NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-06-18 T10:48:21 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 NGC 2957 NED02
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
   
15 Photometric data point(s) and SED   
Spectra   
Redshift-Independent Distances
13 Reference(s)   
4 Position data point(s)
6 Redshift data point(s)   
6 Diameter data point(s)   
2 Note(s)   
1 Association(s)   
RC3 data    

ESSENTIAL NOTE for NGC 2957 NED02 (Back to INDEX)
N/A

CROSS-IDENTIFICATIONS for NGC 2957 NED02 (Back to INDEX)
Object Names Type Object Names Type
NGC 2957 NED02G 2MASX J09471828+7259026 IrS
NGC 2957A G 2MASXi J0947182+725902 IrS
NGC 2957B G 2MASS J09471823+7259024 IrS
CGCG 332-064 NED02 G NPM1G +73.0057 G
CGCG 333-002 NED02 G PGC 028119 G
CGCG 0942.7+7313 NED02 G UZC J094718.5+725901 G
MCG +12-10-002 G [CPS2012a] J094718.0+725903 G
MCG +12-10-002 NED02 G    

COORDINATES for NGC 2957 NED02 (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)  145.675454   73.215508 09h42m42.109s +73d12m55.83s  7.50E-01  7.50E-01    0
Equatorial (J2000.0)  146.824994   72.984081 09h47m17.999s +72d59m02.69s  7.50E-01  7.50E-01    0
Ecliptic   (B1950.0)  114.213461   54.445599                              7.50E-01  7.50E-01    0
Ecliptic   (J2000.0)  114.916339   54.451294                              7.50E-01  7.50E-01    0
Galactic              138.453504   38.085031                              7.50E-01  7.50E-01    0
SuperGalactic          37.994708    3.044310                              7.50E-01  7.50E-01    0
Additional detailed measurements with references are also available by clicking below:
4 Position data point(s)

REDSHIFT-INDEPENDENT DISTANCES for NGC 2957 NED02 (Back to INDEX)
 N/A 

CLASSIFICATIONS (TYPES, ATTRIBUTES) for NGC 2957 NED02 (Back to INDEX)
TypeAs PublishedNED HomogenizedFlagReference Code
HierarchyPCPair member, contact system...1976RC2...C...0000d
Galaxy MorphologyS?S?...1991RC3.9.C...0000d
3 Detailed Classification(s)


FOREGROUND GALACTIC EXTINCTION for NGC 2957 NED02 (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]0.1440.1200.0910.0720.0500.1410.1100.0760.0560.0420.0240.0150.0100.005
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]0.1840.1460.1130.0910.0660.1750.1290.0930.0710.0500.0310.0200.0120.005


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 2957 NED02 (Back to INDEX)
Helio. Radial Velocity     :      6852 +/-       22 km/s      
Redshift                   :  0.022856 +/- 0.000073        1991RC3.9.C...0000d
Major Diameter (arcmin)    :  1.0 
Minor Diameter (arcmin)    :  0.4 
Magnitude and Filter       : 15.51
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)      15 photometric data point(s)      6 Diameter data point(s)      

QUANTITIES DERIVED FROM REDSHIFT for NGC 2957 NED02 (Details)(Back to INDEX)
Calculated and Corrected Velocities
V (Heliocentric)           :    6852 +/-     22 km/s      1991RC3.9.C...0000d
V (Kinematic LSR)          :    6859 +/-     22 km/s      1986MNRAS.221.1023K
V (Galactocentric GSR)     :    6972 +/-     22 km/s      1991RC3.9.C...0000d
V (Local Group)            :    7013 +/-     24 km/s      1996AJ....111..794K
V (3K CMB)                 :    6909 +/-     22 km/s      1996ApJ...473..576F
V (Virgo Infall only)      :    7125 +/-     25 km/s      2000ApJ...529..786M
V (Virgo + GA only)        :    7068 +/-     25 km/s      2000ApJ...529..786M
V (Virgo + GA + Shapley)   :    7083 +/-     26 km/s      2000ApJ...529..786M

Hubble Flow Distance and Distance Modulus (where Ho =   73.0 +/-   5 km/sec/Mpc)
D (Galactocentric GSR)     :    95.5 +/-    6.7 Mpc      (m-M) = 34.90 +/- 0.15 mag
D (Local Group)            :    96.1 +/-    6.7 Mpc      (m-M) = 34.91 +/- 0.15 mag
D (3K CMB)                 :    94.6 +/-    6.6 Mpc      (m-M) = 34.88 +/- 0.15 mag
D (Virgo Infall only)      :    97.6 +/-    6.8 Mpc      (m-M) = 34.95 +/- 0.15 mag
D (Virgo + GA only)        :    96.8 +/-    6.8 Mpc      (m-M) = 34.93 +/- 0.15 mag
D (Virgo + GA + Shapley)   :    97.0 +/-    6.8 Mpc      (m-M) = 34.93 +/- 0.15 mag

