NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-06-27 T01:26:22 PDT
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You have selected the following parameters to search on:

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 4639
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
   
54 Photometric data point(s) and SED   
Spectra   
Redshift-Independent Distances
22 Reference(s)   
14 Position data point(s)
10 Redshift data point(s)   
10 Diameter data point(s)   

ESSENTIAL NOTE for IC 4639 (Back to INDEX)
N/A

CROSS-IDENTIFICATIONS for IC 4639 (Back to INDEX)
Object Names Type Object Names Type
IC 4639G NPM1G +22.0562 G
2MASX J17025471+2255479 IrS LEDA 1678509 G
2MASS J17025473+2255480 IrS SDSS-g-fon-1950 G
SDSS J170254.75+225548.0 G SDSS-i-fon-1806 G
SDSS J170254.76+225548.1 G SDSS-r-fon-1932 G
GALEXASC J170254.76+225547.1 UvS [TTL2012] 015246 G
SPIDER J255.72814+22.93002 G SDSS J170254.75+225548.1 G
ASK 406562.0 G [PJY2015] 588018253229785497 G
     

COORDINATES for IC 4639 (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)  255.201583   22.999872 17h00m48.380s +22d59m59.54s  5.00E-01  5.00E-01    0
Equatorial (J2000.0)  255.728142   22.930017 17h02m54.754s +22d55m48.06s  5.00E-01  5.00E-01    0
Ecliptic   (B1950.0)  250.420589   45.444632                              5.00E-01  5.00E-01    0
Ecliptic   (J2000.0)  251.120891   45.438346                              5.00E-01  5.00E-01    0
Galactic               43.656221   33.466370                              5.00E-01  5.00E-01    0
SuperGalactic          96.751028   62.635793                              5.00E-01  5.00E-01    0
Additional detailed measurements with references are also available by clicking below:
14 Position data point(s)

REDSHIFT-INDEPENDENT DISTANCES for IC 4639 (Back to INDEX)

1 Distances found in NED View 1 Individual Distance Measurement(s) for IC 4639

Summary Statistics computed by NED from 1 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.


IC 4639 Distance Modulus
(mag)
Metric Distance
(Mpc)
Mean 36.92 242.000
Std. Dev. N/A N/A
Min. 36.92 242.000
Max. 36.92 242.000
Median 36.92 242.000

CLASSIFICATIONS (TYPES, ATTRIBUTES) for IC 4639 (Back to INDEX)
 N/A 

FOREGROUND GALACTIC EXTINCTION for IC 4639 (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]0.2300.1930.1460.1150.0800.2250.1760.1210.0900.0670.0380.0240.0160.008
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]0.2910.2310.1780.1430.1040.2760.2030.1470.1120.0790.0480.0310.0200.008


Galactic Extinction based on H I Column Densities and Galaxy Counts
(Burstein & Heiles; 1982AJ.....87.1165B) assuming Rv = 3.1:
AB = 0.230 mag
See Notes on Galactic Extinction for important caveats.

BASIC DATA for IC 4639 (Back to INDEX)
Helio. Radial Velocity     :     17203 +/-       52 km/s      
Redshift                   :  0.057383 +/- 0.000174        2006SDSS5.C...0000:
Major Diameter (arcmin)    :  0.63
Minor Diameter (arcmin)    :  0.53
Magnitude and Filter       : 15.5g
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:
10 Redshift data point(s)      54 photometric data point(s)      10 Diameter data point(s)      

QUANTITIES DERIVED FROM REDSHIFT for IC 4639 (Details)(Back to INDEX)
Calculated and Corrected Velocities
V (Heliocentric)           :   17203 +/-     52 km/s      2006SDSS5.C...0000:
V (Kinematic LSR)          :   17222 +/-     52 km/s      1986MNRAS.221.1023K
V (Galactocentric GSR)     :   17346 +/-     52 km/s      1991RC3.9.C...0000d
V (Local Group)            :   17362 +/-     53 km/s      1996AJ....111..794K
V (3K CMB)                 :   17199 +/-     52 km/s      1996ApJ...473..576F
V (Virgo Infall only)      :   17457 +/-     53 km/s      2000ApJ...529..786M
V (Virgo + GA only)        :   17597 +/-     54 km/s      2000ApJ...529..786M
V (Virgo + GA + Shapley)   :   17665 +/-     55 km/s      2000ApJ...529..786M

Hubble Flow Distance and Distance Modulus (where Ho =   73.0 +/-   5 km/sec/Mpc)
D (Galactocentric GSR)     :   237.6 +/-   16.6 Mpc      (m-M) = 36.88 +/- 0.15 mag
D (Local Group)            :   237.8 +/-   16.7 Mpc      (m-M) = 36.88 +/- 0.15 mag
D (3K CMB)                 :   235.6 +/-   16.5 Mpc      (m-M) = 36.86 +/- 0.15 mag
D (Virgo Infall only)      :   239.1 +/-   16.8 Mpc      (m-M) = 36.89 +/- 0.15 mag
D (Virgo + GA only)        :   241.1 +/-   16.9 Mpc      (m-M) = 36.91 +/- 0.15 mag
D (Virgo + GA + Shapley)   :   242.0 +/-   17.0 Mpc      (m-M) = 36.92 +/- 0.15 mag

