NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2018-12-14 T19:32:42 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 NGC 2998


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    NGC 2998                       09h48m43.6s +44d04m53s G        4784  0.015958      13.4g    ...   197     8   71   24    19   16     0 Retrieve Retrieve 1   

Detailed information for each object


Object No. 1 - NGC 2998

INDEX for NGC 2998
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
   
71 Photometric data point(s) and SED   
Spectra   
Redshift-Independent Distances
197 Reference(s)   
24 Position data point(s)
19 Redshift data point(s)   
16 Diameter data point(s)   
8 Note(s)   
UGC data    
RC3 data    

ESSENTIAL NOTE for NGC 2998 (Back to INDEX)
N/A

CROSS-IDENTIFICATIONS for NGC 2998 (Back to INDEX)
Object Names Type Object Names Type
NGC 2998G LDCE 0680 NED001 G
UGC 05250 G USGC U261 NED05 G
KUG 0945+443 G ASK 208508.0 G
CGCG 210-036 G HOLM 144A G
CGCG 0945.5+4418 G NSA 036473 G
MCG +07-20-051 G PGC 028196 G
2MASX J09484363+4404526 IrS UZC J094843.6+440452 G
2MASXi J0948437+440452 IrS NVSS J094843+440451 RadioS
2MASS J09484363+4404532 IrS [M98j] 074 NED01 G
SDSS J094843.62+440453.1 G [BFW2006] J147.18180+44.08143 G
SDSS J094843.63+440453.1 G Mr18:[BFW2006] 06896 NED02 G
SDSS J094843.63+440453.2 G Mr19:[BFW2006] 14428 NED02 G
IRAS 09455+4418 IrS Mr20:[BFW2006] 23789 NED02 G
IRAS F09455+4418 IrS [TTL2012] 072436 G
AKARI J0948439+440454 IrS    
WBL 241-001 G    

COORDINATES for NGC 2998 (Back to INDEX)

Position Reference:2007SDSS6.C...0000:

Reference    Frame     Longitude    Latitude        RA           DEC      Uncertainty Ellipse (arcsec)
                       (degrees)   (degrees)                              Semimajor Semiminor  PA(deg)
Equatorial (B1950.0)  146.392946   44.314307 09h45m34.307s +44d18m51.50s  5.00E-01  5.00E-01    0
Equatorial (J2000.0)  147.181802   44.081438 09h48m43.632s +44d04m53.18s  5.00E-01  5.00E-01    0
Ecliptic   (B1950.0)  132.899705   28.903835                              5.00E-01  5.00E-01    0
Ecliptic   (J2000.0)  133.600830   28.908217                              5.00E-01  5.00E-01    0
Galactic              175.718142   49.810290                              5.00E-01  5.00E-01    0
SuperGalactic          57.789612  -18.291755                              5.00E-01  5.00E-01    0
Additional detailed measurements with references are also available by clicking below:
24 Position data point(s)

REDSHIFT-INDEPENDENT DISTANCES for NGC 2998 (Back to INDEX)

16 Distances found in NED View 16 Individual Distance Measurement(s) for NGC 2998

Summary Statistics computed by NED from 16 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 2998 Distance Modulus
(mag)
Metric Distance
(Mpc)
Mean 33.86 59.663
Std. Dev. 0.26 6.645
Min. 33.26 44.900
Max. 34.19 68.900
Median 33.93 60.900

CLASSIFICATIONS (TYPES, ATTRIBUTES) for NGC 2998 (Back to INDEX)
TypeAs PublishedNED HomogenizedFlagReference Code
HierarchyF?Possible field galaxy...1976ApJS...32..409T
KinematicsHI line widthHI line width...1994AJ....108..896M
Luminosity Class5.0LC III...1991RC3.9.C...0000d
Galaxy MorphologySAB(rs)cSAB(rs)c...1991RC3.9.C...0000d
Distance IndicatorTully-FisherTully-Fisher...2009ApJS..182..474S
44 Detailed Classification(s)


FOREGROUND GALACTIC EXTINCTION for NGC 2998 (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]0.0580.0490.0370.0290.0200.0570.0440.0310.0230.0170.0100.0060.0040.002
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]0.0720.0570.0440.0350.0260.0680.0500.0360.0280.0200.0120.0080.0050.002


Galactic Extinction based on H I Column Densities and Galaxy Counts
(Burstein & Heiles; 1982AJ.....87.1165B) assuming Rv = 3.1:
AB = 0.000 mag
See Notes on Galactic Extinction for important caveats.