Scale at Hubble Flow Distances
Scale (Galactocentric GSR) :     463 pc/arcsec =  0.463 kpc/arcsec =  27.78 kpc/arcmin =   1.67 Mpc/degree
Scale (Local Group)        :     466 pc/arcsec =  0.466 kpc/arcsec =  27.94 kpc/arcmin =   1.68 Mpc/degree
Scale (3K CMB)             :     459 pc/arcsec =  0.459 kpc/arcsec =  27.53 kpc/arcmin =   1.65 Mpc/degree
Scale (Virgo Infall only)  :     473 pc/arcsec =  0.473 kpc/arcsec =  28.39 kpc/arcmin =   1.70 Mpc/degree
Scale (Virgo + GA only)    :     469 pc/arcsec =  0.469 kpc/arcsec =  28.16 kpc/arcmin =   1.69 Mpc/degree
Scale(Virgo + GA + Shapley):     470 pc/arcsec =  0.470 kpc/arcsec =  28.22 kpc/arcmin =   1.69 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 = 3.543 arcmin and Selected Redshift, defined by the Velocity Range: from to km/sec where V(Heliocentric) = 6852 km/sec
Cosmology-Corrected Quantities [Ho = 73.00 km/sec/Mpc, Ωmatter = 0.27, Ωvacuum = 0.73] [Redshift 0.023047 as corrected to the Reference Frame defined by the 3K Microwave Background Radiation] Luminosity Distance : 96.4 Mpc (m-M) = 34.92 mag Angular-Size Distance : 92.1 Mpc (m-M) = 34.82 mag Co-Moving Radial Distance : 94.2 Mpc (m-M) = 34.87 mag Co-Moving Tangential Dist. : 94.2 Mpc (m-M) = 34.87 mag Co-Moving Volume : 0.0035 Gpc^3 Light Travel-Time : 0.304 Gyr Age at Redshift 0.023047 : 12.995 Gyr Age of Universe : 13.299 Gyr Scale (Cosmology Corrected): 446 pc/arcsec = 0.446 kpc/arcsec = 26.79 kpc/arcmin = 1.61 Mpc/degree Surface Brightness Dimming : Flux Density per Unit Area = 0.91289; Magnitude per Unit Area = 0.09896 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 2957 NED02 (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)]
Near-InfraredH 11.106 +/- 0.037 mag 20032MASX.C.......:-23.81 +/- 0.50 [mag] 1.95E+10 +/- 3.95E+09
NOTE: The above quantities are derived using a Distance Modulus of 34.92 mag corresponding to
a Luminosity Distance of 96.4 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 15 Photometric data point(s) available in NED.

QUICK-LOOK ANGULAR & PHYSICAL DIAMETERS for NGC 2957 NED02 (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) 61.4021.49... 25.0 B-mag arcsec^-2^ 1991RC3.9.C...0000d28.8810.11
K_s (2MASS "total") 67.3030.9650 Diameter for "total" magnitude 20032MASX.C.......:20032MASX.C.......:31.6614.56
NOTE: At z <= 0.5, physical diameters are derived using a Scale at the Hubble Flow Distance (Virgo + GA + Shapley) of 0.470 kpc/arcsec.
The quantities quoted above have not necessarily been corrected for foreground extinction.

View details for 6 Diameter data point(s) available in NED.

EXTERNAL ARCHIVES AND SERVICES for NGC 2957 NED02 Help (Back to INDEX)
Resources for Object NamesSite/Service
Revised New General Catalogue -- NGC 2957A VizieR Catalog Query (U.S. mirror, CfA/Harvard)
Revised New General Catalogue -- NGC 2957B VizieR Catalog Query (U.S. mirror, CfA/Harvard)
Morphological Catalog of Galaxies -- MCG +12-10-002 VizieR Catalog Query (U.S. mirror, CfA/Harvard)
2MASS Extended Source Images (JHKs) -- 2MASX J09471828+7259026 NASA/IPAC Infrared Science Archive (IRSA)
2MASS Extended Source Images (JHKs) -- 2MASXi J0947182+725902 NASA/IPAC Infrared Science Archive (IRSA)
Catalogue of Principal Galaxies -- PGC 028119 VizieR Catalog Query (U.S. mirror, CfA/Harvard)
Retrieve mean data from LEDA -- PGC 028119 The Lyon/Meudon Extragalactic Database (LEDA)
Query UZC Spectral Archive (60 arcsec search radius)Updated Zwicky Catalog Data (Harvard/SAO)
Query GALEX (NUV/FUV) Mission Archive (7.2 arcsec search radius) -- NGC 2957 NED02GALEX Mission Data Archive at MAST
Explore IRSA resources with RADAR (10 arcsec search radius) -- NGC 2957 NED02NASA/IPAC Infrared Science Archive (IRSA)
Resources for position 09h47m18.0s, +72d59m03s (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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