NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-06-17 T20:24:52 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. 1

INDEX for NGC 6557
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
   
27 Photometric data point(s) and SED   
Spectra   
Redshift-Independent Distances
46 Reference(s)   
15 Position data point(s)
7 Redshift data point(s)   
5 Diameter data point(s)   
3 Note(s)   
ESO data    
PKS data    
RC3 data    

ESSENTIAL NOTE for NGC 6557 (Back to INDEX)
N/A

CROSS-IDENTIFICATIONS for NGC 6557 (Back to INDEX)
Object Names Type Object Names Type
NGC 6557G PKS B1814-766 RadioS
ESO 045- G 001 G PKS J1821-7634 RadioS
ESO 181412-7636.3 G PMN J1821-7635 RadioS
AM 1814-763 NED01 G PMNM 181411.5-763619 RadioS
2MASX J18212466-7634598 IrS MRC 1814-766 RadioS
2MASS J18212481-7635001 IrS SUMSS J182124-763459 RadioS
SGC 181412-7636.3 G AT20G J182125-763459 RadioS
6dF J1821247-763500 G CRATES J1821-7635 RadioS
6dFGSv 08924 G CRATES J182124.61-763500.6 RadioS
LDCE 1302 NED002 G IERS B1814-766 RadioS
HDCE 1038 NED002 G [HRT2007] J182123-763505 RadioS
LQAC 275-076 001 G [MSC2011] J182124.84-763459.8 G
LCS1 J1821-7635 RadioS    
PGC 061770 G    

COORDINATES for NGC 6557 (Back to INDEX)

Position Reference:1996A&AS..120..201L

Reference    Frame     Longitude    Latitude        RA           DEC      Uncertainty Ellipse (arcsec)
                       (degrees)   (degrees)                              Semimajor Semiminor  PA(deg)
Equatorial (B1950.0)  273.547919  -76.604545 18h14m11.500s -76d36m16.36s  1.22E+00  9.90E-01    1
Equatorial (J2000.0)  275.353426  -76.582968 18h21m24.822s -76d34m58.68s  1.22E+00  9.90E-01    0
Ecliptic   (B1950.0)  271.370623  -53.175641                              1.22E+00  9.90E-01    4
Ecliptic   (J2000.0)  272.070269  -53.182151                              1.22E+00  9.90E-01    4
Galactic              317.589945  -24.617650                              1.22E+00  9.90E-01   76
SuperGalactic         204.505854   -2.429319                              1.22E+00  9.90E-01  172
Additional detailed measurements with references are also available by clicking below:
15 Position data point(s)

REDSHIFT-INDEPENDENT DISTANCES for NGC 6557 (Back to INDEX)

5 Distances found in NED View 5 Individual Distance Measurement(s) for NGC 6557

Summary Statistics computed by NED from 5 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 6557 Distance Modulus
(mag)
Metric Distance
(Mpc)
Mean 33.83 58.740
Std. Dev. 0.30 8.288
Min. 33.49 49.800
Max. 34.25 70.900
Median 33.82 58.100

CLASSIFICATIONS (TYPES, ATTRIBUTES) for NGC 6557 (Back to INDEX)
TypeAs PublishedNED HomogenizedFlagReference Code
Galaxy MorphologySA0^0(r)SA0^0(r)...1991RC3.9.C...0000d
Activity TypeFlat-Spectrum Radio Source,Flat-Spectrum Radio Source...2007ApJS..171...61H
Distance IndicatorTully-FisherTully-Fisher...2007A&A...465...71T
7 Detailed Classification(s)


FOREGROUND GALACTIC EXTINCTION for NGC 6557 (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]0.7830.6550.4950.3920.2720.7660.5970.4130.3070.2280.1280.0810.0550.028
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]1.0160.8070.6200.5000.3630.9640.7090.5140.3900.2770.1690.1080.0690.029


Galactic Extinction based on H I Column Densities and Galaxy Counts
(Burstein & Heiles; 1982AJ.....87.1165B) assuming Rv = 3.1:
AB = 0.720 mag
See Notes on Galactic Extinction for important caveats.

