NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2021-12-08 T01:50:30 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 6988


1 objects found in NED.    

SOURCE LIST

 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 6988                       20h55m48.9s +10d30m28s G        4561  0.015214      15.0     ...    18     0   36    8     6    2     0 Retrieve Retrieve 1   

Detailed information for each object


Object No. 1 - NGC 6988

INDEX for NGC 6988
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
  • 36 Photometric data point(s) and SED   
  • Spectra   
    Redshift-Independent Distances
    18 Reference(s)   
    8 Position data point(s)
    6 Redshift data point(s)   
    2 Diameter data point(s)   

    ESSENTIAL NOTE for NGC 6988 (Back to INDEX)
    N/A

    CROSS-IDENTIFICATIONS for NGC 6988 (Back to INDEX)
    Object Names Type Object Names Type
    NGC 6988G LDCE 1427 NED003 G
    CGCG 425-020 G AGC 300084 G
    CGCG 2053.4+1020 G NPM1G +10.0499 G
    WISEA J205548.94+103028.2 IrS NSA 148810 G
    2MASX J20554892+1030282 IrS PGC 065732 G
    2MASS J20554893+1030282 IrS UZC J205548.9+103027 G
    GALEXASC J205548.97+103027.9 UvS NVSS J205548+103022 RadioS
         

    COORDINATES for NGC 6988 (Back to INDEX)

    Position Reference:1987AJ.....94..501K

    Reference    Frame     Longitude    Latitude        RA           DEC      Uncertainty Ellipse (arcsec)
                           (degrees)   (degrees)                              Semimajor Semiminor  PA(deg)
    Equatorial (B1950.0)  313.350283   10.315694 20h53m24.068s +10d18m56.50s  5.00E-01  5.00E-01    0
    Equatorial (J2000.0)  313.954012   10.507861 20h55m48.963s +10d30m28.30s  5.00E-01  5.00E-01    0
    Ecliptic   (B1950.0)  319.095910   26.675557                              5.00E-01  5.00E-01    0
    Ecliptic   (J2000.0)  319.791868   26.671718                              5.00E-01  5.00E-01    0
    Galactic               58.001231  -21.639693                              5.00E-01  5.00E-01    0
    SuperGalactic         290.159754   60.160118                              5.00E-01  5.00E-01    0
    
    Additional detailed measurements with references are also available by clicking below:
    8 Position data point(s)

    REDSHIFT-INDEPENDENT DISTANCES for NGC 6988 (Back to INDEX)
     N/A 

    CLASSIFICATIONS (TYPES, ATTRIBUTES) for NGC 6988 (Back to INDEX)
    TypeAs PublishedNED HomogenizedFlagReference Code
    KinematicsHI line widthHI line width...2005ApJS..160..149S
    2 Detailed Classification(s)


    FOREGROUND GALACTIC EXTINCTION for NGC 6988 (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]0.5800.4850.3670.2900.2010.5670.4420.3060.2270.1690.0950.0600.0400.020
    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]0.7480.5940.4560.3680.2670.7100.5220.3790.2870.2040.1240.0790.0510.021


    Galactic Extinction based on H I Column Densities and Galaxy Counts
    (Burstein & Heiles; 1982AJ.....87.1165B) assuming Rv = 3.1:
    AB = 0.380 mag
    See Notes on Galactic Extinction for important caveats.

    BASIC DATA for NGC 6988 (Back to INDEX)
    Helio. Radial Velocity     :      4561 +/-        1 km/s      
    Redshift                   :  0.015214 +/- 0.000002        2005ApJS..160..149S
    Major Diameter (arcmin)    :  0.8 
    Minor Diameter (arcmin)    :  0.8 
    Magnitude and Filter       : 15.0 
    Classifications            :                     
    
    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:
    6 Redshift data point(s)      36 photometric data point(s)      2 Diameter data point(s)      

    QUANTITIES DERIVED FROM REDSHIFT for NGC 6988 (Details)(Back to INDEX)
    Calculated and Corrected Velocities
    V (Heliocentric)           :    4561 +/-      1 km/s      2005ApJS..160..149S
    V (Kinematic LSR)          :    4575 +/-      1 km/s      1986MNRAS.221.1023K
    V (Galactocentric GSR)     :    4746 +/-      7 km/s      1991RC3.9.C...0000d
    V (Local Group)            :    4809 +/-     15 km/s      1996AJ....111..794K
    V (3K CMB)                 :    4253 +/-     22 km/s      1996ApJ...473..576F
    V (Virgo Infall only)      :    4739 +/-     16 km/s      2000ApJ...529..786M
    V (Virgo + GA only)        :    4772 +/-     16 km/s      2000ApJ...529..786M
    V (Virgo + GA + Shapley)   :    4784 +/-     16 km/s      2000ApJ...529..786M
    
