NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2018-12-13 T21:12:30 PST
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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. 1

INDEX for NGC 6987
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
   
42 Photometric data point(s) and SED   
Spectra   
Redshift-Independent Distances
50 Reference(s)   
9 Position data point(s)
4 Redshift data point(s)   
17 Diameter data point(s)   
4 Note(s)   
1 Association(s)   
ESO data    
RC3 data    

ESSENTIAL NOTE for NGC 6987 (Back to INDEX)
N/A

CROSS-IDENTIFICATIONS for NGC 6987 (Back to INDEX)
Object Names Type Object Names Type
NGC 6987G 6dF J2058104-483749 G
ESO 235- G 021 G 6dFGSv 10001 G
ESO 205442-4849.4 G LDCE 1438 NED003 G
2MASX J20581033-4837491 IrS APMBGC 235+046-070 G
2MASS J20581035-4837490 IrS APMUKS(BJ) B205441.55-484925.4G
GALEXASC J205810.44-483747.0 UvS MRSS 235-145568 G
IRAS 20546-4849 IrS PGC 065807 G
IRAS F20547-4849 IrS SUMSS J205810-483750 RadioS
SGC 205442-4849.4 G SPT-S J205810-4837.8 RadioS
ESO-LV 2350210 G LGG 441:[G93] 002 G
6dF J2058103-483749 G [RFG96] 205442.0-484924 G
     

COORDINATES for NGC 6987 (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)  313.674622  -48.824130  20h54m41.91s  -48d49m26.9s  1.25E+00  1.25E+00    0
Equatorial (J2000.0)  314.543167  -48.630306  20h58m10.36s  -48d37m49.1s  1.25E+00  1.25E+00    0
Ecliptic   (B1950.0)  301.692567  -30.071700                              1.25E+00  1.25E+00    0
Ecliptic   (J2000.0)  302.393479  -30.076896                              1.25E+00  1.25E+00    0
Galactic              350.751445  -40.627625                              1.25E+00  1.25E+00    0
SuperGalactic         227.563281   20.082330                              1.25E+00  1.25E+00    0
Additional detailed measurements with references are also available by clicking below:
9 Position data point(s)

REDSHIFT-INDEPENDENT DISTANCES for NGC 6987 (Back to INDEX)

7 Distances found in NED View 7 Individual Distance Measurement(s) for NGC 6987

Summary Statistics computed by NED from 7 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 6987 Distance Modulus
(mag)
Metric Distance
(Mpc)
Mean 34.62 86.129
Std. Dev. 0.50 20.517
Min. 34.01 63.500
Max. 35.33 116.000
Median 34.53 80.700

CLASSIFICATIONS (TYPES, ATTRIBUTES) for NGC 6987 (Back to INDEX)
TypeAs PublishedNED HomogenizedFlagReference Code
HierarchyGRGroup member, radial-velocity confirmed...1993A&AS..100...47G
Galaxy MorphologyE0:E0?...1991RC3.9.C...0000d
Distance IndicatorTully-FisherTully-Fisher...2007A&A...465...71T
8 Detailed Classification(s)


FOREGROUND GALACTIC EXTINCTION for NGC 6987 (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]0.1700.1430.1080.0850.0590.1670.1300.0900.0670.0500.0280.0180.0120.006
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]0.2100.1670.1280.1030.0750.1990.1470.1060.0810.0570.0350.0220.0140.006


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 6987 (Back to INDEX)
Helio. Radial Velocity     :      5239 +/-       27 km/s      
Redshift                   :  0.017475 +/- 0.000090        1996A&A...312..745R
Major Diameter (arcmin)    :   1.4
Minor Diameter (arcmin)    :   1.2
Magnitude and Filter       : 13.44
Classifications            : E0:                 

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:
4 Redshift data point(s)      42 photometric data point(s)      17 Diameter data point(s)      