BASIC DATA for NGC 2998 (Back to INDEX)
Helio. Radial Velocity     :      4784 +/-        2 km/s      
Redshift                   :  0.015958 +/- 0.000007        1998A&AS..130..333T
Major Diameter (arcmin)    :  2.07
Minor Diameter (arcmin)    :  0.93
Magnitude and Filter       : 13.4g
Classifications            : SAB(rs)c            

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:
19 Redshift data point(s)      71 photometric data point(s)      16 Diameter data point(s)      

QUANTITIES DERIVED FROM REDSHIFT for NGC 2998 (Details)(Back to INDEX)
Calculated and Corrected Velocities
V (Heliocentric)           :    4784 +/-      2 km/s      1998A&AS..130..333T
V (Kinematic LSR)          :    4784 +/-      2 km/s      1986MNRAS.221.1023K
V (Galactocentric GSR)     :    4795 +/-      2 km/s      1991RC3.9.C...0000d
V (Local Group)            :    4793 +/-      2 km/s      1996AJ....111..794K
V (3K CMB)                 :    5000 +/-     15 km/s      1996ApJ...473..576F
V (Virgo Infall only)      :    4974 +/-     13 km/s      2000ApJ...529..786M
V (Virgo + GA only)        :    5098 +/-     15 km/s      2000ApJ...529..786M
V (Virgo + GA + Shapley)   :    5125 +/-     16 km/s      2000ApJ...529..786M

Hubble Flow Distance and Distance Modulus (where Ho =   73.0 +/-   5 km/sec/Mpc)
D (Galactocentric GSR)     :    65.7 +/-    4.6 Mpc      (m-M) = 34.09 +/- 0.15 mag
D (Local Group)            :    65.7 +/-    4.6 Mpc      (m-M) = 34.09 +/- 0.15 mag
D (3K CMB)                 :    68.5 +/-    4.8 Mpc      (m-M) = 34.18 +/- 0.15 mag
D (Virgo Infall only)      :    68.1 +/-    4.8 Mpc      (m-M) = 34.17 +/- 0.15 mag
D (Virgo + GA only)        :    69.8 +/-    4.9 Mpc      (m-M) = 34.22 +/- 0.15 mag
D (Virgo + GA + Shapley)   :    70.2 +/-    4.9 Mpc      (m-M) = 34.23 +/- 0.15 mag

Scale at Hubble Flow Distances
Scale (Galactocentric GSR) :     318 pc/arcsec =  0.318 kpc/arcsec =  19.11 kpc/arcmin =   1.15 Mpc/degree
Scale (Local Group)        :     318 pc/arcsec =  0.318 kpc/arcsec =  19.10 kpc/arcmin =   1.15 Mpc/degree
Scale (3K CMB)             :     332 pc/arcsec =  0.332 kpc/arcsec =  19.92 kpc/arcmin =   1.20 Mpc/degree
Scale (Virgo Infall only)  :     330 pc/arcsec =  0.330 kpc/arcsec =  19.82 kpc/arcmin =   1.19 Mpc/degree
Scale (Virgo + GA only)    :     339 pc/arcsec =  0.339 kpc/arcsec =  20.31 kpc/arcmin =   1.22 Mpc/degree
Scale(Virgo + GA + Shapley):     340 pc/arcsec =  0.340 kpc/arcsec =  20.42 kpc/arcmin =   1.23 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 = 4.897 arcmin and Selected Redshift, defined by the Velocity Range: from to km/sec where V(Heliocentric) = 4784 km/sec
Cosmology-Corrected Quantities [Ho = 73.00 km/sec/Mpc, Ωmatter = 0.27, Ωvacuum = 0.73] [Redshift 0.016678 as corrected to the Reference Frame defined by the 3K Microwave Background Radiation] Luminosity Distance : 69.4 Mpc (m-M) = 34.21 mag Angular-Size Distance : 67.1 Mpc (m-M) = 34.13 mag Co-Moving Radial Distance : 68.3 Mpc (m-M) = 34.17 mag Co-Moving Tangential Dist. : 68.3 Mpc (m-M) = 34.17 mag Co-Moving Volume : 0.00133 Gpc^3 Light Travel-Time : 0.221 Gyr Age at Redshift 0.016678 : 13.078 Gyr Age of Universe : 13.299 Gyr Scale (Cosmology Corrected): 326 pc/arcsec = 0.326 kpc/arcsec = 19.53 kpc/arcmin = 1.17 Mpc/degree Surface Brightness Dimming : Flux Density per Unit Area = 0.93598; Magnitude per Unit Area = 0.07183 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 2998 (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)]
VisualI 11.55 mag 2007ApJS..172..599S-22.31 [mag] 2.57E+10
Near-InfraredF_H (total) 2.09 +/- 1.50 log milliJy 1995ApJ...453..616S 9.64E+36 +/- 2.56E+36 [W] 2.51E+10 +/- 6.65E+09
Mid-Infrared25 microns (IRAS) 1.544E-01 +/- 19 % Jy 1990IRASF.C...0000M 7.87E+35 +/- 1.52E+35 [W] 2.05E+09 +/- 3.96E+08
Far-Infrared100 microns (IRAS) 4.633E+00 +/- 8 % Jy 1990IRASF.C...0000M 5.92E+36 +/- 5.77E+35 [W] 1.54E+10 +/- 1.50E+09
Radio1.4GHz 20.8 +/- 1.6 milliJy 1998AJ....115.1693C 1.24E+31 +/- 1.18E+30 [W] 3.23E+04 +/- 3.06E+03
NOTE: The above quantities are derived using an estimated Distance Modulus of (33.86 +/- 0.26) mag corresponding to
a Metric Distance of (59.663 +/- 6.645) 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 71 Photometric data point(s) available in NED.

