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Date and Time of the Query: 2019-05-26 T07:58:36 PDT
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Diameter data point(s) for object NGC 2637

Diameter Data --- Published and Homogenized (arcsec) Units

  Published UnitsHomogenized Units
No.Observed Passband
REFCODE
Major Axis
(2a)
Major Axis UnitsMinor Axis
(2b)
Minor Axis UnitsAxis Ratio (b/a)Major Axis Unc.Ellipticity
(1 - b/a)
Eccentricity
[(a/b)2-1]/
[(a/b)2+1]
Position Angle
(deg)
[published]
Reference LevelFrequency (Hz)Major Axis
(2a)
(arcsec)
Major Axis Unc.Axis Ratio (b/a)Ellipticity
(1 - b/a)
Eccentricity
[(a/b)2-1]/
[(a/b)2+1]
cos-1(b/a)
(deg)
Position Angle
(deg)
[J2000]
1 K_s (2MASS isophotal)
20032MASX.C.......:
12.6 (a) arcsec ... ... 0.520 (b/a) ... ... ... 50
[J2000]
20.0 K-mag arcsec^-2^ 1.38E+14 25.20 ... 0.52 0.48 0.57 59 50
[J2000]
2 K_s (2MASS "total")
20032MASX.C.......:
23.0 (a) arcsec ... ... 0.520 (b/a) ... ... ... 50
[J2000]
Diameter for "total" magnitude 1.38E+14 46.00 ... 0.52 0.48 0.57 59 50
[J2000]
3 r (SDSS Isophotal)
2007SDSS6.C...0000:
21.00 (a) arcsec 14.20 arcsec ... ... ... ... 33.4
[J2000]
25.0 mag arcsec^-2^ 4.77E+14 42.00 ... 0.68 0.32 0.37 47 33
[J2000]
4 r (SDSS Petrosian)
2007SDSS6.C...0000:
5.76 (a) arcsec ... ... ... 0.087 ... ... ... ... 4.77E+14 11.52 0.17 ... ... ... ... ...
5 r (SDSS deVaucouleurs)
2007SDSS6.C...0000:
8.1824 (a) arcsec ... ... 0.634 (b/a) 0.085 ... ... 40.7
[J2000]
... 4.77E+14 16.36 0.17 0.63 0.37 0.43 51 41
[J2000]
6 r (SDSS Exponential)
2007SDSS6.C...0000:
3.1172 (a) arcsec ... ... 0.667 (b/a) 0.021 ... ... 43.1
[J2000]
... 4.77E+14 6.23 0.04 0.67 0.33 0.38 48 43
[J2000]


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 20032MASX.C.......:
Published Object Name         : 2MASX J08411343+1941281       
Frequency Targeted            : K_s (2MASS isophotal)         
Major Axis (2a)               : a = 12.6       arcsec               2a = 25.20 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : ...                                 2b = 13.10 arcsec
Uncertainty                   : ...                                 ...
Axis Ratio                    : b/a = 0.520                         b/a = 0.52
Uncertainty                   : ...                                 ...
Ellipticity                   : ...                                 1 - b/a = 0.48
Uncertainty                   : ...                                 ...
Eccentricity                  : ...                                 [(a/b)2-1]/[(a/b)2+1] = 0.57
Uncertainty                   : ...                                 ...
Cos-1(b/a)                    : ...                                 59 deg
Position Angle [Equinox]      :   50   deg [J2000]                  50 deg [J2000]
Uncertainty                   : ...                                 ...
Significance                  : No uncertainty reported
Diameter Reference Level      : 20.0 K-mag arcsec^-2^         
Frequency                     : 2.17         microns                1.38E+14 Hz
Frequency Mode                : Broad-band detector (e.g. photographic plate)

Measurement Mode               
    Detector Type             : Maps (e.g., 2MASS, VLA, Sloan)
    Fitting Technique         : Ellipse fitting to image
    Measured Quantity         : Isophotal diameter
    Qualifiers                : A radius is given in DIA_MAJ, not a diameter
Coordinates Targeted          : 130.306015      19.691183    (J2000)
Qualifiers                    : From new, raw data
NED Comment                   :                                         

