|INDEX for NGC 1644|
|Detailed Data (NED queries):|
ESSENTIAL NOTE for NGC 1644 (Back to INDEX)|
One 2MASS source is centered 7 arcsec southwest of the cluster core.
CROSS-IDENTIFICATIONS for NGC 1644 (Back to INDEX)|
COORDINATES for NGC 1644 (Back to INDEX)|
Reference Frame Longitude Latitude RA DEC Uncertainty Ellipse (arcsec) (degrees) (degrees) Semimajor Semiminor PA(deg) Equatorial (B1950.0) 69.368905 -66.297143 04h37m28.54s -66d17m49.7s 1.25E+00 1.25E+00 0 Equatorial (J2000.0) 69.417042 -66.199083 04h37m40.09s -66d11m56.7s 1.25E+00 1.25E+00 0 Ecliptic (B1950.0) 352.294241 -81.782401 1.25E+00 1.25E+00 0 Ecliptic (J2000.0) 353.038196 -81.782535 1.25E+00 1.25E+00 0 Galactic 277.647265 -37.961831 1.25E+00 1.25E+00 0 SuperGalactic 222.513329 -34.646478 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 1644 (Back to INDEX)|
3 Distances found in NED View 3 Individual Distance Measurement(s) for NGC 1644
Summary Statistics computed by NED from 3 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.
CLASSIFICATIONS (TYPES, ATTRIBUTES) for NGC 1644 (Back to INDEX)|
FOREGROUND GALACTIC EXTINCTION for NGC 1644 (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 = 0.080 mag
See Notes on Galactic Extinction for important caveats.
BASIC DATA for NGC 1644 (Back to INDEX)|
Description : LMC open cluster Magnitude and Filter : 12.1J Spare 3 : 0.51 Spare 4 : 0.45 NOTE: This information is indicative only. With the exception of the
QUICK-LOOK PHOTOMETRY and LUMINOSITIES for NGC 1644 (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 (0.050 +/- 0.000) 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 31 Photometric data point(s) available in NED.
QUICK-LOOK ANGULAR & PHYSICAL DIAMETERS for NGC 1644 (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 4 Diameter data point(s) available in NED.
EXTERNAL ARCHIVES AND SERVICES for NGC 1644 Help (Back to INDEX)|