NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2022-01-20 T23:35:55 PST
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Velocity(km/s): Unconstrained
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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

Detailed Information for Object No. 5

INDEX for NGC 4688
Essential Data (jump to sub-section of this query report):

   Essential Note    
   Cross-IDs    
   Coordinates    
   Basic Data   
   Quantities Derived from Redshift    
   Redshift-Independent Distances
   Quick-Look Photometry and Luminosities
   Quick-Look Angular and Physical Sizes
   Classifications
   Foreground Galactic Extinction    
   External Services
Detailed Data (NED queries):
  • Images
  • 74 Photometric data point(s) and SED   
  • Spectra   
    Redshift-Independent Distances
    185 Reference(s)   
    33 Position data point(s)
    22 Redshift data point(s)   
    11 Diameter data point(s)   
    4 Note(s)   
    UGC data    
    RC3 data    

    ESSENTIAL NOTE for NGC 4688 (Back to INDEX)
    N/A

    CROSS-IDENTIFICATIONS for NGC 4688 (Back to INDEX)
    Object Names Type Object Names Type
    NGC 4688G HOLM 461A G
    UGC 07961 G [BEC2010] HRS 255 G
    CGCG 043-028 G MAPS-NGP O_557_1257014 G
    CGCG 1245.2+0436 G NSA 162419 G
    MCG +01-33-013 G PGC 043189 G
    WISEA J124746.51+042008.9 IrS SFRS 228 G
    2MASX J12474646+0420098 IrS UZC J124746.5+042009 G
    SDSS J124746.52+042009.7 G WVFSCC J124750+041919 RadioS
    IRAS 12452+0436 IrS WVFS J1248+0430 RadioS
    IRAS F12452+0436 IrS EVCC 1167 G
    USGC U490 NED25 G LGG 292:[G93] 051 G
    PGC1 0042734 NED013 G [HDL96] 043-024 G
    GEMS_N4636_01 G [M98j] 174 NED208 G
    HIPASS J1247+04 RadioSGEMS NGC 4636:[KFB2009] 01 RadioS
    HIR J1247+0420 RadioS    

    COORDINATES for NGC 4688 (Back to INDEX)

    Position Reference:2007SDSS6.C...0000:

    Reference    Frame     Longitude    Latitude        RA           DEC      Uncertainty Ellipse (arcsec)
                           (degrees)   (degrees)                              Semimajor Semiminor  PA(deg)
    Equatorial (B1950.0)  191.307564    4.608731 12h45m13.815s +04d36m31.43s  5.00E-01  5.00E-01    0
    Equatorial (J2000.0)  191.943848    4.336045 12h47m46.523s +04d20m09.76s  5.00E-01  5.00E-01    0
    Ecliptic   (B1950.0)  188.572185    8.712667                              5.00E-01  5.00E-01    0
    Ecliptic   (J2000.0)  189.271700    8.711124                              5.00E-01  5.00E-01    0
    Galactic              300.576157   67.191031                              5.00E-01  5.00E-01    0
    SuperGalactic         111.786214   -0.564502                              5.00E-01  5.00E-01    0
    
    Additional detailed measurements with references are also available by clicking below:
    33 Position data point(s)

    REDSHIFT-INDEPENDENT DISTANCES for NGC 4688 (Back to INDEX)

    5 Distances found in NED View 5 Individual Distance Measurement(s) for NGC 4688

    Summary Statistics computed by NED from 5 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 4688 Distance Modulus
    (mag)
    Metric Distance
    (Mpc)
    Mean 29.03 7.600
    Std. Dev. 1.37 5.496
    Min. 27.37 2.980
    Max. 31.16 17.100
    Median 28.93 6.110

    CLASSIFICATIONS (TYPES, ATTRIBUTES) for NGC 4688 (Back to INDEX)
    TypeAs PublishedNED HomogenizedFlagReference Code
    HierarchyPGParent (of companion) galaxy...1976RC2...C...0000d
    KinematicsHI line widthHI line width...1981ApJS...47..139F
    Luminosity Class6.0LC III-IV...1991RC3.9.C...0000d
    Galaxy MorphologySB(s)cdSB(s)cd...1991RC3.9.C...0000d
    Distance IndicatorTully-FisherTully-Fisher...1988NBGC.C....0000T
    25 Detailed Classification(s)


    FOREGROUND GALACTIC EXTINCTION for NGC 4688 (Back to INDEX)
    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]0.1330.1110.0840.0660.0460.1300.1010.0700.0520.0390.0220.0140.0090.005
    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]0.1670.1330.1020.0820.0600.1590.1170.0850.0640.0460.0280.0180.0110.005


    Galactic Extinction based on H I Column Densities and Galaxy Counts
    (Burstein & Heiles; 1982AJ.....87.1165B) assuming Rv = 3.1:
    AB = 0.010 mag
    See Notes on Galactic Extinction for important caveats.