QUANTITIES DERIVED FROM REDSHIFT for NGC 6987 (Details)(Back to INDEX)
Calculated and Corrected Velocities
V (Heliocentric)           :    5239 +/-     27 km/s      1996A&A...312..745R
V (Kinematic LSR)          :    5240 +/-     27 km/s      1986MNRAS.221.1023K
V (Galactocentric GSR)     :    5213 +/-     27 km/s      1991RC3.9.C...0000d
V (Local Group)            :    5202 +/-     27 km/s      1996AJ....111..794K
V (3K CMB)                 :    5070 +/-     29 km/s      1996ApJ...473..576F
V (Virgo Infall only)      :    5126 +/-     28 km/s      2000ApJ...529..786M
V (Virgo + GA only)        :    5469 +/-     37 km/s      2000ApJ...529..786M
V (Virgo + GA + Shapley)   :    5503 +/-     37 km/s      2000ApJ...529..786M

Hubble Flow Distance and Distance Modulus (where Ho =   73.0 +/-   5 km/sec/Mpc)
D (Galactocentric GSR)     :    71.4 +/-    5.0 Mpc      (m-M) = 34.27 +/- 0.15 mag
D (Local Group)            :    71.3 +/-    5.0 Mpc      (m-M) = 34.26 +/- 0.15 mag
D (3K CMB)                 :    69.4 +/-    4.9 Mpc      (m-M) = 34.21 +/- 0.15 mag
D (Virgo Infall only)      :    70.2 +/-    4.9 Mpc      (m-M) = 34.23 +/- 0.15 mag
D (Virgo + GA only)        :    74.9 +/-    5.3 Mpc      (m-M) = 34.37 +/- 0.15 mag
D (Virgo + GA + Shapley)   :    75.4 +/-    5.3 Mpc      (m-M) = 34.39 +/- 0.15 mag

Scale at Hubble Flow Distances
Scale (Galactocentric GSR) :     346 pc/arcsec =  0.346 kpc/arcsec =  20.77 kpc/arcmin =   1.25 Mpc/degree
Scale (Local Group)        :     346 pc/arcsec =  0.346 kpc/arcsec =  20.73 kpc/arcmin =   1.24 Mpc/degree
Scale (3K CMB)             :     337 pc/arcsec =  0.337 kpc/arcsec =  20.20 kpc/arcmin =   1.21 Mpc/degree
Scale (Virgo Infall only)  :     340 pc/arcsec =  0.340 kpc/arcsec =  20.42 kpc/arcmin =   1.23 Mpc/degree
Scale (Virgo + GA only)    :     363 pc/arcsec =  0.363 kpc/arcsec =  21.79 kpc/arcmin =   1.31 Mpc/degree
Scale(Virgo + GA + Shapley):     365 pc/arcsec =  0.365 kpc/arcsec =  21.93 kpc/arcmin =   1.32 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 = 4.560 arcmin and Selected Redshift, defined by the Velocity Range: from to km/sec where V(Heliocentric) = 5239 km/sec
Cosmology-Corrected Quantities [Ho = 73.00 km/sec/Mpc, Ωmatter = 0.27, Ωvacuum = 0.73] [Redshift 0.016911 as corrected to the Reference Frame defined by the 3K Microwave Background Radiation] Luminosity Distance : 70.4 Mpc (m-M) = 34.24 mag Angular-Size Distance : 68.1 Mpc (m-M) = 34.16 mag Co-Moving Radial Distance : 69.2 Mpc (m-M) = 34.20 mag Co-Moving Tangential Dist. : 69.2 Mpc (m-M) = 34.20 mag Co-Moving Volume : 0.00139 Gpc^3 Light Travel-Time : 0.224 Gyr Age at Redshift 0.016911 : 13.075 Gyr Age of Universe : 13.299 Gyr Scale (Cosmology Corrected): 330 pc/arcsec = 0.330 kpc/arcsec = 19.80 kpc/arcmin = 1.19 Mpc/degree Surface Brightness Dimming : Flux Density per Unit Area = 0.93512; Magnitude per Unit Area = 0.07283 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 6987 (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) AB 17.7080 +/- 0.0331068 mag 2012GASC..C...0000S-16.91 +/- 0.45 [mag] 8.93E+08 +/- 1.63E+08
VisualI (VLT) 10.29 mag 2011A&A...534A..35C-24.33 [mag] 1.64E+11
Near-InfraredH 9.594 +/- 0.023 mag 20032MASX.C.......:-25.03 +/- 0.45 [mag] 6.26E+10 +/- 1.14E+10
Mid-Infrared25 microns (IRAS) 0.080 +/- 0.027 Jy 1994PrivC.U..J....K 8.52E+35 +/- 3.26E+35 [W] 2.22E+09 +/- 8.48E+08
Far-Infrared100 microns (IRAS) 2.190 +/- 0.118 Jy 1994PrivC.U..J....K 5.83E+36 +/- 1.10E+36 [W] 1.52E+10 +/- 2.85E+09
Radio843 MHz (SUMSS) 77.5 +/- 2.7 milliJy 2008SUMSS.2.1.....: 5.80E+31 +/- 1.06E+31 [W] 1.51E+05 +/- 2.77E+04
NOTE: The above quantities are derived using an estimated Distance Modulus of (34.62 +/- 0.50) mag corresponding to
a Metric Distance of (86.129 +/- 20.517) 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 42 Photometric data point(s) available in NED.

