SOURCE LISTRow 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 2945 09h37m41.1s -22d02m06s G 4630 0.015444 13.22 ... 45 2 32 6 4 17 0 Retrieve Retrieve 1 |
INDEX for NGC 2945 | |||
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Detailed Data (NED queries): |
ESSENTIAL NOTE for NGC 2945 (Back to INDEX)N/A |
CROSS-IDENTIFICATIONS for NGC 2945 (Back to INDEX)
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COORDINATES for NGC 2945 (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) 143.846431 -21.809421 09h35m23.14s -21d48m33.9s 1.25E+00 1.25E+00 0 Equatorial (J2000.0) 144.421375 -22.035056 09h37m41.13s -22d02m06.2s 1.25E+00 1.25E+00 0 Ecliptic (B1950.0) 154.679599 -33.971216 1.25E+00 1.25E+00 0 Ecliptic (J2000.0) 155.373945 -33.969018 1.25E+00 1.25E+00 0 Galactic 254.463664 22.101113 1.25E+00 1.25E+00 0 SuperGalactic 132.238261 -51.115925 1.25E+00 1.25E+00 0Additional detailed measurements with references are also available by clicking below: 6 Position data point(s) |
REDSHIFT-INDEPENDENT DISTANCES for NGC 2945 (Back to INDEX) 2 Distances found in NED View 2 Individual Distance Measurement(s) for NGC 2945 Summary Statistics computed by NED from 2 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.
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CLASSIFICATIONS (TYPES, ATTRIBUTES) for NGC 2945 (Back to INDEX)
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FOREGROUND GALACTIC EXTINCTION for NGC 2945 (Back to INDEX)Galactic Extinction from the Schlafly & Finkbeiner 2011, Appendix; 2011ApJ...737..103S (SF11) recalibration
For completeness, we include the original SFD98 values:
Galactic Extinction based on H I Column Densities and Galaxy Counts (Burstein & Heiles; 1982AJ.....87.1165B) assuming Rv = 3.1: AB = 0.120 mag See Notes on Galactic Extinction for important caveats. |
BASIC DATA for NGC 2945 (Back to INDEX)Helio. Radial Velocity : 4630 +/- 15 km/s Redshift : 0.015444 +/- 0.000050 1991RC3.9.C...0000d Major Diameter (arcmin) : 1.6 Minor Diameter (arcmin) : 1.2 Magnitude and Filter : 13.22 Classifications : SA0-: AGN NOTE: This information is indicative only. With the exception of the |
QUANTITIES DERIVED FROM REDSHIFT for NGC 2945 (Details)(Back to INDEX)Calculated and Corrected Velocities V (Heliocentric) : 4630 +/- 15 km/s 1991RC3.9.C...0000d V (Kinematic LSR) : 4617 +/- 15 km/s 1986MNRAS.221.1023K V (Galactocentric GSR) : 4423 +/- 17 km/s 1991RC3.9.C...0000d V (Local Group) : 4345 +/- 23 km/s 1996AJ....111..794K V (3K CMB) : 4960 +/- 28 km/s 1996ApJ...473..576F V (Virgo Infall only) : 4509 +/- 25 km/s 2000ApJ...529..786M V (Virgo + GA only) : 4970 +/- 41 km/s 2000ApJ...529..786M V (Virgo + GA + Shapley) : 4992 +/- 41 km/s 2000ApJ...529..786M Hubble Flow Distance and Distance Modulus (where Ho = 73.0 +/- 5 km/sec/Mpc) D (Galactocentric GSR) : 60.6 +/- 4.2 Mpc (m-M) = 33.91 +/- 0.15 mag D (Local Group) : 59.5 +/- 4.2 Mpc (m-M) = 33.87 +/- 0.15 mag D (3K CMB) : 67.9 +/- 4.8 Mpc (m-M) = 34.16 +/- 0.15 mag D (Virgo Infall only) : 61.8 +/- 4.3 Mpc (m-M) = 33.95 +/- 0.15 mag D (Virgo + GA only) : 68.1 +/- 4.8 Mpc (m-M) = 34.17 +/- 0.15 mag D (Virgo + GA + Shapley) : 68.4 +/- 4.8 Mpc (m-M) = 34.17 +/- 0.15 mag Scale at Hubble Flow Distances Scale (Galactocentric GSR) : 294 pc/arcsec = 0.294 kpc/arcsec = 17.63 kpc/arcmin = 1.06 Mpc/degree Scale (Local Group) : 289 pc/arcsec = 0.289 kpc/arcsec = 17.31 kpc/arcmin = 1.04 Mpc/degree Scale (3K CMB) : 329 pc/arcsec = 0.329 kpc/arcsec = 19.76 kpc/arcmin = 1.19 Mpc/degree Scale (Virgo Infall only) : 299 pc/arcsec = 0.299 kpc/arcsec = 17.97 kpc/arcmin = 1.08 Mpc/degree Scale (Virgo + GA only) : 330 pc/arcsec = 0.330 kpc/arcsec = 19.81 kpc/arcmin = 1.19 Mpc/degree Scale(Virgo + GA + Shapley): 332 pc/arcsec = 0.332 kpc/arcsec = 19.89 kpc/arcmin = 1.19 Mpc/degree |
QUICK-LOOK PHOTOMETRY and LUMINOSITIES for NGC 2945 (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).
a Metric Distance of (81.650 +/- 14.637) 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 32 Photometric data point(s) available in NED. |
QUICK-LOOK ANGULAR & PHYSICAL DIAMETERS for NGC 2945 (Back to INDEX) The largest diameters in the Visual and Near-Infrared spectral regions, when available:
The quantities quoted above have not necessarily been corrected for foreground extinction. View details for 17 Diameter data point(s) available in NED. |