NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2018-11-17 T15:48:06 PST
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You have selected the following parameters to search on:

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

NED results for object VirgoHI 21


1 objects found in NED.    

SOURCE LIST

 Row          Object Name                 EquJ2000.0       Object  Velocity/Redshift    Mag./  Separ.               Number of                                 Row 
 No.     (* => Essential Note)       RA               DEC  Type     km/s       z   Qual Filter arcmin Refs Notes Phot Posn Vel/z Diam Assoc Images   Spectra  No. 
1    VirgoHI 21                     12h17m53.6s +14d45m25s G        1966  0.006558       ...     ...     9     1    1    0     0    0     0 Retrieve Retrieve 1   

Detailed information for each object


Object No. 1 - VirgoHI 21

INDEX for VirgoHI 21
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
   Classifications
   Foreground Galactic Extinction    
   External Services
Detailed Data (NED queries):

Images
   
1 Photometric data point(s) and SED   
Spectra   
Redshift-Independent Distances
9 Reference(s)   
1 Note(s)   

ESSENTIAL NOTE for VirgoHI 21 (Back to INDEX)
N/A

CROSS-IDENTIFICATIONS for VirgoHI 21 (Back to INDEX)
Object Names Type Object Names Type
VirgoHI 21RadioSVirgoHI 21 ID G

COORDINATES for VirgoHI 21 (Back to INDEX)

Position Reference:2005ApJ...622L..21M

Reference    Frame     Longitude    Latitude        RA           DEC      Uncertainty Ellipse (arcsec)
                       (degrees)   (degrees)                              Semimajor Semiminor  PA(deg)
Equatorial (B1950.0)    183.8380     15.0346     12h15m21s     +15d02.1m  1.50E+02  1.50E+02    0
Equatorial (J2000.0)    184.4733     14.7569     12h17m53s     +14d45.4m  1.50E+02  1.50E+02    0
Ecliptic   (B1950.0)    177.3913     15.2901                              1.50E+02  1.50E+02    0
Ecliptic   (J2000.0)    178.0916     15.2898                              1.50E+02  1.50E+02    0
Galactic                268.9880     75.3701                              1.50E+02  1.50E+02    0
SuperGalactic            99.6893     -4.6554                              1.50E+02  1.50E+02    0

REDSHIFT-INDEPENDENT DISTANCES for VirgoHI 21 (Back to INDEX)
 N/A 

CLASSIFICATIONS (TYPES, ATTRIBUTES) for VirgoHI 21 (Back to INDEX)
 N/A 

FOREGROUND GALACTIC EXTINCTION for VirgoHI 21 (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]0.1450.1210.0920.0720.0500.1420.1100.0760.0570.0420.0240.0150.0100.005
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]0.1830.1450.1120.0900.0650.1730.1280.0930.0700.0500.0300.0190.0120.005


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 VirgoHI 21 (Back to INDEX)
Helio. Radial Velocity     :      1966 km/s       
Redshift                   :  0.006558            2004MNRAS.349..922D
Major Diameter (arcmin)    :      
Minor Diameter (arcmin)    :      
Magnitude and Filter       :      
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:
1 photometric data point(s)      

QUANTITIES DERIVED FROM REDSHIFT(Details)
Calculated and Corrected Velocities
V (Heliocentric)           :    1966  km/s                2004MNRAS.349..922D
V (Kinematic LSR)          :    1970  km/s                1986MNRAS.221.1023K
V (Galactocentric GSR)     :    1914 +/-      2 km/s      1991RC3.9.C...0000d
V (Local Group)            :    1865 +/-      6 km/s      1996AJ....111..794K
V (3K CMB)                 :    2296 +/-     23 km/s      1996ApJ...473..576F
V (Virgo Infall only)      :     957 +/-     64 km/s      2000ApJ...529..786M
V (Virgo + GA only)        :    1023 +/-     64 km/s      2000ApJ...529..786M
V (Virgo + GA + Shapley)   :    1025 +/-     64 km/s      2000ApJ...529..786M
Note:Object in Virgo Cluster (Radius = 10 deg; Velocity Range = 600-2300 km/sec)
 Virgo Cluster mean velocity (957 km/sec) assigned.  See Local Velocity Field Model details