QUICK-LOOK ANGULAR & PHYSICAL DIAMETERS for NGC 6987 (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]
ESO-LV "Quick Blue" IIa-O 169.82137.55122 27.0 B-mag arcsec^-2^ 1989ESOLV.C...0000L70.9157.44
K_s (2MASS "total") 99.4087.47155 Diameter for "total" magnitude 20032MASX.C.......:20032MASX.C.......:41.5136.53
NOTE: Physical diameters are derived using a scale of 0.4176 kpc/arcsec based on Average NED-D Metric Distance of (86.129 +/- 20.517) Mpc.
The quantities quoted above have not necessarily been corrected for foreground extinction.

View details for 17 Diameter data point(s) available in NED.

EXTERNAL ARCHIVES AND SERVICES for NGC 6987 Help (Back to INDEX)
Resources for Object NamesSite/Service
Query SIMBAD by primary NED object name -- NGC 6987SIMBAD (CDS, Strasbourg, France)
Revised New General Catalogue -- NGC 6987VizieR Catalog Query (U.S. mirror, CfA/Harvard)
ESO/Uppsala Survey -- ESO 235- G 021 VizieR Catalog Query (U.S. mirror, CfA/Harvard)
2MASS Extended Source Images (JHKs) -- 2MASX J20581033-4837491 NASA/IPAC Infrared Science Archive (IRSA)
IRAS Point Source Catalog -- IRAS 20546-4849 VizieR Catalog Query (U.S. mirror, CfA/Harvard)
IRAS Faint Source Catalog -- IRAS F20547-4849 VizieR Catalog Query (U.S. mirror, CfA/Harvard)
The ESO-LV catalog-- ESO-LV 2350210 VizieR Catalog Query (U.S. mirror, CfA/Harvard)
Query 6dF Galaxy Redshift Survey -- 6dF J2058103-483749 6dF Galaxy Redshift Survey
Query 6dF Galaxy Redshift Survey -- 6dF J2058104-483749 6dF Galaxy Redshift Survey
Query 6dF Galaxy Redshift Survey -- 6dFGSv 10001 6dF Galaxy Redshift Survey
Catalogue of Principal Galaxies -- PGC 065807 VizieR Catalog Query (U.S. mirror, CfA/Harvard)
Retrieve mean data from LEDA -- PGC 065807 The Lyon/Meudon Extragalactic Database (LEDA)
Query GALEX (NUV/FUV) Mission Archive (7.2 arcsec search radius) -- NGC 6987GALEX Mission Data Archive at MAST
Explore IRSA resources with RADAR (10 arcsec search radius) -- NGC 6987NASA/IPAC Infrared Science Archive (IRSA)
Resources for position 20h58m10.3s, -48d37m49s (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)
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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