BASIC DATA for NGC 6557 (Back to INDEX)
Helio. Radial Velocity     :      5503 +/-       45 km/s      
Redshift                   :  0.018356 +/- 0.000150        20096dF...C...0000J
Major Diameter (arcmin)    :   1.6
Minor Diameter (arcmin)    :   1.1
Magnitude and Filter       : 14.3 
Classifications            : SA(r)0^0^           

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:
7 Redshift data point(s)      27 photometric data point(s)      5 Diameter data point(s)      

QUANTITIES DERIVED FROM REDSHIFT for NGC 6557 (Details)(Back to INDEX)
Calculated and Corrected Velocities
V (Heliocentric)           :    5503 +/-     45 km/s      20096dF...C...0000J
V (Kinematic LSR)          :    5497 +/-     45 km/s      1986MNRAS.221.1023K
V (Galactocentric GSR)     :    5364 +/-     45 km/s      1991RC3.9.C...0000d
V (Local Group)            :    5308 +/-     46 km/s      1996AJ....111..794K
V (3K CMB)                 :    5521 +/-     45 km/s      1996ApJ...473..576F
V (Virgo Infall only)      :    5302 +/-     46 km/s      2000ApJ...529..786M
V (Virgo + GA only)        :    5864 +/-     61 km/s      2000ApJ...529..786M
V (Virgo + GA + Shapley)   :    5896 +/-     61 km/s      2000ApJ...529..786M

Hubble Flow Distance and Distance Modulus (where Ho =   73.0 +/-   5 km/sec/Mpc)
D (Galactocentric GSR)     :    73.5 +/-    5.2 Mpc      (m-M) = 34.33 +/- 0.15 mag
D (Local Group)            :    72.7 +/-    5.1 Mpc      (m-M) = 34.31 +/- 0.15 mag
D (3K CMB)                 :    75.6 +/-    5.3 Mpc      (m-M) = 34.39 +/- 0.15 mag
D (Virgo Infall only)      :    72.6 +/-    5.1 Mpc      (m-M) = 34.31 +/- 0.15 mag
D (Virgo + GA only)        :    80.3 +/-    5.7 Mpc      (m-M) = 34.52 +/- 0.15 mag
D (Virgo + GA + Shapley)   :    80.8 +/-    5.7 Mpc      (m-M) = 34.54 +/- 0.15 mag