Hubble Flow Distance and Distance Modulus (where Ho =   73.0 +/- 5 km/sec/Mpc)
D (Galactocentric GSR)     :    26.2 +/-    1.8 Mpc      (m-M) = 32.09 +/- 0.15 mag
D (Local Group)            :    25.6 +/-    1.8 Mpc      (m-M) = 32.04 +/- 0.15 mag
D (3K CMB)                 :    31.5 +/-    2.2 Mpc      (m-M) = 32.49 +/- 0.15 mag
D (Virgo Infall only)      :    13.1 +/-    1.3 Mpc      (m-M) = 30.59 +/- 0.20 mag
D (Virgo + GA only)        :    14.0 +/-    1.0 Mpc      (m-M) = 30.73 +/- 0.15 mag
D (Virgo + GA + Shapley)   :    14.0 +/-    1.0 Mpc      (m-M) = 30.74 +/- 0.15 mag

Scale at Hubble Flow Distances
Scale (Galactocentric GSR) :     127 pc/arcsec =  0.127 kpc/arcsec =   7.63 kpc/arcmin =   0.46 Mpc/degree
Scale (Local Group)        :     124 pc/arcsec =  0.124 kpc/arcsec =   7.43 kpc/arcmin =   0.45 Mpc/degree
Scale (3K CMB)             :     152 pc/arcsec =  0.152 kpc/arcsec =   9.15 kpc/arcmin =   0.55 Mpc/degree
Scale (Virgo Infall only)  :      64 pc/arcsec =  0.064 kpc/arcsec =   3.81 kpc/arcmin =   0.23 Mpc/degree
Scale (Virgo + GA only)    :      68 pc/arcsec =  0.068 kpc/arcsec =   4.08 kpc/arcmin =   0.24 Mpc/degree
Scale(Virgo + GA + Shapley):      68 pc/arcsec =  0.068 kpc/arcsec =   4.08 kpc/arcmin =   0.24 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 = 24.494 arcmin and Selected Redshift, defined by the Velocity Range: from to km/sec where V(Heliocentric) = 1966 km/sec
Cosmology-Corrected Quantities [Ho = 73.00 km/sec/Mpc, Ωmatter = 0.27, Ωvacuum = 0.73] [Redshift 0.007659 as corrected to the Reference Frame defined by the 3K Microwave Background Radiation] Luminosity Distance : 31.6 Mpc (m-M) = 32.50 mag Angular-Size Distance : 31.2 Mpc (m-M) = 32.47 mag Co-Moving Radial Distance : 31.4 Mpc (m-M) = 32.48 mag Co-Moving Tangential Dist. : 31.4 Mpc (m-M) = 32.48 mag Co-Moving Volume : 0.00013 Gpc^3 Light Travel-Time : 0.102 Gyr Age at Redshift 0.007659 : 13.197 Gyr Age of Universe : 13.299 Gyr Scale (Cosmology Corrected): 151 pc/arcsec = 0.151 kpc/arcsec = 9.07 kpc/arcmin = 0.54 Mpc/degree Surface Brightness Dimming : Flux Density per Unit Area = 0.96994; Magnitude per Unit Area = 0.03314 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 VirgoHI 21 (Back to INDEX)
 N/A 

EXTERNAL ARCHIVES AND SERVICES for VirgoHI 21 Help (Back to INDEX)
Resources for Object NamesSite/Service
Query SIMBAD by primary NED object name -- VirgoHI 21SIMBAD (CDS, Strasbourg, France)
Query GALEX (NUV/FUV) Mission Archive (7.2 arcsec search radius) -- VirgoHI 21GALEX Mission Data Archive at MAST
Explore IRSA resources with RADAR (10 arcsec search radius) -- VirgoHI 21NASA/IPAC Infrared Science Archive (IRSA)
Resources for position 12h17m53.6s, +14d45m25s (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)
Explore resources with DataScope (15 arcmin 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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