NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-02-18 T07:31:17 PST
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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 7121
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
   
33 Photometric data point(s) and SED   
Spectra   
Redshift-Independent Distances
27 Reference(s)   
8 Position data point(s)
3 Redshift data point(s)   
6 Diameter data point(s)   
RC3 data    

ESSENTIAL NOTE for NGC 7121 (Back to INDEX)
N/A

CROSS-IDENTIFICATIONS for NGC 7121 (Back to INDEX)
Object Names Type Object Names Type
NGC 7121G IRAS F21422-0351 IrS
MCG -01-55-008 G AKARI J2144525-033714 IrS
2MASX J21445258-0337109 IrS 6dF J2144525-033711 G
2MASXi J2144525-033710 IrS 6dF J2144526-033711 G
2MASS J21445260-0337113 IrS GSC 5213 00768 G
GALEXASC J214452.59-033712.1 UvS NSA 149320 G
GALEXMSC J214452.54-033711.4 UvS PGC 067287 G
IRAS 21422-0351 IrS NVSS J214452-033712 RadioS
     

COORDINATES for NGC 7121 (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)  325.568154   -3.850243  21h42m16.36s  -03d51m00.9s  1.25E+00  1.25E+00    0
Equatorial (J2000.0)  326.219083   -3.619722  21h44m52.58s  -03d37m11.0s  1.25E+00  1.25E+00    0
Ecliptic   (B1950.0)  326.519462    9.372915                              1.25E+00  1.25E+00    0
Ecliptic   (J2000.0)  327.217126    9.369804                              1.25E+00  1.25E+00    0
Galactic               52.382917  -39.688394                              1.25E+00  1.25E+00    0
SuperGalactic         275.341958   43.759073                              1.25E+00  1.25E+00    0
Additional detailed measurements with references are also available by clicking below:
8 Position data point(s)

REDSHIFT-INDEPENDENT DISTANCES for NGC 7121 (Back to INDEX)

2 Distances found in NED View 2 Individual Distance Measurement(s) for NGC 7121

Summary Statistics computed by NED from 2 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 7121 Distance Modulus
(mag)
Metric Distance
(Mpc)
Mean 35.42 121.500
Std. Dev. 0.08 4.950
Min. 35.36 118.000
Max. 35.48 125.000
Median 35.42 121.500

CLASSIFICATIONS (TYPES, ATTRIBUTES) for NGC 7121 (Back to INDEX)
TypeAs PublishedNED HomogenizedFlagReference Code
KinematicsHI line widthHI line width...2005A&A...430..373T
Luminosity Class4.0LC II-III...1991RC3.9.C...0000d
Galaxy MorphologySB(r)bc?SB(r)bc?...1991RC3.9.C...0000d
Distance IndicatorTully-FisherTully-Fisher...2007A&A...465...71T
6 Detailed Classification(s)


FOREGROUND GALACTIC EXTINCTION for NGC 7121 (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]0.1170.0980.0740.0590.0410.1150.0890.0620.0460.0340.0190.0120.0080.004
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]0.1470.1170.0900.0720.0530.1400.1030.0750.0570.0400.0240.0160.0100.004


Galactic Extinction based on H I Column Densities and Galaxy Counts
(Burstein & Heiles; 1982AJ.....87.1165B) assuming Rv = 3.1:
AB = 0.070 mag
See Notes on Galactic Extinction for important caveats.

BASIC DATA for NGC 7121 (Back to INDEX)
Helio. Radial Velocity     :      8227 +/-        9 km/s      
Redshift                   :  0.027442 +/- 0.000030        2005A&A...430..373T
Major Diameter (arcmin)    :   1.1
Minor Diameter (arcmin)    :   0.5
Magnitude and Filter       : 14.28
Classifications            : SB(r)bc?       HII  

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:
3 Redshift data point(s)      33 photometric data point(s)      6 Diameter data point(s)      