Scale at Hubble Flow Distances
Scale (Galactocentric GSR) :     356 pc/arcsec =  0.356 kpc/arcsec =  21.37 kpc/arcmin =   1.28 Mpc/degree
Scale (Local Group)        :     353 pc/arcsec =  0.353 kpc/arcsec =  21.15 kpc/arcmin =   1.27 Mpc/degree
Scale (3K CMB)             :     367 pc/arcsec =  0.367 kpc/arcsec =  22.00 kpc/arcmin =   1.32 Mpc/degree
Scale (Virgo Infall only)  :     352 pc/arcsec =  0.352 kpc/arcsec =  21.13 kpc/arcmin =   1.27 Mpc/degree
Scale (Virgo + GA only)    :     389 pc/arcsec =  0.389 kpc/arcsec =  23.37 kpc/arcmin =   1.40 Mpc/degree
Scale(Virgo + GA + Shapley):     392 pc/arcsec =  0.392 kpc/arcsec =  23.49 kpc/arcmin =   1.41 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 = 4.257 arcmin and Selected Redshift, defined by the Velocity Range: from to km/sec where V(Heliocentric) = 5503 km/sec
Cosmology-Corrected Quantities [Ho = 73.00 km/sec/Mpc, Ωmatter = 0.27, Ωvacuum = 0.73] [Redshift 0.018417 as corrected to the Reference Frame defined by the 3K Microwave Background Radiation] Luminosity Distance : 76.7 Mpc (m-M) = 34.43 mag Angular-Size Distance : 74 Mpc (m-M) = 34.35 mag Co-Moving Radial Distance : 75.4 Mpc (m-M) = 34.39 mag Co-Moving Tangential Dist. : 75.4 Mpc (m-M) = 34.39 mag Co-Moving Volume : 0.00179 Gpc^3 Light Travel-Time : 0.244 Gyr Age at Redshift 0.018417 : 13.055 Gyr Age of Universe : 13.299 Gyr Scale (Cosmology Corrected): 359 pc/arcsec = 0.359 kpc/arcsec = 21.52 kpc/arcmin = 1.29 Mpc/degree Surface Brightness Dimming : Flux Density per Unit Area = 0.92960; Magnitude per Unit Area = 0.07926 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 6557 (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 9.570 +/- 0.021 mag 20032MASX.C.......:-24.26 +/- 0.32 [mag] 2.97E+10 +/- 3.79E+09
Radio408 MHz 1.04 +/- 0.05 Jy 1981MNRAS.194..693L 1.75E+32 +/- 2.37E+31 [W] 4.56E+05 +/- 6.15E+04
NOTE: The above quantities are derived using an estimated Distance Modulus of (33.83 +/- 0.30) mag corresponding to
a Metric Distance of (58.740 +/- 8.288) 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 27 Photometric data point(s) available in NED.

QUICK-LOOK ANGULAR & PHYSICAL DIAMETERS for NGC 6557 (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_0 (blue) 111.70...... 25.0 B-mag arcsec^-2^ 1991RC3.9.C...0000d31.81...
K_s (2MASS "total") 119.1076.2275 Diameter for "total" magnitude 20032MASX.C.......:20032MASX.C.......:33.9221.71
NOTE: Physical diameters are derived using a scale of 0.2848 kpc/arcsec based on Average NED-D Metric Distance of (58.740 +/- 8.288) Mpc.
The quantities quoted above have not necessarily been corrected for foreground extinction.

View details for 5 Diameter data point(s) available in NED.

EXTERNAL ARCHIVES AND SERVICES for NGC 6557 Help (Back to INDEX)
Resources for Object NamesSite/Service
Query SIMBAD by primary NED object name -- NGC 6557SIMBAD (CDS, Strasbourg, France)
Revised New General Catalogue -- NGC 6557VizieR Catalog Query (U.S. mirror, CfA/Harvard)
ESO/Uppsala Survey -- ESO 045- G 001 VizieR Catalog Query (U.S. mirror, CfA/Harvard)
2MASS Extended Source Images (JHKs) -- 2MASX J18212466-7634598 NASA/IPAC Infrared Science Archive (IRSA)
Query 6dF Galaxy Redshift Survey -- 6dF J1821247-763500 6dF Galaxy Redshift Survey
Query 6dF Galaxy Redshift Survey -- 6dFGSv 08924 6dF Galaxy Redshift Survey
Catalogue of Principal Galaxies -- PGC 061770 VizieR Catalog Query (U.S. mirror, CfA/Harvard)
Retrieve mean data from LEDA -- PGC 061770 The Lyon/Meudon Extragalactic Database (LEDA)
Parkes Radio Sources Catalogue -- PKS B1814-766 VizieR Catalog Query (U.S. mirror, CfA/Harvard)
Parkes-MIT-NRAO 4.85GHz Surveys -- PMN J1821-7635 VizieR Catalog Query (U.S. mirror, CfA/Harvard)
Query GALEX (NUV/FUV) Mission Archive (7.2 arcsec search radius) -- NGC 6557GALEX Mission Data Archive at MAST
Explore IRSA resources with RADAR (10 arcsec search radius) -- NGC 6557NASA/IPAC Infrared Science Archive (IRSA)
Resources for position 18h21m24.8s, -76d34m59s (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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