QUICK-LOOK ANGULAR & PHYSICAL DIAMETERS for NGC 2998 (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]
POSS1 103a-O 180.0072.00... Low surface brightness 1964MCG2..C...0000V52.0720.83
K_s (2MASS "total") 121.6058.3740 Diameter for "total" magnitude 20032MASX.C.......:20032MASX.C.......:35.1716.88
NOTE: Physical diameters are derived using a scale of 0.2893 kpc/arcsec based on Average NED-D Metric Distance of (59.663 +/- 6.645) Mpc.
The quantities quoted above have not necessarily been corrected for foreground extinction.

View details for 16 Diameter data point(s) available in NED.

EXTERNAL ARCHIVES AND SERVICES for NGC 2998 Help (Back to INDEX)
Resources for Object NamesSite/Service
Query SIMBAD by primary NED object name -- NGC 2998SIMBAD (CDS, Strasbourg, France)
Revised New General Catalogue -- NGC 2998VizieR Catalog Query (U.S. mirror, CfA/Harvard)
Uppsala General Catalog -- UGC 05250 VizieR Catalog Query (U.S. mirror, CfA/Harvard)
Original Zwicky Catalog -- CGCG 210-036 VizieR Catalog Query (U.S. mirror, CfA/Harvard)
Query UZC Spectral Archive (60 arcsec search radius)Updated Zwicky Catalog Data (Harvard/SAO)
Morphological Catalog of Galaxies -- MCG +07-20-051 VizieR Catalog Query (U.S. mirror, CfA/Harvard)
2MASS Extended Source Images (JHKs) -- 2MASX J09484363+4404526 NASA/IPAC Infrared Science Archive (IRSA)
2MASS Extended Source Images (JHKs) -- 2MASXi J0948437+440452 NASA/IPAC Infrared Science Archive (IRSA)
version
SDSS Sky Server
IRAS Point Source Catalog -- IRAS 09455+4418 VizieR Catalog Query (U.S. mirror, CfA/Harvard)
IRAS Faint Source Catalog -- IRAS F09455+4418 VizieR Catalog Query (U.S. mirror, CfA/Harvard)
Catalogue of Principal Galaxies -- PGC 028196 VizieR Catalog Query (U.S. mirror, CfA/Harvard)
Retrieve mean data from LEDA -- PGC 028196 The Lyon/Meudon Extragalactic Database (LEDA)
NRAO/VLA Sky Survey (NVSS)
Query GALEX (NUV/FUV) Mission Archive (7.2 arcsec search radius) -- NGC 2998GALEX Mission Data Archive at MAST
Explore IRSA resources with RADAR (10 arcsec search radius) -- NGC 2998NASA/IPAC Infrared Science Archive (IRSA)
Resources for position 09h48m43.6s, +44d04m53s (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)
    Size:     GIF     FITS File  
Faint Images of the Radio Sky at Twenty-Centimeters
The NRAO Data Archive System

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