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Home » Search Objects » By Name

Help Detailed Information for a Named Object

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Cosmological Parameters

Results for object NGC 0021 (NGC 21)

  • Overview
  • Cross-IDs (24)
  • Coordinates (19)
  • Redshifts (15)
  • Distances (15)
  • Classifications (23)
  • Galactic Extinctions
  • Notes (3)
  • Diameters (7)
  • Photometry & SED (52)
  • Spectra (3)
  • Images (3)
  • References (72)
  • External Links
  • Survey Coverage
SED Plot Loading...
IRSA
FinderChart
ImagePOSS-II F (North), AAO-SES/SERC-ER (South), Red image
View in IRSA Finderchart
Image Credit: Caltech or AAO/ROE

Selected data and derived quantities for NGC 0021†.  More information in the tabs above.
Cross-identificationsEssential note
NGC 0021; NGC 0029; UGC 00100; CGCG 499-066; CGCG 0008.1+3305
Coordinates for Preferred Position
Equatorial (J2000)Galactic
RA, DecRA, Dec [Deg]Unc Semi-major,minor ["]Unc PA [deg]ReferenceLon, Lat [deg]
00h10m46.90s, +33d21m10.2s2.695417, 33.3528331.25E+00, 1.25E+00 020032MASX.C.......:113.252508, -28.753570
Preferred Redshift & Derived Quantities [H0 = 67.8 km/sec/Mpc], Ωmatter = 0.308, Ωvacuum = 0.692]Redshift-independent Distances
z (Helio)V (Helio) [km/s]ReferenceV (CMB) [km/s]Hubble Distance (CMB) [Mpc]# Measurements
0.01591 +/- 0.000014769.998468 +/- 3.8973021999PASP..111..438F 4448 +/- 23 65.60 +/- 4.6015
Classifications
Object TypeMorphologyReferenceActivity TypeReferenceOther
GSAB(s)bc:1991RC3.9.C...0000dSAB(s)bc:
Quick-look Angular & Physical DiametersForeground Galactic Extinction (2011ApJ...737..103S)
PassbandDiameter ["]ReferenceDiameter [kpc]Aλ [mag] VAλ [mag] K
RC3 D_0 (blue) 106.701991RC3.9.C...0000d36.99 0.1060.012
Quick-look Photometry & Luminosities (brightest flux in each spectral region)
Spectral regionBandApparent mag or fluxReferenceAbsolute Mag or νLν [W]νLν [L☉(bol)]
X-Ray
UV
Visible I 12.01 mag 2007ApJS..172..599S -2.22E+01 [mag] 2.41E+10
Near-IR H 10.614 +/- 0.031 mag 20032MASX.C.......: -23.65 +/- 0.15 [mag] 1.69E+10 +/- 1.10E+09
Far-IR 100 microns (IRAS) 2.359E+00 +/- 9 % Jy 1990IRASF.C...0000M 4.33E+36 +/- 4.64E+35 [W] 1.13E+10 +/- 1.21E+09
Radio 1.4GHz 9.1 +/- 1.1 milliJy 1998AJ....115.1693C 7.79E+30 +/- 1.05E+30 [W] 2.03E+04 +/- 2.72E+03
 †Derived quantities are based on the median redshift-independent distance when available, otherwise the preferred redshift is used with the selected cosmological parameters (which can be changed in search options).
 Cosmological params can be changed in search options.
Cross-identifications for NGC 0021
Coordinates for NGC 0021
Preferred Position:  00h10m46.90s +33d21m10.2s Equatorial J2000.0  (20032MASX.C.......:)
Preferred Position of NGC 0021
Reference FrameLongitudeLatitudeLongitudeLatitudeUncertainty Ellipse (arcsec)
Decimal DegreesDecimal DegreesSexagesimalSexagesimalSemimajor (a)Semiminor (b)PA (deg)
RA/Dec Equatorial (J2000.0)2.69541733.35283300h10m46.90s+33d21m10.2s1.25E+001.25E+00 0
RA/Dec Equatorial (B1950.0)2.04718833.07471600h08m11.32s+33d04m29.0s1.25E+001.25E+00 0
Galactic113.252508-28.7535701.25E+001.25E+00 0
Supergalactic327.10499517.6436121.25E+001.25E+00 0
Ecliptic (J2000.0)16.97742629.2617581.25E+001.25E+00 0
