NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2018-10-19 T07:13:05 PDT
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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 4918


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 4918                       13h01m50.6s -04d30m02s G        9833  0.032800      15.1     ...    10     0   19    4     1    4     0 Retrieve Retrieve 1   

Detailed information for each object


Object No. 1 - NGC 4918

INDEX for NGC 4918
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
   
19 Photometric data point(s) and SED   
Spectra   
Redshift-Independent Distances
10 Reference(s)   
4 Position data point(s)
1 Redshift data point(s)   
4 Diameter data point(s)   
RC3 data    

ESSENTIAL NOTE for NGC 4918 (Back to INDEX)
N/A

CROSS-IDENTIFICATIONS for NGC 4918 (Back to INDEX)
Object Names Type Object Names Type
NGC 4918G GALEXASC J130150.76-043002.1 UvS
2MASX J13015062-0430020 IrS 2dFGRS N131Z018 G
2MASXi J1301506-043002 IrS 2PIGG NGPGAL B+3.40016-0.07386G
2MASS J13015059-0430020 IrS PGC 044934 G
     

COORDINATES for NGC 4918 (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)  194.814682   -4.231806  12h59m15.52s  -04d13m54.5s  1.25E+00  1.25E+00    0
Equatorial (J2000.0)  195.460917   -4.500556  13h01m50.62s  -04d30m02.0s  1.25E+00  1.25E+00    0
Ecliptic   (B1950.0)  195.275089    1.934612                              1.25E+00  1.25E+00    0
Ecliptic   (J2000.0)  195.973855    1.932333                              1.25E+00  1.25E+00    0
Galactic              307.867723   58.271439                              1.25E+00  1.25E+00    0
SuperGalactic         121.244680    0.420481                              1.25E+00  1.25E+00    0
Additional detailed measurements with references are also available by clicking below:
4 Position data point(s)

REDSHIFT-INDEPENDENT DISTANCES for NGC 4918 (Back to INDEX)
 N/A 

CLASSIFICATIONS (TYPES, ATTRIBUTES) for NGC 4918 (Back to INDEX)
TypeAs PublishedNED HomogenizedFlagReference Code
HierarchyPin a pair...1976RC2...C...0000d
Galaxy MorphologySA0^+?SA0^+?...1991RC3.9.C...0000d
2 Detailed Classification(s)


FOREGROUND GALACTIC EXTINCTION for NGC 4918 (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]0.1400.1170.0880.0700.0490.1370.1070.0740.0550.0410.0230.0140.0100.005
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]0.1730.1370.1060.0850.0620.1640.1210.0880.0660.0470.0290.0180.0120.005


Galactic Extinction based on H I Column Densities and Galaxy Counts
(Burstein & Heiles; 1982AJ.....87.1165B) assuming Rv = 3.1:
AB = 0.040 mag
See Notes on Galactic Extinction for important caveats.

BASIC DATA for NGC 4918 (Back to INDEX)
Helio. Radial Velocity     :      9833 +/-       64 km/s      
Redshift                   :  0.032800 +/- 0.000213        20032dF...C...0000C
Major Diameter (arcmin)    :  1.0 
Minor Diameter (arcmin)    :  0.5 
Magnitude and Filter       : 15.1 
Classifications            : SA0+?               

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:
1 Redshift data point(s)      19 photometric data point(s)      4 Diameter data point(s)      

QUANTITIES DERIVED FROM REDSHIFT for NGC 4918 (Details)(Back to INDEX)
Calculated and Corrected Velocities
V (Heliocentric)           :    9833 +/-     64 km/s      20032dF...C...0000C
V (Kinematic LSR)          :    9837 +/-     64 km/s      1986MNRAS.221.1023K
V (Galactocentric GSR)     :    9746 +/-     64 km/s      1991RC3.9.C...0000d
V (Local Group)            :    9678 +/-     65 km/s      1996AJ....111..794K
V (3K CMB)                 :   10163 +/-     68 km/s      1996ApJ...473..576F
V (Virgo Infall only)      :    9890 +/-     66 km/s      2000ApJ...529..786M
V (Virgo + GA only)        :   10422 +/-     76 km/s      2000ApJ...529..786M
V (Virgo + GA + Shapley)   :   10454 +/-     76 km/s      2000ApJ...529..786M

Hubble Flow Distance and Distance Modulus (where Ho =   73.0 +/-   5 km/sec/Mpc)
D (Galactocentric GSR)     :   133.5 +/-    9.4 Mpc      (m-M) = 35.63 +/- 0.15 mag
D (Local Group)            :   132.6 +/-    9.3 Mpc      (m-M) = 35.61 +/- 0.15 mag
D (3K CMB)                 :   139.2 +/-    9.8 Mpc      (m-M) = 35.72 +/- 0.15 mag
D (Virgo Infall only)      :   135.5 +/-    9.5 Mpc      (m-M) = 35.66 +/- 0.15 mag
D (Virgo + GA only)        :   142.8 +/-   10.0 Mpc      (m-M) = 35.77 +/- 0.15 mag
D (Virgo + GA + Shapley)   :   143.2 +/-   10.1 Mpc      (m-M) = 35.78 +/- 0.15 mag

