NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-06-24 T20:52:55 PDT
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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. 1

INDEX for IC 4908
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
   
27 Photometric data point(s) and SED   
Spectra   
Redshift-Independent Distances
14 Reference(s)   
5 Position data point(s)
5 Redshift data point(s)   
16 Diameter data point(s)   
ESO data    
RC3 data    

ESSENTIAL NOTE for IC 4908 (Back to INDEX)
N/A

CROSS-IDENTIFICATIONS for IC 4908 (Back to INDEX)
Object Names Type Object Names Type
IC 4908G ESO-LV 1850300 G
ESO 185- G 030 G 6dF J1956567-554730 G
ESO 195256-5555.5 G LDCE 1383 NED011 G
FAIRALL 0522 G HDCE 1090 NED001 G
2MASX J19565666-5547301 IrS PGC 063855 G
2MASS J19565666-5547300 IrS [RFG96] 195259.0-555530 G
GALEXASC J195656.81-554730.0 UvS [DZ2015] 054-04 G
     

COORDINATES for IC 4908 (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)  298.235298  -55.925602  19h52m56.47s  -55d55m32.2s  1.25E+00  1.25E+00    0
Equatorial (J2000.0)  299.236125  -55.791722  19h56m56.67s  -55d47m30.2s  1.25E+00  1.25E+00    0
Ecliptic   (B1950.0)  288.714797  -34.300083                              1.25E+00  1.25E+00    0
Ecliptic   (J2000.0)  289.415255  -34.306036                              1.25E+00  1.25E+00    0
Galactic              342.031192  -31.209713                              1.25E+00  1.25E+00    0
SuperGalactic         215.494504   17.316849                              1.25E+00  1.25E+00    0
Additional detailed measurements with references are also available by clicking below:
5 Position data point(s)

REDSHIFT-INDEPENDENT DISTANCES for IC 4908 (Back to INDEX)
 N/A 

CLASSIFICATIONS (TYPES, ATTRIBUTES) for IC 4908 (Back to INDEX)
TypeAs PublishedNED HomogenizedFlagReference Code
Galaxy MorphologyS?S?...1991RC3.9.C...0000d
2 Detailed Classification(s)


FOREGROUND GALACTIC EXTINCTION for IC 4908 (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]0.2310.1930.1460.1160.0800.2260.1760.1220.0910.0670.0380.0240.0160.008
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]0.2810.2230.1710.1380.1000.2670.1960.1420.1080.0760.0470.0300.0190.008


Galactic Extinction based on H I Column Densities and Galaxy Counts
(Burstein & Heiles; 1982AJ.....87.1165B) assuming Rv = 3.1:
AB = 0.150 mag
See Notes on Galactic Extinction for important caveats.

BASIC DATA for IC 4908 (Back to INDEX)
Helio. Radial Velocity     :      5350 +/-      100 km/s      
Redshift                   :  0.017846 +/- 0.000334        1983MNRAS.203...47F
Major Diameter (arcmin)    :   0.7
Minor Diameter (arcmin)    :   0.6
Magnitude and Filter       : 14.96
Classifications            : S?                  

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:
5 Redshift data point(s)      27 photometric data point(s)      16 Diameter data point(s)      

QUANTITIES DERIVED FROM REDSHIFT for IC 4908 (Details)(Back to INDEX)
Calculated and Corrected Velocities
V (Heliocentric)           :    5350 +/-    100 km/s      1983MNRAS.203...47F
V (Kinematic LSR)          :    5350 +/-    100 km/s      1986MNRAS.221.1023K
V (Galactocentric GSR)     :    5293 +/-    100 km/s      1991RC3.9.C...0000d
V (Local Group)            :    5265 +/-    100 km/s      1996AJ....111..794K
V (3K CMB)                 :    5251 +/-    100 km/s      1996ApJ...473..576F
V (Virgo Infall only)      :    5222 +/-    100 km/s      2000ApJ...529..786M
V (Virgo + GA only)        :    5657 +/-    105 km/s      2000ApJ...529..786M
V (Virgo + GA + Shapley)   :    5693 +/-    105 km/s      2000ApJ...529..786M

Hubble Flow Distance and Distance Modulus (where Ho =   73.0 +/-   5 km/sec/Mpc)
D (Galactocentric GSR)     :    72.5 +/-    5.3 Mpc      (m-M) = 34.30 +/- 0.15 mag
D (Local Group)            :    72.1 +/-    5.2 Mpc      (m-M) = 34.29 +/- 0.15 mag
D (3K CMB)                 :    71.9 +/-    5.2 Mpc      (m-M) = 34.28 +/- 0.15 mag
D (Virgo Infall only)      :    71.5 +/-    5.2 Mpc      (m-M) = 34.27 +/- 0.15 mag
D (Virgo + GA only)        :    77.5 +/-    5.6 Mpc      (m-M) = 34.45 +/- 0.15 mag
D (Virgo + GA + Shapley)   :    78.0 +/-    5.6 Mpc      (m-M) = 34.46 +/- 0.15 mag