No. 2 Published Units: Homogenized Units: Reference Code : 20032MASX.C.......: Published Object Name : 2MASX J08411343+1941281 Frequency Targeted : K_s (2MASS "total") Major Axis (2a) : a = 23.0 arcsec 2a = 46.00 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 23.92 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.520 b/a = 0.52 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.48 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.57 Uncertainty : ... ... Cos-1(b/a) : ... 59 deg Position Angle [Equinox] : 50 deg [J2000] 50 deg [J2000] Uncertainty : ... ... Significance : No uncertainty reported Diameter Reference Level : Diameter for "total" magnitude Frequency : 2.17 microns 1.38E+14 Hz Frequency Mode : Broad-band detector (e.g. photographic plate) Measurement Mode Detector Type : Maps (e.g., 2MASS, VLA, Sloan) Fitting Technique : Ellipse fitting to image Measured Quantity : Isophotal diameter Qualifiers : A radius is given in DIA_MAJ, not a diameter Coordinates Targeted : 130.306015 19.691183 (J2000) Qualifiers : From new, raw data NED Comment :
No. 3 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J084113.49+194129.1 Frequency Targeted : r (SDSS Isophotal) Major Axis (2a) : a = 21.00 arcsec 2a = 42.00 arcsec Uncertainty : ... ... Minor Axis (2b) : b = 14.20 arcsec 2b = 28.40 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.68 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.32 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.37 Uncertainty : ... ... Cos-1(b/a) : ... 47 deg Position Angle [Equinox] : 33.4 deg [J2000] 33 deg [J2000] Uncertainty : ... ... Significance : No uncertainty reported Diameter Reference Level : 25.0 mag arcsec^-2^ Frequency : 6290 A 4.77E+14 Hz Frequency Mode : Broad-band detector (e.g. photographic plate) Measurement Mode Detector Type : Maps (e.g., 2MASS, VLA, Sloan) Fitting Technique : Ellipse fitting to image Measured Quantity : Isophotal diameter Qualifiers : A radius is given in DIA_MAJ, not a diameter Coordinates Targeted : 130.3062097806 19.6914353740 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment :
No. 4 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J084113.49+194129.1 Frequency Targeted : r (SDSS Petrosian) Major Axis (2a) : a = 5.76 arcsec 2a = 11.52 arcsec Uncertainty : 0.087 arcsec 0.17 arcsec Minor Axis (2b) : ... ... Uncertainty : ... ... Axis Ratio : ... ... Uncertainty : ... ... Ellipticity : ... ... Uncertainty : ... ... Eccentricity : ... ... Uncertainty : ... ... Cos-1(b/a) : ... ... Position Angle [Equinox] : ... ... Uncertainty : ... ... Significance : Based on count statistics only Diameter Reference Level : ... Frequency : 6290 A 4.77E+14 Hz Frequency Mode : Broad-band detector (e.g. photographic plate) Measurement Mode Detector Type : Maps (e.g., 2MASS, VLA, Sloan) Fitting Technique : Profile fitting to image Measured Quantity : See comments Qualifiers : A radius is given in DIA_MAJ, not a diameter Coordinates Targeted : 130.3062097806 19.6914353740 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment :
No. 5 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J084113.49+194129.1 Frequency Targeted : r (SDSS deVaucouleurs) Major Axis (2a) : a = 8.1824 arcsec 2a = 16.36 arcsec Uncertainty : 0.085 arcsec 0.17 arcsec Minor Axis (2b) : ... 2b = 10.38 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.634 b/a = 0.63 Uncertainty : 0.007 0.01 Ellipticity : ... 1 - b/a = 0.37 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.43 Uncertainty : ... ... Cos-1(b/a) : ... 51 deg Position Angle [Equinox] : 40.7 deg [J2000] 41 deg [J2000] Uncertainty : ... ... Significance : Based on count statistics only Diameter Reference Level : ... Frequency : 6290 A 4.77E+14 Hz Frequency Mode : Broad-band detector (e.g. photographic plate) Measurement Mode Detector Type : Maps (e.g., 2MASS, VLA, Sloan) Fitting Technique : Ellipse fitting to image Measured Quantity : Half-light ("effective") diameter Qualifiers : A radius is given in DIA_MAJ, not a diameter Coordinates Targeted : 130.3062097806 19.6914353740 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment : Effective (half-light) radius
No. 6 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J084113.49+194129.1 Frequency Targeted : r (SDSS Exponential) Major Axis (2a) : a = 3.1172 arcsec 2a = 6.23 arcsec Uncertainty : 0.021 arcsec 0.04 arcsec Minor Axis (2b) : ... 2b = 4.16 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.667 b/a = 0.67 Uncertainty : 0.005 0.01 Ellipticity : ... 1 - b/a = 0.33 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.38 Uncertainty : ... ... Cos-1(b/a) : ... 48 deg Position Angle [Equinox] : 43.1 deg [J2000] 43 deg [J2000] Uncertainty : ... ... Significance : Based on count statistics only Diameter Reference Level : ... Frequency : 6290 A 4.77E+14 Hz Frequency Mode : Broad-band detector (e.g. photographic plate) Measurement Mode Detector Type : Maps (e.g., 2MASS, VLA, Sloan) Fitting Technique : Ellipse fitting to image Measured Quantity : Half-light ("effective") diameter Qualifiers : A radius is given in DIA_MAJ, not a diameter Coordinates Targeted : 130.3062097806 19.6914353740 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment : Effective (half-light) radius

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