Scale at Hubble Flow Distances
Scale (Galactocentric GSR) :    1152 pc/arcsec =  1.152 kpc/arcsec =  69.12 kpc/arcmin =   4.15 Mpc/degree
Scale (Local Group)        :    1153 pc/arcsec =  1.153 kpc/arcsec =  69.18 kpc/arcmin =   4.15 Mpc/degree
Scale (3K CMB)             :    1142 pc/arcsec =  1.142 kpc/arcsec =  68.53 kpc/arcmin =   4.11 Mpc/degree
Scale (Virgo Infall only)  :    1159 pc/arcsec =  1.159 kpc/arcsec =  69.56 kpc/arcmin =   4.17 Mpc/degree
Scale (Virgo + GA only)    :    1169 pc/arcsec =  1.169 kpc/arcsec =  70.12 kpc/arcmin =   4.21 Mpc/degree
Scale(Virgo + GA + Shapley):    1173 pc/arcsec =  1.173 kpc/arcsec =  70.39 kpc/arcmin =   4.22 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 = 1.421 arcmin and Selected Redshift, defined by the Velocity Range: from to km/sec where V(Heliocentric) = 17203 km/sec
Cosmology-Corrected Quantities [Ho = 73.00 km/sec/Mpc, Ωmatter = 0.27, Ωvacuum = 0.73] [Redshift 0.057369 as corrected to the Reference Frame defined by the 3K Microwave Background Radiation] Luminosity Distance : 246 Mpc (m-M) = 36.96 mag Angular-Size Distance : 220 Mpc (m-M) = 36.71 mag Co-Moving Radial Distance : 233 Mpc (m-M) = 36.84 mag Co-Moving Tangential Dist. : 233 Mpc (m-M) = 36.84 mag Co-Moving Volume : 0.0529 Gpc^3 Light Travel-Time : 0.738 Gyr Age at Redshift 0.057369 : 12.560 Gyr Age of Universe : 13.299 Gyr Scale (Cosmology Corrected): 1068 pc/arcsec = 1.068 kpc/arcsec = 64.05 kpc/arcmin = 3.84 Mpc/degree Surface Brightness Dimming : Flux Density per Unit Area = 0.80001; Magnitude per Unit Area = 0.2423 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 4639 (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 19.1685 +/- 0.0937825 mag 2012GASC..C...0000S-17.75 +/- 0.09 [mag] 1.84E+09 +/- 1.58E+08
Visualz (SDSS Model) AB 13.691 +/- 0.004 asinh mag 2006SDSS5.C...0000:-23.23 +/- 0.00 [mag] 7.05E+10 +/- 2.60E+08
Near-InfraredH 11.771 +/- 0.044 mag 20032MASX.C.......:-25.15 +/- 0.04 [mag] 6.63E+10 +/- 2.75E+09
NOTE: The above quantities are derived using an estimated Distance Modulus of (36.92 +/- N/A) mag corresponding to
a Metric Distance of (242.000 +/- N/A) 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 54 Photometric data point(s) available in NED.

QUICK-LOOK ANGULAR & PHYSICAL DIAMETERS for IC 4639 (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]
r (SDSS Isophotal) 44.6839.32173 25.0 mag arcsec^-2^ 2006SDSS5.C...0000:52.4246.13
K_s (2MASS "total") 46.0038.64155 Diameter for "total" magnitude 20032MASX.C.......:20032MASX.C.......:53.9745.33
NOTE: Physical diameters are derived using a scale of 1.1732 kpc/arcsec based on Average NED-D Metric Distance of (242.000 +/- N/A) Mpc.
The quantities quoted above have not necessarily been corrected for foreground extinction.

View details for 10 Diameter data point(s) available in NED.

EXTERNAL ARCHIVES AND SERVICES for IC 4639 Help (Back to INDEX)
Resources for Object NamesSite/Service
Query SIMBAD by primary NED object name -- IC 4639SIMBAD (CDS, Strasbourg, France)
2MASS Extended Source Images (JHKs) -- 2MASX J17025471+2255479 NASA/IPAC Infrared Science Archive (IRSA)
version
SDSS Sky Server
Retrieve mean data from LEDA -- PGC 1678509 The Lyon/Meudon Extragalactic Database (LEDA)
Query GALEX (NUV/FUV) Mission Archive (7.2 arcsec search radius) -- IC 4639GALEX Mission Data Archive at MAST
Explore IRSA resources with RADAR (10 arcsec search radius) -- IC 4639NASA/IPAC Infrared Science Archive (IRSA)
Resources for position 17h02m54.7s, +22d55m48s (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)
    Size:     GIF     FITS File  
Faint Images of the Radio Sky at Twenty-Centimeters
The NRAO Data Archive System





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