NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-06-18 T13:41:35 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 6845D
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
   
20 Photometric data point(s) and SED   
Spectra   
Redshift-Independent Distances
14 Reference(s)   
4 Position data point(s)
6 Redshift data point(s)   
4 Diameter data point(s)   
1 Note(s)   
RC3 data    

ESSENTIAL NOTE for NGC 6845D (Back to INDEX)
N/A

CROSS-IDENTIFICATIONS for NGC 6845D (Back to INDEX)
Object Names Type Object Names Type
NGC 6845DG 2MASS J20005370-4705452 IrS
ESO 284-IG 008 NED04 G SGC 1957.3-4715 G
ESO 195722-4712.5 NED04 G PGC 063978 G
AM 1957-471 NED04 G v2MCG 69:[DMP2012] 4 G
2MASX J20005354-4705424 IrS    

COORDINATES for NGC 6845D (Back to INDEX)

Position Reference:1999GSCTy.C......0G

Reference    Frame     Longitude    Latitude        RA           DEC      Uncertainty Ellipse (arcsec)
                       (degrees)   (degrees)                              Semimajor Semiminor  PA(deg)
Equatorial (B1950.0)  299.321846  -47.233498 19h57m17.243s -47d14m00.59s  9.00E-01  9.00E-01    0
Equatorial (J2000.0)  300.223292  -47.095222 20h00m53.590s -47d05m42.80s  9.00E-01  9.00E-01    0
Ecliptic   (B1950.0)  291.708402  -25.973921                              9.00E-01  9.00E-01    0
Ecliptic   (J2000.0)  292.408493  -25.979726                              9.00E-01  9.00E-01    0
Galactic              352.212562  -30.985455                              9.00E-01  9.00E-01    0
SuperGalactic         218.794815   25.476804                              9.00E-01  9.00E-01    0
Additional detailed measurements with references are also available by clicking below:
4 Position data point(s)

REDSHIFT-INDEPENDENT DISTANCES for NGC 6845D (Back to INDEX)
 N/A 

CLASSIFICATIONS (TYPES, ATTRIBUTES) for NGC 6845D (Back to INDEX)
TypeAs PublishedNED HomogenizedFlagReference Code
HierarchyGMGroup member...1976RC2...C...0000d
Galaxy MorphologyS0: pec edge-onS0? pec edge-on...1991RC3.9.C...0000d
2 Detailed Classification(s)


FOREGROUND GALACTIC EXTINCTION for NGC 6845D (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]0.1980.1660.1250.0990.0690.1940.1510.1040.0780.0580.0320.0210.0140.007
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]0.2500.1990.1530.1230.0890.2380.1750.1270.0960.0680.0420.0270.0170.007


Galactic Extinction based on H I Column Densities and Galaxy Counts
(Burstein & Heiles; 1982AJ.....87.1165B) assuming Rv = 3.1:
AB = 0.160 mag
See Notes on Galactic Extinction for important caveats.

BASIC DATA for NGC 6845D (Back to INDEX)
Helio. Radial Velocity     :      6816 +/-       44 km/s      
Redshift                   :  0.022736 +/- 0.000147        2003MNRAS.342..939G
Major Diameter (arcmin)    :   0.8
Minor Diameter (arcmin)    :   0.5
Magnitude and Filter       : 15.5 
Classifications            : S pec sp            

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)      20 photometric data point(s)      4 Diameter data point(s)      

QUANTITIES DERIVED FROM REDSHIFT for NGC 6845D (Details)(Back to INDEX)
Calculated and Corrected Velocities
V (Heliocentric)           :    6816 +/-     44 km/s      2003MNRAS.342..939G
V (Kinematic LSR)          :    6819 +/-     44 km/s      1986MNRAS.221.1023K
V (Galactocentric GSR)     :    6793 +/-     44 km/s      1991RC3.9.C...0000d
V (Local Group)            :    6777 +/-     44 km/s      1996AJ....111..794K
V (3K CMB)                 :    6681 +/-     45 km/s      1996ApJ...473..576F
V (Virgo Infall only)      :    6721 +/-     44 km/s      2000ApJ...529..786M
V (Virgo + GA only)        :    7110 +/-     52 km/s      2000ApJ...529..786M
V (Virgo + GA + Shapley)   :    7156 +/-     52 km/s      2000ApJ...529..786M

Hubble Flow Distance and Distance Modulus (where Ho =   73.0 +/-   5 km/sec/Mpc)
D (Galactocentric GSR)     :    93.1 +/-    6.5 Mpc      (m-M) = 34.84 +/- 0.15 mag
D (Local Group)            :    92.8 +/-    6.5 Mpc      (m-M) = 34.84 +/- 0.15 mag
D (3K CMB)                 :    91.5 +/-    6.4 Mpc      (m-M) = 34.81 +/- 0.15 mag
D (Virgo Infall only)      :    92.1 +/-    6.5 Mpc      (m-M) = 34.82 +/- 0.15 mag
D (Virgo + GA only)        :    97.4 +/-    6.9 Mpc      (m-M) = 34.94 +/- 0.15 mag
D (Virgo + GA + Shapley)   :    98.0 +/-    6.9 Mpc      (m-M) = 34.96 +/- 0.15 mag