Ecliptic (B1950.0)16.28229129.2594221.25E+001.25E+00 0
Measured Positions for NGC 0021
Redshifts and Derived Quantities for NGC 0021
Preferred Redshift: Z = 0.01591, H0 = 67.8 km/sec/Mpc, Ωmatter = 0.308, Ωvacuum = 0.692
Quantities Derived from Preferred Redshift for NGC 0021 
Calculated and Corrected Velocities
TypeVelocitiesReference   
V (Heliocentric) 4770 ± 4 km/s1999PASP..111..438F
V (Kinematic LSR) 4775 ± 4 km/s1986MNRAS.221.1023K
V (Galactocentric GSR) 4950 ± 8 km/s1991RC3.9.C...0000d
V (Local Group) 5040 ± 17 km/s1996AJ....111..794K
V (3K CMB) 4448 ± 23 km/s1996ApJ...473..576F
V (Virgo Infall only) 4934 ± 18 km/s2000ApJ...529..786M
V (Virgo + GA only) 4741 ± 23 km/s2000ApJ...529..786M
V (Virgo + GA + Shapley) 4722 ± 23 km/s2000ApJ...529..786M
Hubble Flow Distance and Distance Modulus (where H0 = 67.8 km/sec/Mpc ± km/sec/Mpc)
TypeDistanceModulus
D (Galactocentric GSR) 73.02 ± 5.11 Mpc(m-M) = 34.32 ± 0.15 mag
D (Local Group) 74.33 ± 5.21 Mpc(m-M) = 34.36 ± 0.15 mag
D (3K CMB) 65.60 ± 4.60 Mpc(m-M) = 34.08 ± 0.15 mag
D (Virgo Infall only) 72.77 ± 5.10 Mpc(m-M) = 34.31 ± 0.15 mag
D (Virgo + GA only) 69.93 ± 4.90 Mpc(m-M) = 34.22 ± 0.15 mag
D (Virgo + GA + Shapley) 69.65 ± 4.88 Mpc(m-M) = 34.21 ± 0.15 mag
Scale at Hubble Flow Distances
TypeValues
Scale (Galactocentric GSR) 354 pc/arcsec = 0.354 kpc/arcsec = 21.24 kpc/arcmin = 1.27 Mpc/degree
Scale (Local Group) 360 pc/arcsec = 0.360 kpc/arcsec = 21.62 kpc/arcmin = 1.30 Mpc/degree
Scale (3K CMB) 318 pc/arcsec = 0.318 kpc/arcsec = 19.08 kpc/arcmin = 1.14 Mpc/degree
Scale (Virgo Infall only) 353 pc/arcsec = 0.353 kpc/arcsec = 21.17 kpc/arcmin = 1.27 Mpc/degree
Scale (Virgo + GA only) 339 pc/arcsec = 0.339 kpc/arcsec = 20.34 kpc/arcmin = 1.22 Mpc/degree
Scale (Virgo + GA + Shapley) 338 pc/arcsec = 0.338 kpc/arcsec = 20.26 kpc/arcmin = 1.22 Mpc/degree
Cosmology-Corrected Quantities [H0 = 67.8 km/sec/Mpc, Ωmatter = 0.308, Ωvacuum = 0.692]
[Redshift 0.014836 as corrected to the Reference Frame defined by the 3K CMB]
TypeValues
Luminosity Distance66.3 Mpc (m-M) = 34.11 mag
Angular-Size Distance64.4 (m-M) = 34.05 mag
Co-Moving Radial Distance65.4 (m-M) = 34.08 mag
Co-Moving Tangential Distance65.4 (m-M) = 34.08 mag
Co-Moving Volume0.00117 Gpc^3
Light Travel-Time 0.212 Gyr
Age at Redshift 0.014836 13.593 Gyr
Age of Universe 13.804 Gyr
Scale (Cosmology Corrected) 312 pc/arcsec = 0.312 kpc/arcsec = 18.74 kpc/arcmin = 1.12 Mpc/degree
Surface Brightness DimmingFlux Density per Unit Area = 0.94279; Magnitude per Unit Area = 0.06396 mag
Measured Redshifts of NGC 0021
See also Distances.
Redshift-independent Distances for NGC 0021
See also Redshifts.
Classifications for NGC 0021
Galaxy Extinctions for NGC 0021
Notes for NGC 0021
Measured Diameters for NGC 0021
Photometry & SED for NGC 0021
Quick-look Photometry & SED plot for NGC 0021
Quick Look Photometry & Luminosities (brightest flux in each spectral region)
SED Plot
Photometry for NGC 0021
See also Spectra.

Images for object NGC 0021 (NGC 21)

IRSA
FinderChart
ImagePOSS-II F (North), AAO-SES/SERC-ER (South), Red image
View in IRSA Finderchart

Image Credit: Caltech or AAO/ROE

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Literature References for NGC 0021
External Resource Links for NGC 0021
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