Scale at Hubble Flow Distances
Scale (Galactocentric GSR) :     647 pc/arcsec =  0.647 kpc/arcsec =  38.83 kpc/arcmin =   2.33 Mpc/degree
Scale (Local Group)        :     643 pc/arcsec =  0.643 kpc/arcsec =  38.57 kpc/arcmin =   2.31 Mpc/degree
Scale (3K CMB)             :     675 pc/arcsec =  0.675 kpc/arcsec =  40.50 kpc/arcmin =   2.43 Mpc/degree
Scale (Virgo Infall only)  :     657 pc/arcsec =  0.657 kpc/arcsec =  39.41 kpc/arcmin =   2.36 Mpc/degree
Scale (Virgo + GA only)    :     692 pc/arcsec =  0.692 kpc/arcsec =  41.53 kpc/arcmin =   2.49 Mpc/degree
Scale(Virgo + GA + Shapley):     694 pc/arcsec =  0.694 kpc/arcsec =  41.66 kpc/arcmin =   2.50 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 = 2.401 arcmin and Selected Redshift, defined by the Velocity Range: from to km/sec where V(Heliocentric) = 9833 km/sec
Cosmology-Corrected Quantities [Ho = 73.00 km/sec/Mpc, Ωmatter = 0.27, Ωvacuum = 0.73] [Redshift 0.033899 as corrected to the Reference Frame defined by the 3K Microwave Background Radiation] Luminosity Distance : 143 Mpc (m-M) = 35.78 mag Angular-Size Distance : 134 Mpc (m-M) = 35.63 mag Co-Moving Radial Distance : 138 Mpc (m-M) = 35.70 mag Co-Moving Tangential Dist. : 138 Mpc (m-M) = 35.70 mag Co-Moving Volume : 0.0111 Gpc^3 Light Travel-Time : 0.443 Gyr Age at Redshift 0.033899 : 12.855 Gyr Age of Universe : 13.299 Gyr Scale (Cosmology Corrected): 648 pc/arcsec = 0.648 kpc/arcsec = 38.90 kpc/arcmin = 2.33 Mpc/degree Surface Brightness Dimming : Flux Density per Unit Area = 0.87516; Magnitude per Unit Area = 0.1448 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 4918 (Back to INDEX)

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).

Spectral
Region
Band Apparent Mag or Flux Refcode Absolute Mag or νLν [W] νLν [L(Bolometric)]
UltravioletNUV (GALEX) AB 17.3891 +/- 0.0243433 mag 2012GASC..C...0000S-18.39 +/- 0.50 [mag] 3.30E+09 +/- 6.64E+08
Near-InfraredH 12.045 +/- 0.055 mag 20032MASX.C.......:-23.73 +/- 0.50 [mag] 1.81E+10 +/- 3.73E+09
NOTE: The above quantities are derived using a Distance Modulus of 35.78 mag corresponding to
a Luminosity Distance of 142.9 Mpc [assuming 10%uncertainty] using the Cosmology-Corrected Quantities.
The quantities quoted above have not necessarily been corrected for foreground extinction, and no K-Corrections have been applied.

View details and SED for 19 Photometric data point(s) available in NED.

QUICK-LOOK ANGULAR & PHYSICAL DIAMETERS for NGC 4918 (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]
RC3 D_25; R_25 (blue) 60.0027.60... 25.0 B-mag arcsec^-2^ 1991RC3.9.C...0000d41.6619.16
K_s (2MASS "total") 55.0027.5085 Diameter for "total" magnitude 20032MASX.C.......:20032MASX.C.......:38.1819.09
NOTE: At z <= 0.5, physical diameters are derived using a Scale at the Hubble Flow Distance (Virgo + GA + Shapley) of 0.694 kpc/arcsec.
The quantities quoted above have not necessarily been corrected for foreground extinction.

View details for 4 Diameter data point(s) available in NED.

EXTERNAL ARCHIVES AND SERVICES for NGC 4918 Help (Back to INDEX)
Resources for Object NamesSite/Service
Query SIMBAD by primary NED object name -- NGC 4918SIMBAD (CDS, Strasbourg, France)
Revised New General Catalogue -- NGC 4918VizieR Catalog Query (U.S. mirror, CfA/Harvard)
2MASS Extended Source Images (JHKs) -- 2MASX J13015062-0430020 NASA/IPAC Infrared Science Archive (IRSA)
2MASS Extended Source Images (JHKs) -- 2MASXi J1301506-043002 NASA/IPAC Infrared Science Archive (IRSA)
Catalogue of Principal Galaxies -- PGC 044934 VizieR Catalog Query (U.S. mirror, CfA/Harvard)
Retrieve mean data from LEDA -- PGC 044934 The Lyon/Meudon Extragalactic Database (LEDA)
Query GALEX (NUV/FUV) Mission Archive (7.2 arcsec search radius) -- NGC 4918GALEX Mission Data Archive at MAST
Explore IRSA resources with RADAR (10 arcsec search radius) -- NGC 4918NASA/IPAC Infrared Science Archive (IRSA)
Resources for position 13h01m50.6s, -04d30m02s (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)
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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