    Hubble Flow Distance and Distance Modulus (where Ho =   73.0 +/-   5 km/sec/Mpc)
    D (Galactocentric GSR)     :    65.0 +/-    4.6 Mpc      (m-M) = 34.06 +/- 0.15 mag
    D (Local Group)            :    65.9 +/-    4.6 Mpc      (m-M) = 34.09 +/- 0.15 mag
    D (3K CMB)                 :    58.3 +/-    4.1 Mpc      (m-M) = 33.83 +/- 0.15 mag
    D (Virgo Infall only)      :    64.9 +/-    4.5 Mpc      (m-M) = 34.06 +/- 0.15 mag
    D (Virgo + GA only)        :    65.4 +/-    4.6 Mpc      (m-M) = 34.08 +/- 0.15 mag
    D (Virgo + GA + Shapley)   :    65.5 +/-    4.6 Mpc      (m-M) = 34.08 +/- 0.15 mag
    
    Scale at Hubble Flow Distances
    Scale (Galactocentric GSR) :     315 pc/arcsec =  0.315 kpc/arcsec =  18.91 kpc/arcmin =   1.13 Mpc/degree
    Scale (Local Group)        :     319 pc/arcsec =  0.319 kpc/arcsec =  19.16 kpc/arcmin =   1.15 Mpc/degree
    Scale (3K CMB)             :     282 pc/arcsec =  0.282 kpc/arcsec =  16.95 kpc/arcmin =   1.02 Mpc/degree
    Scale (Virgo Infall only)  :     315 pc/arcsec =  0.315 kpc/arcsec =  18.88 kpc/arcmin =   1.13 Mpc/degree
    Scale (Virgo + GA only)    :     317 pc/arcsec =  0.317 kpc/arcsec =  19.01 kpc/arcmin =   1.14 Mpc/degree
    Scale(Virgo + GA + Shapley):     318 pc/arcsec =  0.318 kpc/arcsec =  19.06 kpc/arcmin =   1.14 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 = 5.246 arcmin and Selected Redshift, defined by the Velocity Range: from to km/sec where V(Heliocentric) = 4561 km/sec
    Cosmology-Corrected Quantities [Ho = 73.00 km/sec/Mpc, Ωmatter = 0.27, Ωvacuum = 0.73] [Redshift 0.014186 as corrected to the Reference Frame defined by the 3K Microwave Background Radiation] Luminosity Distance : 58.9 Mpc (m-M) = 33.85 mag Angular-Size Distance : 57.3 Mpc (m-M) = 33.79 mag Co-Moving Radial Distance : 58.1 Mpc (m-M) = 33.82 mag Co-Moving Tangential Dist. : 58.1 Mpc (m-M) = 33.82 mag Co-Moving Volume : 0.000821 Gpc^3 Light Travel-Time : 0.188 Gyr Age at Redshift 0.014186 : 13.111 Gyr Age of Universe : 13.299 Gyr Scale (Cosmology Corrected): 278 pc/arcsec = 0.278 kpc/arcsec = 16.66 kpc/arcmin = 1.00 Mpc/degree Surface Brightness Dimming : Flux Density per Unit Area = 0.94521; Magnitude per Unit Area = 0.06118 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 6988 (Back to INDEX)
     N/A 

    QUICK-LOOK ANGULAR & PHYSICAL DIAMETERS for NGC 6988 (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]
    K_s (2MASS "total") 45.8043.0585 Diameter for "total" magnitude 20032MASX.C.......:20032MASX.C.......:14.5513.68
    NOTE: At z <= 0.5, physical diameters are derived using a Scale at the Hubble Flow Distance (Virgo + GA + Shapley) of 0.318 kpc/arcsec.
    The quantities quoted above have not necessarily been corrected for foreground extinction.

    View details for 2 Diameter data point(s) available in NED.

    EXTERNAL ARCHIVES AND SERVICES for NGC 6988 Help (Back to INDEX)
    Resources for Object NamesSite/Service
    Query SIMBAD by primary NED object name -- NGC 6988SIMBAD (CDS, Strasbourg, France)
    Revised New General Catalogue -- NGC 6988VizieR Catalog Query (U.S. mirror, CfA/Harvard)
    Original Zwicky Catalog -- CGCG 425-020 VizieR Catalog Query (U.S. mirror, CfA/Harvard)
    Query UZC Spectral Archive (60 arcsec search radius)Updated Zwicky Catalog Data (Harvard/SAO)
    2MASS Extended Source Images (JHKs) -- 2MASX J20554892+1030282 NASA/IPAC Infrared Science Archive (IRSA)
    Catalogue of Principal Galaxies -- PGC 065732 VizieR Catalog Query (U.S. mirror, CfA/Harvard)
    Retrieve mean data from LEDA -- PGC 065732 The Lyon/Meudon Extragalactic Database (LEDA)
    NRAO/VLA Sky Survey (NVSS)
    Query GALEX (NUV/FUV) Mission Archive (7.2 arcsec search radius) -- NGC 6988GALEX Mission Data Archive at MAST
    Explore IRSA resources with RADAR (10 arcsec search radius) -- NGC 6988NASA/IPAC Infrared Science Archive (IRSA)
    Resources for position 20h55m48.9s, +10d30m28s (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)
    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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