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 2646 08h50m22.0s +73d27m47s G 3680 0.012275 13.09 ... 64 6 28 9 4 6 0 Retrieve Retrieve 1 |
INDEX for NGC 2646 | ||||||
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Detailed Data (NED queries):
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ESSENTIAL NOTE for NGC 2646 (Back to INDEX)N/A |
CROSS-IDENTIFICATIONS for NGC 2646 (Back to INDEX)
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COORDINATES for NGC 2646 (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) 131.249601 73.649048 08h44m59.90s +73d38m56.6s 1.25E+00 1.25E+00 0 Equatorial (J2000.0) 132.591875 73.463083 08h50m22.05s +73d27m47.1s 1.25E+00 1.25E+00 0 Ecliptic (B1950.0) 107.862465 52.760814 1.25E+00 1.25E+00 0 Ecliptic (J2000.0) 108.564231 52.766820 1.25E+00 1.25E+00 0 Galactic 140.329584 34.246742 1.25E+00 1.25E+00 0 SuperGalactic 34.342845 1.118986 1.25E+00 1.25E+00 0Additional detailed measurements with references are also available by clicking below: 9 Position data point(s) |
REDSHIFT-INDEPENDENT DISTANCES for NGC 2646 (Back to INDEX) 9 Distances found in NED View 9 Individual Distance Measurement(s) for NGC 2646 Summary Statistics computed by NED from 9 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 2646 (Back to INDEX)
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FOREGROUND GALACTIC EXTINCTION for NGC 2646 (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 = 0.040 mag See Notes on Galactic Extinction for important caveats. |
BASIC DATA for NGC 2646 (Back to INDEX)Helio. Radial Velocity : 3680 +/- 27 km/s Redshift : 0.012275 +/- 0.000090 1991RC3.9.C...0000d Major Diameter (arcmin) : 1.3 Minor Diameter (arcmin) : 1.3 Magnitude and Filter : 13.09 Classifications : SB(r)0^0^: NOTE: This information is indicative only. With the exception of the |
QUANTITIES DERIVED FROM REDSHIFT for NGC 2646 (Details)(Back to INDEX)Calculated and Corrected Velocities V (Heliocentric) : 3680 +/- 27 km/s 1991RC3.9.C...0000d V (Kinematic LSR) : 3686 +/- 27 km/s 1986MNRAS.221.1023K V (Galactocentric GSR) : 3801 +/- 27 km/s 1991RC3.9.C...0000d V (Local Group) : 3844 +/- 29 km/s 1996AJ....111..794K V (3K CMB) : 3722 +/- 27 km/s 1996ApJ...473..576F V (Virgo Infall only) : 3969 +/- 30 km/s 2000ApJ...529..786M V (Virgo + GA only) : 3938 +/- 30 km/s 2000ApJ...529..786M V (Virgo + GA + Shapley) : 3948 +/- 30 km/s 2000ApJ...529..786M Hubble Flow Distance and Distance Modulus (where Ho = 73.0 +/- 5 km/sec/Mpc) D (Galactocentric GSR) : 52.1 +/- 3.7 Mpc (m-M) = 33.58 +/- 0.15 mag D (Local Group) : 52.7 +/- 3.7 Mpc (m-M) = 33.61 +/- 0.15 mag D (3K CMB) : 51.0 +/- 3.6 Mpc (m-M) = 33.54 +/- 0.15 mag D (Virgo Infall only) : 54.4 +/- 3.8 Mpc (m-M) = 33.68 +/- 0.15 mag D (Virgo + GA only) : 53.9 +/- 3.8 Mpc (m-M) = 33.66 +/- 0.15 mag D (Virgo + GA + Shapley) : 54.1 +/- 3.8 Mpc (m-M) = 33.67 +/- 0.15 mag Scale at Hubble Flow Distances Scale (Galactocentric GSR) : 252 pc/arcsec = 0.252 kpc/arcsec = 15.14 kpc/arcmin = 0.91 Mpc/degree Scale (Local Group) : 255 pc/arcsec = 0.255 kpc/arcsec = 15.32 kpc/arcmin = 0.92 Mpc/degree Scale (3K CMB) : 247 pc/arcsec = 0.247 kpc/arcsec = 14.83 kpc/arcmin = 0.89 Mpc/degree Scale (Virgo Infall only) : 264 pc/arcsec = 0.264 kpc/arcsec = 15.81 kpc/arcmin = 0.95 Mpc/degree Scale (Virgo + GA only) : 262 pc/arcsec = 0.262 kpc/arcsec = 15.69 kpc/arcmin = 0.94 Mpc/degree Scale(Virgo + GA + Shapley): 262 pc/arcsec = 0.262 kpc/arcsec = 15.73 kpc/arcmin = 0.94 Mpc/degree |
QUICK-LOOK PHOTOMETRY and LUMINOSITIES for NGC 2646 (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 (46.300 +/- 18.026) 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 28 Photometric data point(s) available in NED. |
QUICK-LOOK ANGULAR & PHYSICAL DIAMETERS for NGC 2646 (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 6 Diameter data point(s) available in NED. |