Scale at Hubble Flow Distances
Scale (Galactocentric GSR) :     351 pc/arcsec =  0.351 kpc/arcsec =  21.09 kpc/arcmin =   1.27 Mpc/degree
Scale (Local Group)        :     350 pc/arcsec =  0.350 kpc/arcsec =  20.98 kpc/arcmin =   1.26 Mpc/degree
Scale (3K CMB)             :     349 pc/arcsec =  0.349 kpc/arcsec =  20.92 kpc/arcmin =   1.26 Mpc/degree
Scale (Virgo Infall only)  :     347 pc/arcsec =  0.347 kpc/arcsec =  20.81 kpc/arcmin =   1.25 Mpc/degree
Scale (Virgo + GA only)    :     376 pc/arcsec =  0.376 kpc/arcsec =  22.54 kpc/arcmin =   1.35 Mpc/degree
Scale(Virgo + GA + Shapley):     378 pc/arcsec =  0.378 kpc/arcsec =  22.68 kpc/arcmin =   1.36 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 = 4.408 arcmin and Selected Redshift, defined by the Velocity Range: from to km/sec where V(Heliocentric) = 5350 km/sec
Cosmology-Corrected Quantities [Ho = 73.00 km/sec/Mpc, Ωmatter = 0.27, Ωvacuum = 0.73] [Redshift 0.017515 as corrected to the Reference Frame defined by the 3K Microwave Background Radiation] Luminosity Distance : 72.9 Mpc (m-M) = 34.31 mag Angular-Size Distance : 70.4 Mpc (m-M) = 34.24 mag Co-Moving Radial Distance : 71.7 Mpc (m-M) = 34.28 mag Co-Moving Tangential Dist. : 71.7 Mpc (m-M) = 34.28 mag Co-Moving Volume : 0.00154 Gpc^3 Light Travel-Time : 0.232 Gyr Age at Redshift 0.017515 : 13.067 Gyr Age of Universe : 13.299 Gyr Scale (Cosmology Corrected): 342 pc/arcsec = 0.342 kpc/arcsec = 20.49 kpc/arcmin = 1.23 Mpc/degree Surface Brightness Dimming : Flux Density per Unit Area = 0.93290; Magnitude per Unit Area = 0.07541 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 IC 4908 (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 17.4417 +/- 0.0273924 mag 2012GASC..C...0000S-16.87 +/- 0.50 [mag] 8.18E+08 +/- 1.65E+08
VisualR (Cousins) (R_T) 13.88 +/- 0.09 mag 1989ESOLV.C...0000L-20.43 +/- 0.51 [mag] 6.72E+09 +/- 1.46E+09
Near-InfraredH 11.394 +/- 0.042 mag 20032MASX.C.......:-22.92 +/- 0.50 [mag] 8.56E+09 +/- 1.74E+09
NOTE: The above quantities are derived using a Distance Modulus of 34.31 mag corresponding to
a Luminosity Distance of 72.9 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 27 Photometric data point(s) available in NED.

QUICK-LOOK ANGULAR & PHYSICAL DIAMETERS for IC 4908 (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]
ESO-LV "Quick Blue" IIa-O 63.1055.536 27.0 B-mag arcsec^-2^ 1989ESOLV.C...0000L23.8620.99
K_s (2MASS "total") 56.5046.33165 Diameter for "total" magnitude 20032MASX.C.......:20032MASX.C.......:21.3617.52
NOTE: At z <= 0.5, physical diameters are derived using a Scale at the Hubble Flow Distance (Virgo + GA + Shapley) of 0.378 kpc/arcsec.
The quantities quoted above have not necessarily been corrected for foreground extinction.

View details for 16 Diameter data point(s) available in NED.

EXTERNAL ARCHIVES AND SERVICES for IC 4908 Help (Back to INDEX)
Resources for Object NamesSite/Service
Query SIMBAD by primary NED object name -- IC 4908SIMBAD (CDS, Strasbourg, France)
ESO/Uppsala Survey -- ESO 185- G 030 VizieR Catalog Query (U.S. mirror, CfA/Harvard)
2MASS Extended Source Images (JHKs) -- 2MASX J19565666-5547301 NASA/IPAC Infrared Science Archive (IRSA)
The ESO-LV catalog-- ESO-LV 1850300 VizieR Catalog Query (U.S. mirror, CfA/Harvard)
Query 6dF Galaxy Redshift Survey -- 6dF J1956567-554730 6dF Galaxy Redshift Survey
Catalogue of Principal Galaxies -- PGC 063855 VizieR Catalog Query (U.S. mirror, CfA/Harvard)
Retrieve mean data from LEDA -- PGC 063855 The Lyon/Meudon Extragalactic Database (LEDA)
Query GALEX (NUV/FUV) Mission Archive (7.2 arcsec search radius) -- IC 4908GALEX Mission Data Archive at MAST
Explore IRSA resources with RADAR (10 arcsec search radius) -- IC 4908NASA/IPAC Infrared Science Archive (IRSA)
Resources for position 19h56m56.7s, -55d47m30s (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)
The NRAO Data Archive System





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