Scale at Hubble Flow Distances
Scale (Galactocentric GSR) :     451 pc/arcsec =  0.451 kpc/arcsec =  27.07 kpc/arcmin =   1.62 Mpc/degree
Scale (Local Group)        :     450 pc/arcsec =  0.450 kpc/arcsec =  27.00 kpc/arcmin =   1.62 Mpc/degree
Scale (3K CMB)             :     444 pc/arcsec =  0.444 kpc/arcsec =  26.62 kpc/arcmin =   1.60 Mpc/degree
Scale (Virgo Infall only)  :     446 pc/arcsec =  0.446 kpc/arcsec =  26.78 kpc/arcmin =   1.61 Mpc/degree
Scale (Virgo + GA only)    :     472 pc/arcsec =  0.472 kpc/arcsec =  28.33 kpc/arcmin =   1.70 Mpc/degree
Scale(Virgo + GA + Shapley):     475 pc/arcsec =  0.475 kpc/arcsec =  28.51 kpc/arcmin =   1.71 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 = 3.507 arcmin and Selected Redshift, defined by the Velocity Range: from to km/sec where V(Heliocentric) = 6816 km/sec
Cosmology-Corrected Quantities [Ho = 73.00 km/sec/Mpc, Ωmatter = 0.27, Ωvacuum = 0.73] [Redshift 0.022284 as corrected to the Reference Frame defined by the 3K Microwave Background Radiation] Luminosity Distance : 93.1 Mpc (m-M) = 34.85 mag Angular-Size Distance : 89.1 Mpc (m-M) = 34.75 mag Co-Moving Radial Distance : 91.1 Mpc (m-M) = 34.80 mag Co-Moving Tangential Dist. : 91.1 Mpc (m-M) = 34.80 mag Co-Moving Volume : 0.00317 Gpc^3 Light Travel-Time : 0.294 Gyr Age at Redshift 0.022284 : 13.005 Gyr Age of Universe : 13.299 Gyr Scale (Cosmology Corrected): 432 pc/arcsec = 0.432 kpc/arcsec = 25.92 kpc/arcmin = 1.56 Mpc/degree Surface Brightness Dimming : Flux Density per Unit Area = 0.91562; Magnitude per Unit Area = 0.09572 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 6845D (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)]
VisualV (V_T^0) 13.93 mag 1991RC3.9.C...0000d-20.92 [mag] 1.43E+10
Near-InfraredH 12.289 +/- 0.062 mag 20032MASX.C.......:-22.56 +/- 0.50 [mag] 6.09E+09 +/- 1.27E+09
NOTE: The above quantities are derived using a Distance Modulus of 34.85 mag corresponding to
a Luminosity Distance of 93.1 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 20 Photometric data point(s) available in NED.

QUICK-LOOK ANGULAR & PHYSICAL DIAMETERS for NGC 6845D (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) 48.8027.82... 25.0 B-mag arcsec^-2^ 1991RC3.9.C...0000d23.1913.22
K_s (2MASS "total") 52.4019.91155 Diameter for "total" magnitude 20032MASX.C.......:20032MASX.C.......:24.909.46
NOTE: At z <= 0.5, physical diameters are derived using a Scale at the Hubble Flow Distance (Virgo + GA + Shapley) of 0.475 kpc/arcsec.
The quantities quoted above have not necessarily been corrected for foreground extinction.

View details for 4 Diameter data point(s) available in NED.

EXTERNAL ARCHIVES AND SERVICES for NGC 6845D Help (Back to INDEX)
Resources for Object NamesSite/Service
Query SIMBAD by primary NED object name -- NGC 6845DSIMBAD (CDS, Strasbourg, France)
Revised New General Catalogue -- NGC 6845DVizieR Catalog Query (U.S. mirror, CfA/Harvard)
2MASS Extended Source Images (JHKs) -- 2MASX J20005354-4705424 NASA/IPAC Infrared Science Archive (IRSA)
Catalogue of Principal Galaxies -- PGC 063978 VizieR Catalog Query (U.S. mirror, CfA/Harvard)
Retrieve mean data from LEDA -- PGC 063978 The Lyon/Meudon Extragalactic Database (LEDA)
Query GALEX (NUV/FUV) Mission Archive (7.2 arcsec search radius) -- NGC 6845DGALEX Mission Data Archive at MAST
Explore IRSA resources with RADAR (10 arcsec search radius) -- NGC 6845DNASA/IPAC Infrared Science Archive (IRSA)
Resources for position 20h00m53.6s, -47d05m43s (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)
The NRAO Data Archive System





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