QUANTITIES DERIVED FROM REDSHIFT for NGC 7121 (Details)(Back to INDEX)
Calculated and Corrected Velocities
V (Heliocentric)           :    8227 +/-      9 km/s      2005A&A...430..373T
V (Kinematic LSR)          :    8236 +/-      9 km/s      1986MNRAS.221.1023K
V (Galactocentric GSR)     :    8368 +/-     11 km/s      1991RC3.9.C...0000d
V (Local Group)            :    8425 +/-     15 km/s      1996AJ....111..794K
V (3K CMB)                 :    7889 +/-     25 km/s      1996ApJ...473..576F
V (Virgo Infall only)      :    8297 +/-     17 km/s      2000ApJ...529..786M
V (Virgo + GA only)        :    8300 +/-     17 km/s      2000ApJ...529..786M
V (Virgo + GA + Shapley)   :    8310 +/-     17 km/s      2000ApJ...529..786M

Hubble Flow Distance and Distance Modulus (where Ho =   73.0 +/-   5 km/sec/Mpc)
D (Galactocentric GSR)     :   114.6 +/-    8.0 Mpc      (m-M) = 35.30 +/- 0.15 mag
D (Local Group)            :   115.4 +/-    8.1 Mpc      (m-M) = 35.31 +/- 0.15 mag
D (3K CMB)                 :   108.1 +/-    7.6 Mpc      (m-M) = 35.17 +/- 0.15 mag
D (Virgo Infall only)      :   113.7 +/-    8.0 Mpc      (m-M) = 35.28 +/- 0.15 mag
D (Virgo + GA only)        :   113.7 +/-    8.0 Mpc      (m-M) = 35.28 +/- 0.15 mag
D (Virgo + GA + Shapley)   :   113.8 +/-    8.0 Mpc      (m-M) = 35.28 +/- 0.15 mag

Scale at Hubble Flow Distances
Scale (Galactocentric GSR) :     556 pc/arcsec =  0.556 kpc/arcsec =  33.35 kpc/arcmin =   2.00 Mpc/degree
Scale (Local Group)        :     560 pc/arcsec =  0.560 kpc/arcsec =  33.57 kpc/arcmin =   2.01 Mpc/degree
Scale (3K CMB)             :     524 pc/arcsec =  0.524 kpc/arcsec =  31.43 kpc/arcmin =   1.89 Mpc/degree
Scale (Virgo Infall only)  :     551 pc/arcsec =  0.551 kpc/arcsec =  33.06 kpc/arcmin =   1.98 Mpc/degree
Scale (Virgo + GA only)    :     551 pc/arcsec =  0.551 kpc/arcsec =  33.07 kpc/arcmin =   1.98 Mpc/degree
Scale(Virgo + GA + Shapley):     552 pc/arcsec =  0.552 kpc/arcsec =  33.11 kpc/arcmin =   1.99 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 = 3.020 arcmin and Selected Redshift, defined by the Velocity Range: from to km/sec where V(Heliocentric) = 8227 km/sec
Cosmology-Corrected Quantities [Ho = 73.00 km/sec/Mpc, Ωmatter = 0.27, Ωvacuum = 0.73] [Redshift 0.026313 as corrected to the Reference Frame defined by the 3K Microwave Background Radiation] Luminosity Distance : 110 Mpc (m-M) = 35.21 mag Angular-Size Distance : 105 Mpc (m-M) = 35.10 mag Co-Moving Radial Distance : 107 Mpc (m-M) = 35.16 mag Co-Moving Tangential Dist. : 107 Mpc (m-M) = 35.16 mag Co-Moving Volume : 0.0052 Gpc^3 Light Travel-Time : 0.346 Gyr Age at Redshift 0.026313 : 12.953 Gyr Age of Universe : 13.299 Gyr Scale (Cosmology Corrected): 508 pc/arcsec = 0.508 kpc/arcsec = 30.46 kpc/arcmin = 1.83 Mpc/degree Surface Brightness Dimming : Flux Density per Unit Area = 0.90132; Magnitude per Unit Area = 0.1128 mag