NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-04-20 T21:40:47 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. 3

INDEX for NGC 3646
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
177 Reference(s)   
15 Position data point(s)
17 Redshift data point(s)   
12 Diameter data point(s)   
6 Note(s)   
UGC data    
RC3 data    

ESSENTIAL NOTE for NGC 3646 (Back to INDEX)
N/A

CROSS-IDENTIFICATIONS for NGC 3646 (Back to INDEX)
Object Names Type Object Names Type
NGC 3646G KPG 281A G
UGC 06376 G LDCE 0801 NED002 G
CGCG 096-034 G HDCE 0644 NED002 G
CGCG 1119.0+2026 G USGC U382 NED03 G
MCG +03-29-037 G ADBS J112134+2010 RadioS
2MASX J11214310+2010103 IrS HIPASS J1121+20 RadioS
2MASXi J1121431+201014 IrS NSA 159673 G
2MASS J11214308+2010103 IrS PGC 034836 G
SDSS J112143.07+201010.3 G UZC J112143.1+201011 G
SDSS J112143.08+201010.3 G NVSS J112143+201011 RadioS
AKARI J1121433+201010 IrS [M98j] 121 NED01 G
     

COORDINATES for NGC 3646 (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)  169.771165   20.443772 11h19m05.079s +20d26m37.58s  5.00E-01  5.00E-01    0
Equatorial (J2000.0)  170.429504   20.169551 11h21m43.081s +20d10m10.39s  5.00E-01  5.00E-01    0
Ecliptic   (B1950.0)  162.449825   14.728804                              5.00E-01  5.00E-01    0
Ecliptic   (J2000.0)  163.149991   14.730220                              5.00E-01  5.00E-01    0
Galactic              226.852856   68.346469                              5.00E-01  5.00E-01    0
SuperGalactic          89.802137  -15.332643                              5.00E-01  5.00E-01    0
Additional detailed measurements with references are also available by clicking below:
15 Position data point(s)

REDSHIFT-INDEPENDENT DISTANCES for NGC 3646 (Back to INDEX)

15 Distances found in NED View 15 Individual Distance Measurement(s) for NGC 3646

Summary Statistics computed by NED from 15 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 3646 Distance Modulus
(mag)
Metric Distance
(Mpc)
Mean 33.79 57.647
Std. Dev. 0.26 6.271
Min. 33.00 39.800
Max. 34.13 66.900
Median 33.89 59.900

CLASSIFICATIONS (TYPES, ATTRIBUTES) for NGC 3646 (Back to INDEX)
TypeAs PublishedNED HomogenizedFlagReference Code
HierarchyPPPair member (points to parent)...1972AISAO...7....3K
KinematicsHI line widthHI line width...1994A&AS..107..129B
Luminosity Class4.0LC II-III...1991RC3.9.C...0000d
Galaxy MorphologyRINGRING...1991RC3.9.C...0000d
Distance IndicatorTully-FisherTully-Fisher...1997ApJS..109..333W
49 Detailed Classification(s)


FOREGROUND GALACTIC EXTINCTION for NGC 3646 (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]0.1030.0860.0650.0520.0360.1010.0790.0540.0400.0300.0170.0110.0070.004
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]0.1300.1030.0790.0640.0460.1230.0900.0660.0500.0350.0220.0140.0090.004


Galactic Extinction based on H I Column Densities and Galaxy Counts
(Burstein & Heiles; 1982AJ.....87.1165B) assuming Rv = 3.1:
AB = 0.000 mag
See Notes on Galactic Extinction for important caveats.

BASIC DATA for NGC 3646 (Back to INDEX)
Helio. Radial Velocity     :      4248 +/-        5 km/s      
Redshift                   :  0.014170 +/- 0.000017        1991RC3.9.C...0000d
Major Diameter (arcmin)    :   3.9
Minor Diameter (arcmin)    :   2.2
Magnitude and Filter       : 11.1B
Classifications            : SA:(r)bc pec (ring) 

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:
17 Redshift data point(s)      54 photometric data point(s)      12 Diameter data point(s)      

QUANTITIES DERIVED FROM REDSHIFT for NGC 3646 (Details)(Back to INDEX)
Calculated and Corrected Velocities
V (Heliocentric)           :    4248 +/-      5 km/s      1991RC3.9.C...0000d
V (Kinematic LSR)          :    4249 +/-      5 km/s      1986MNRAS.221.1023K
V (Galactocentric GSR)     :    4190 +/-      6 km/s      1991RC3.9.C...0000d
V (Local Group)            :    4147 +/-      8 km/s      1996AJ....111..794K
V (3K CMB)                 :    4578 +/-     24 km/s      1996ApJ...473..576F
V (Virgo Infall only)      :    4395 +/-     19 km/s      2000ApJ...529..786M
V (Virgo + GA only)        :    4732 +/-     30 km/s      2000ApJ...529..786M
V (Virgo + GA + Shapley)   :    4758 +/-     30 km/s      2000ApJ...529..786M

Hubble Flow Distance and Distance Modulus (where Ho =   73.0 +/-   5 km/sec/Mpc)
D (Galactocentric GSR)     :    57.4 +/-    4.0 Mpc      (m-M) = 33.79 +/- 0.15 mag
D (Local Group)            :    56.8 +/-    4.0 Mpc      (m-M) = 33.77 +/- 0.15 mag
D (3K CMB)                 :    62.7 +/-    4.4 Mpc      (m-M) = 33.99 +/- 0.15 mag
D (Virgo Infall only)      :    60.2 +/-    4.2 Mpc      (m-M) = 33.90 +/- 0.15 mag
D (Virgo + GA only)        :    64.8 +/-    4.5 Mpc      (m-M) = 34.06 +/- 0.15 mag
D (Virgo + GA + Shapley)   :    65.2 +/-    4.6 Mpc      (m-M) = 34.07 +/- 0.15 mag

