mag Co-Moving Tangential Dist. : 11.9 Mpc (m-M) = 30.38 mag Co-Moving Volume : 7.04e-06 Gpc^3 Light Travel-Time : 0.039 Gyr Age at Redshift 0.002897 : 13.260 Gyr Age of Universe : 13.299 Gyr Scale (Cosmology Corrected): 57 pc/arcsec = 0.057 kpc/arcsec = 3.45 kpc/arcmin = 0.21 Mpc/degree Surface Brightness Dimming : Flux Density per Unit Area = 0.98850; Magnitude per Unit Area = 0.01256 mag
To change Cosmological Input Parameters for Derived Quantities: Enter Your Preferred Values and click on "Submit Changed Hubble Parameters for this object" button
Correct Redshift To the Reference Frame defined by: as Input for Calculation of the Distances and Cosmology-Corrected Quantities


The brightest flux in each of the following spectral regions, when available:
Gamma-Ray (ν > 2E19 Hz); X-Ray (2E19 Hz > ν > 2E16 Hz); Ultraviolet (2E16 Hz > ν > 9E14 Hz); Visual (9E14 Hz > ν > 3E14 Hz);
Near-Infrared (3E14 Hz > ν > 6E13 Hz); Mid-Infrared (6E13 Hz > ν > 7.5E12 Hz); Far-Infrared (7.5E12 Hz > ν > 1E12 Hz);
Sub-Millimeter (1E12 Hz > ν > 3E11 Hz); Millimeter (3E11 Hz > ν > 3E10 Hz); Radio (3E10 Hz > ν).

Band Apparent Mag or Flux Refcode Absolute Mag or νLν [W] νLν [L(Bolometric)]
X-Ray0.2-4 keV (EINSTEIN) 13.81E-13 ergs sec^-1^ cm^-2^ 1992ApJS...80..531F 4.29E+32 [W] 1.12E+06
UltravioletUV_3150 (m_T) 9.36 +/- 0.52 mag 1995A&AS..114..527R-19.09 +/- 0.63 [mag] 1.67E+09 +/- 1.05E+09
VisualV (V_T^0) 8.06 mag 1991RC3.9.C...0000d-20.39 [mag] 9.51E+09
Near-InfraredH_tot (2MASS LGA) 6.826 +/- 0.025 mag 2003AJ....125..525J-21.62 +/- 0.36 [mag] 2.81E+09 +/- 4.05E+08
Mid-Infrared25 microns (IRAS) 11.24 +/- 0.68 Jy 2004AJ....127.3235S 4.18E+35 +/- 6.46E+34 [W] 1.09E+09 +/- 1.68E+08
Far-InfraredFIR (IRAS) 5.32E-12 W m^-2^ 1988ApJS...68...91R 1.65E+36 [W] 4.28E+09
Sub-Millimeter350 microns (SPIRE) 5.45E+1 +/- 0.39E+1 Jy 2012ApJ...745...95D 1.45E+35 +/- 2.31E+34 [W] 3.78E+08 +/- 6.01E+07
Millimeter1.3 mm 3.1 +/- 0.7 Jy 1986A&A...166L...8C 2.23E+33 +/- 5.94E+32 [W] 5.79E+06 +/- 1.54E+06
Radio80 MHz 5. Jy 1995AuJPh..48..143S 1.24E+30 [W] 3.23E+03
NOTE: The above quantities are derived using an estimated Distance Modulus of (28.45 +/- 0.62) mag corresponding to
a Metric Distance of (5.097 +/- 1.537) Mpc using the Average NED-D value.
The quantities quoted above have not necessarily been corrected for foreground extinction, and no K-Corrections have been applied.

View details and SED for 235 Photometric data point(s) available in NED.


The largest diameters in the Visual and Near-Infrared spectral regions, when available:

Passband Apparent Major Axis
(2a) [arcsec]
Apparent Minor Axis
(2b) [arcsec]
Reference Level RefcodePhysical Major Axis
(2a) [kpc]
Physical Minor Axis
(2b) [kpc]
POSS1 103a-O 1020.00214.2085 About 25.0 B-mag arcsec^-2^ 1973UGC...C...0000N25.215.29
K_s (LGA/2MASS "total") 828.80248.6483 Diameter for "total" magnitude 2003AJ....125..525J2003AJ....125..525J20.486.14
NOTE: Physical diameters are derived using a scale of 0.0247 kpc/arcsec based on Average NED-D Metric Distance of (5.097 +/- 1.537) Mpc.
The quantities quoted above have not necessarily been corrected for foreground extinction.

View details for 7 Diameter data point(s) available in NED.

Resources for Object NamesSite/Service
Query SIMBAD by primary NED object name -- NGC 4631SIMBAD (CDS, Strasbourg, France)
Revised New General Catalogue -- NGC 4631VizieR Catalog Query (U.S. mirror, CfA/Harvard)
Uppsala General Catalog -- UGC 07865 VizieR Catalog Query (U.S. mirror, CfA/Harvard)
Original Zwicky Catalog -- CGCG 188-016 VizieR Catalog Query (U.S. mirror, CfA/Harvard)
Query UZC Spectral Archive (60 arcsec search radius)Updated Zwicky Catalog Data (Harvard/SAO)
Morphological Catalog of Galaxies -- MCG +06-28-020 VizieR Catalog Query (U.S. mirror, CfA/Harvard)
The Second Bologna Survey -- B2 1239+32 VizieR Catalog Query (U.S. mirror, CfA/Harvard)
2MASS Extended Source Images (JHKs) -- 2MASX J12420800+3232294 NASA/IPAC Infrared Science Archive (IRSA)
IRAS Point Source Catalog -- IRAS 12396+3249 VizieR Catalog Query (U.S. mirror, CfA/Harvard)
IRAS Faint Source Catalog -- IRAS F12396+3249 VizieR Catalog Query (U.S. mirror, CfA/Harvard)
Catalogue of Principal Galaxies -- PGC 042637 VizieR Catalog Query (U.S. mirror, CfA/Harvard)
Retrieve mean data from LEDA -- PGC 042637 The Lyon/Meudon Extragalactic Database (LEDA)
NRAO/VLA Sky Survey (NVSS)
Query GALEX (NUV/FUV) Mission Archive (7.2 arcsec search radius) -- NGC 4631GALEX Mission Data Archive at MAST
Explore IRSA resources with RADAR (10 arcsec search radius) -- NGC 4631NASA/IPAC Infrared Science Archive (IRSA)
Resources for position 12h42m08.0s, +32d32m29s (J2000)Site/Service
Query Optical and UV Mission Archives (Default search radius)Multimission Archive at STScI (MAST)
Query High Energy Mission Archives (Default search radius)HEASARC (NASA/GSFC)
Explore resources with DataScope (15 arcmin search radius)HEASARC (NASA/GSFC)
SDSS Sky Server
Query IRSA for WISE images (10 arcmin search radius)NASA/IPAC Infrared Science Archive (IRSA)
Band(s): Size:
NASA/IPAC Infrared Science Archive (IRSA)
Band(s): Size:
NASA/IPAC Infrared Science Archive (IRSA)
NASA/IPAC Infrared Science Archive (IRSA)
 Size:    Contours (PS)  JPEG  FITS File 
NRAO/VLA Sky Survey (NVSS)
    Size:     GIF     FITS File  
Faint Images of the Radio Sky at Twenty-Centimeters
The NRAO Data Archive System

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