    BASIC DATA for NGC 4688 (Back to INDEX)
    Helio. Radial Velocity     :       986 +/-        1 km/s      
    Redshift                   :  0.003289 +/- 0.000003        1998ApJS..119..277G
    Major Diameter (arcmin)    :   3.2
    Minor Diameter (arcmin)    :   2.8
    Magnitude and Filter       : 12.62
    Classifications            : SB(s)cd;LINER  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:
    22 Redshift data point(s)      74 photometric data point(s)      11 Diameter data point(s)      

    QUANTITIES DERIVED FROM REDSHIFT for NGC 4688 (Details)(Back to INDEX)
    Calculated and Corrected Velocities
    V (Heliocentric)           :     986 +/-      1 km/s      1998ApJS..119..277G
    V (Kinematic LSR)          :     990 +/-      1 km/s      1986MNRAS.221.1023K
    V (Galactocentric GSR)     :     917 +/-      3 km/s      1991RC3.9.C...0000d
    V (Local Group)            :     857 +/-      8 km/s      1996AJ....111..794K
    V (3K CMB)                 :    1318 +/-     23 km/s      1996ApJ...473..576F
    V (Virgo Infall only)      :     957 +/-     10 km/s      2000ApJ...529..786M
    V (Virgo + GA only)        :     990 +/-     11 km/s      2000ApJ...529..786M
    V (Virgo + GA + Shapley)   :     989 +/-     11 km/s      2000ApJ...529..786M
    Note:Object in Virgo Cluster (Radius = 10 deg; Velocity Range = 600-2300 km/sec)
     Virgo Cluster mean velocity (957 km/sec) assigned.  See Local Velocity Field Model details
    
    Hubble Flow Distance and Distance Modulus (where Ho =   73.0 +/-   5 km/sec/Mpc)
    D (Galactocentric GSR)     :    12.6 +/-    0.9 Mpc      (m-M) = 30.49 +/- 0.15 mag
    D (Local Group)            :    11.7 +/-    0.8 Mpc      (m-M) = 30.35 +/- 0.15 mag
    D (3K CMB)                 :    18.1 +/-    1.3 Mpc      (m-M) = 31.28 +/- 0.15 mag
    D (Virgo Infall only)      :    13.1 +/-    0.9 Mpc      (m-M) = 30.59 +/- 0.15 mag
    D (Virgo + GA only)        :    13.6 +/-    1.0 Mpc      (m-M) = 30.66 +/- 0.15 mag
    D (Virgo + GA + Shapley)   :    13.5 +/-    0.9 Mpc      (m-M) = 30.66 +/- 0.15 mag
    
