NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2022-01-26 T06:21:37 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 1644


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 1644                       04h37m40.1s -66d11m57s *Cl       ...       ...       ...     ...    16     0   31    6     0    4     0 Retrieve Retrieve 1   

Detailed information for each object


Object No. 1 - NGC 1644

INDEX for NGC 1644
Essential Data (jump to sub-section of this query report):

   Essential Note    
   Cross-IDs    
   Coordinates    
   Basic Data   
   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
   
31 Photometric data point(s) and SED   
Spectra   
Redshift-Independent Distances
16 Reference(s)   
6 Position data point(s)
4 Diameter data point(s)   

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)
Object Names Type Object Names Type
NGC 1644*Cl 2MASX J04374008-6611564 IrS
ESO 084-SC 030 *Cl 2MASS J04373968-6611584 IrS
2MASX J04373897-6611589 IrS 2MASS J04373980-6611564 IrS
2MASX J04373897-6611589 ID G GALEXASC J043739.94-661154.9 UvS

COORDINATES for NGC 1644 (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)   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    0
Additional 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.


NGC 1644 Distance Modulus
(mag)
Metric Distance
(Mpc)
Mean 18.50 0.050
Std. Dev. 0.02 0.000
Min. 18.48 0.050
Max. 18.51 0.050
Median 18.50 0.050

CLASSIFICATIONS (TYPES, ATTRIBUTES) for NGC 1644 (Back to INDEX)
TypeAs PublishedNED HomogenizedFlagReference Code
Distance IndicatorCMDCMD...2009A&A...497..755M
1 Detailed Classification(s)


FOREGROUND GALACTIC EXTINCTION for NGC 1644 (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]0.2080.1740.1320.1040.0720.2040.1590.1100.0820.0610.0340.0220.0150.007
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]0.2610.2070.1590.1280.0930.2480.1820.1320.1000.0710.0430.0280.0180.007


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
      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:
31 photometric data point(s)      4 Diameter data point(s)      

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).

Spectral
Region
Band Apparent Mag or Flux Refcode Absolute Mag or νLν [W] νLν [L(Bolometric)]
UltravioletNUV (GALEX) AB 16.4020 +/- 0.0175229 mag 2012GASC..C...0000S-2.10 +/- 0.02 [mag] 1.00E+03 +/- 1.62E+01
Near-InfraredJ 11.834 +/- 0.038 mag 20032MASX.C.......:-6.67 +/- 0.04 [mag] 5.49E+03 +/- 1.96E+02
NOTE: The above quantities are derived using an estimated Distance Modulus of (18.50 +/- 0.02) mag corresponding to
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:

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]
K_s (2MASS "total") 60.9049.94100 Diameter for "total" magnitude 20032MASX.C.......:20032MASX.C.......:0.010.01
NOTE: Physical diameters are derived using a scale of 0.0002 kpc/arcsec based on Average NED-D Metric Distance of (0.050 +/- 0.000) Mpc.
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)
Resources for Object NamesSite/Service
Query SIMBAD by primary NED object name -- NGC 1644SIMBAD (CDS, Strasbourg, France)
Revised New General Catalogue -- NGC 1644VizieR Catalog Query (U.S. mirror, CfA/Harvard)
ESO/Uppsala Survey -- ESO 084-SC 030 VizieR Catalog Query (U.S. mirror, CfA/Harvard)
2MASS Extended Source Images (JHKs) -- 2MASX J04373897-6611589 NASA/IPAC Infrared Science Archive (IRSA)
2MASS Extended Source Images (JHKs) -- 2MASX J04374008-6611564 NASA/IPAC Infrared Science Archive (IRSA)
Query GALEX (NUV/FUV) Mission Archive (7.2 arcsec search radius) -- NGC 1644GALEX Mission Data Archive at MAST
Explore IRSA resources with RADAR (10 arcsec search radius) -- NGC 1644NASA/IPAC Infrared Science Archive (IRSA)
Resources for position 04h37m40.1s, -66d11m57s (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)
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)
The NRAO Data Archive System

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