Scale at Hubble Flow Distances
Scale (Galactocentric GSR) :     278 pc/arcsec =  0.278 kpc/arcsec =  16.70 kpc/arcmin =   1.00 Mpc/degree
Scale (Local Group)        :     275 pc/arcsec =  0.275 kpc/arcsec =  16.52 kpc/arcmin =   0.99 Mpc/degree
Scale (3K CMB)             :     304 pc/arcsec =  0.304 kpc/arcsec =  18.24 kpc/arcmin =   1.09 Mpc/degree
Scale (Virgo Infall only)  :     292 pc/arcsec =  0.292 kpc/arcsec =  17.51 kpc/arcmin =   1.05 Mpc/degree
Scale (Virgo + GA only)    :     314 pc/arcsec =  0.314 kpc/arcsec =  18.85 kpc/arcmin =   1.13 Mpc/degree
Scale(Virgo + GA + Shapley):     316 pc/arcsec =  0.316 kpc/arcsec =  18.96 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 = 5.275 arcmin and Selected Redshift, defined by the Velocity Range: from to km/sec where V(Heliocentric) = 4248 km/sec
Cosmology-Corrected Quantities [Ho = 73.00 km/sec/Mpc, Ωmatter = 0.27, Ωvacuum = 0.73] [Redshift 0.015270 as corrected to the Reference Frame defined by the 3K Microwave Background Radiation] Luminosity Distance : 63.5 Mpc (m-M) = 34.01 mag Angular-Size Distance : 61.6 Mpc (m-M) = 33.95 mag Co-Moving Radial Distance : 62.5 Mpc (m-M) = 33.98 mag Co-Moving Tangential Dist. : 62.5 Mpc (m-M) = 33.98 mag Co-Moving Volume : 0.00102 Gpc^3 Light Travel-Time : 0.202 Gyr Age at Redshift 0.015270 : 13.097 Gyr Age of Universe : 13.299 Gyr Scale (Cosmology Corrected): 299 pc/arcsec = 0.299 kpc/arcsec = 17.91 kpc/arcmin = 1.07 Mpc/degree Surface Brightness Dimming : Flux Density per Unit Area = 0.94118; Magnitude per Unit Area = 0.06582 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 3646 (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) 13.64 +/- 0.00 mag 2010AJ....140.1975S-20.15 +/- 0.14 [mag] 1.82E+10 +/- 1.02E+09
VisualI 10.15 mag 2007ApJS..172..599S-23.64 [mag] 8.70E+10
Near-InfraredH 8.844 +/- 0.022 mag 20032MASX.C.......:-24.95 +/- 0.14 [mag] 5.59E+10 +/- 3.34E+09
Radio1.4 GHz (VLA) 69.1 milliJy 2002AJ....124..675C 3.85E+31 [W] 1.00E+05
NOTE: The above quantities are derived using an estimated Distance Modulus of (33.79 +/- 0.26) mag corresponding to
a Metric Distance of (57.647 +/- 6.271) 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 NGC 3646 (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) 233.40133.0450 25.0 B-mag arcsec^-2^ 1991RC3.9.C...0000d65.2337.18
K_s (2MASS "total") 210.00130.2055 Diameter for "total" magnitude 20032MASX.C.......:20032MASX.C.......:58.6936.39
NOTE: Physical diameters are derived using a scale of 0.2795 kpc/arcsec based on Average NED-D Metric Distance of (57.647 +/- 6.271) Mpc.
The quantities quoted above have not necessarily been corrected for foreground extinction.

View details for 12 Diameter data point(s) available in NED.

EXTERNAL ARCHIVES AND SERVICES for NGC 3646 Help (Back to INDEX)
Resources for Object NamesSite/Service
Query SIMBAD by primary NED object name -- NGC 3646SIMBAD (CDS, Strasbourg, France)
Revised New General Catalogue -- NGC 3646VizieR Catalog Query (U.S. mirror, CfA/Harvard)
Uppsala General Catalog -- UGC 06376 VizieR Catalog Query (U.S. mirror, CfA/Harvard)
Original Zwicky Catalog -- CGCG 096-034 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 +03-29-037 VizieR Catalog Query (U.S. mirror, CfA/Harvard)
2MASS Extended Source Images (JHKs) -- 2MASX J11214310+2010103 NASA/IPAC Infrared Science Archive (IRSA)
2MASS Extended Source Images (JHKs) -- 2MASXi J1121431+201014 NASA/IPAC Infrared Science Archive (IRSA)
version
SDSS Sky Server
Catalogue of Principal Galaxies -- PGC 034836 VizieR Catalog Query (U.S. mirror, CfA/Harvard)
Retrieve mean data from LEDA -- PGC 034836 The Lyon/Meudon Extragalactic Database (LEDA)
NRAO/VLA Sky Survey (NVSS)
Query GALEX (NUV/FUV) Mission Archive (7.2 arcsec search radius) -- NGC 3646GALEX Mission Data Archive at MAST
Explore IRSA resources with RADAR (10 arcsec search radius) -- NGC 3646NASA/IPAC Infrared Science Archive (IRSA)
Resources for position 11h21m43.1s, +20d10m10s (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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