    Scale at Hubble Flow Distances
    Scale (Galactocentric GSR) :      61 pc/arcsec =  0.061 kpc/arcsec =   3.65 kpc/arcmin =   0.22 Mpc/degree
    Scale (Local Group)        :      57 pc/arcsec =  0.057 kpc/arcsec =   3.42 kpc/arcmin =   0.20 Mpc/degree
    Scale (3K CMB)             :      88 pc/arcsec =  0.088 kpc/arcsec =   5.25 kpc/arcmin =   0.32 Mpc/degree
    Scale (Virgo Infall only)  :      64 pc/arcsec =  0.064 kpc/arcsec =   3.81 kpc/arcmin =   0.23 Mpc/degree
    Scale (Virgo + GA only)    :      66 pc/arcsec =  0.066 kpc/arcsec =   3.95 kpc/arcmin =   0.24 Mpc/degree
    Scale(Virgo + GA + Shapley):      66 pc/arcsec =  0.066 kpc/arcsec =   3.94 kpc/arcmin =   0.24 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 = 25.381 arcmin and Selected Redshift, defined by the Velocity Range: from to km/sec where V(Heliocentric) = 986 km/sec
    Cosmology-Corrected Quantities [Ho = 73.00 km/sec/Mpc, Ωmatter = 0.27, Ωvacuum = 0.73] [Redshift 0.004397 as corrected to the Reference Frame defined by the 3K Microwave Background Radiation] Luminosity Distance : 18.1 Mpc (m-M) = 31.29 mag Angular-Size Distance : 18 Mpc (m-M) = 31.27 mag Co-Moving Radial Distance : 18 Mpc (m-M) = 31.28 mag Co-Moving Tangential Dist. : 18 Mpc (m-M) = 31.28 mag Co-Moving Volume : 2.46e-05 Gpc^3 Light Travel-Time : 0.059 Gyr Age at Redshift 0.004397 : 13.240 Gyr Age of Universe : 13.299 Gyr Scale (Cosmology Corrected): 87 pc/arcsec = 0.087 kpc/arcsec = 5.23 kpc/arcmin = 0.31 Mpc/degree Surface Brightness Dimming : Flux Density per Unit Area = 0.98260; Magnitude per Unit Area = 0.01905 mag
    To change Cosmological Input Parameters for Derived Quantities: Enter Your Preferred Values and click on "Submit Changed Hubble Parameters for this object" button
    HoΩmatterΩvacuum     
    Correct Redshift To the Reference Frame defined by: as Input for Calculation of the Distances and Cosmology-Corrected Quantities

    QUICK-LOOK PHOTOMETRY and LUMINOSITIES for NGC 4688 (Back to INDEX)
     N/A 

    QUICK-LOOK ANGULAR & PHYSICAL DIAMETERS for NGC 4688 (Back to INDEX)

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

    Passband Apparent Major Axis
    (2a) [arcsec]
    Apparent Minor Axis
    (2b) [arcsec]
    PA
    [degrees]
    (J2000.0)
    Reference Level RefcodePhysical Major Axis
    (2a) [kpc]
    Physical Minor Axis
    (2b) [kpc]
    POSS1 103a-O 264.00264.00... About 25.0 B-mag arcsec^-2^ 1973UGC...C...0000N9.739.73
    K_s (2MASS "total") 90.4048.8235 Diameter for "total" magnitude 20032MASX.C.......:20032MASX.C.......:3.331.80
    NOTE: Physical diameters are derived using a scale of 0.0368 kpc/arcsec based on Average NED-D Metric Distance of (7.600 +/- 5.496) Mpc.
    The quantities quoted above have not necessarily been corrected for foreground extinction.

    View details for 11 Diameter data point(s) available in NED.

    EXTERNAL ARCHIVES AND SERVICES for NGC 4688 Help (Back to INDEX)
    Resources for Object NamesSite/Service
    Query SIMBAD by primary NED object name -- NGC 4688SIMBAD (CDS, Strasbourg, France)
    Revised New General Catalogue -- NGC 4688VizieR Catalog Query (U.S. mirror, CfA/Harvard)
    Uppsala General Catalog -- UGC 07961 VizieR Catalog Query (U.S. mirror, CfA/Harvard)
    Original Zwicky Catalog -- CGCG 043-028 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 +01-33-013 VizieR Catalog Query (U.S. mirror, CfA/Harvard)
    2MASS Extended Source Images (JHKs) -- 2MASX J12474646+0420098 NASA/IPAC Infrared Science Archive (IRSA)
    version
    SDSS Sky Server
    IRAS Faint Source Catalog -- IRAS F12452+0436 VizieR Catalog Query (U.S. mirror, CfA/Harvard)
    Catalogue of Principal Galaxies -- PGC 043189 VizieR Catalog Query (U.S. mirror, CfA/Harvard)
    Retrieve mean data from LEDA -- PGC 043189 The Lyon/Meudon Extragalactic Database (LEDA)
    Query GALEX (NUV/FUV) Mission Archive (7.2 arcsec search radius) -- NGC 4688GALEX Mission Data Archive at MAST
    Explore IRSA resources with RADAR (10 arcsec search radius) -- NGC 4688NASA/IPAC Infrared Science Archive (IRSA)
    Resources for position 12h47m46.5s, +04d20m10s (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)
    version
    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)
    The NRAO Data Archive System





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