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Date and Time of the Query: 2019-06-20 T12:18:43 PDT
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Diameter data point(s) for object IC 2784

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.......:
8.2 (a) arcsec ... ... 0.860 (b/a) ... ... ... 10
[J2000]
20.0 K-mag arcsec^-2^ 1.38E+14 16.40 ... 0.86 0.14 0.15 31 10
[J2000]
2 K_s (2MASS "total")
20032MASX.C.......:
20.1 (a) arcsec ... ... 0.860 (b/a) ... ... ... 10
[J2000]
Diameter for "total" magnitude 1.38E+14 40.10 ... 0.86 0.14 0.15 31 10
[J2000]
3 r (SDSS Isophotal)
2005SDSS4.C...0000:
16.49 (a) arcsec 10.46 arcsec ... ... ... ... 36.8
[J2000]
25.0 mag arcsec^-2^ 4.77E+14 32.98 ... 0.63 0.37 0.43 51 37
[J2000]
4 r (SDSS Petrosian)
2005SDSS4.C...0000:
3.22 (a) arcsec ... ... ... 0.08 ... ... ... ... 4.77E+14 6.44 0.16 ... ... ... ... ...
5 r (SDSS de Vaucouleurs)
2005SDSS4.C...0000:
1.73 (a) arcsec ... ... 0.727 (b/a) 0.02 ... ... 7.4
[J2000]
... 4.77E+14 3.46 0.03 0.73 0.27 0.31 43 7
[J2000]
6 r (SDSS Exponential)
2005SDSS4.C...0000:
1.14 (a) arcsec ... ... 0.679 (b/a) 0.01 ... ... 179.8
[J2000]
... 4.77E+14 2.28 0.01 0.68 0.32 0.37 47 180
[J2000]
7 r (SDSS Isophotal)
2007SDSS6.C...0000:
16.49 (a) arcsec 10.46 arcsec ... ... ... ... 36.8
[J2000]
25.0 mag arcsec^-2^ 4.77E+14 32.98 ... 0.63 0.37 0.43 51 37
[J2000]
8 r (SDSS Petrosian)
2007SDSS6.C...0000:
3.22 (a) arcsec ... ... ... 0.080 ... ... ... ... 4.77E+14 6.45 0.16 ... ... ... ... ...
9 r (SDSS deVaucouleurs)
2007SDSS6.C...0000:
1.7308 (a) arcsec ... ... 0.727 (b/a) 0.016 ... ... 7.4
[J2000]
... 4.77E+14 3.46 0.03 0.73 0.27 0.31 43 7
[J2000]
10 r (SDSS Exponential)
2007SDSS6.C...0000:
1.1402 (a) arcsec ... ... 0.679 (b/a) 0.005 ... ... 179.8
[J2000]
... 4.77E+14 2.28 0.01 0.68 0.32 0.37 47 180
[J2000]


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 20032MASX.C.......:
Published Object Name         : 2MASX J11231160+1307041       
Frequency Targeted            : K_s (2MASS isophotal)         
Major Axis (2a)               : a = 8.2        arcsec               2a = 16.40 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : ...                                 2b = 14.10 arcsec
Uncertainty                   : ...                                 ...
Axis Ratio                    : b/a = 0.860                         b/a = 0.86
Uncertainty                   : ...                                 ...
Ellipticity                   : ...                                 1 - b/a = 0.14
Uncertainty                   : ...                                 ...
Eccentricity                  : ...                                 [(a/b)2-1]/[(a/b)2+1] = 0.15
Uncertainty                   : ...                                 ...
Cos-1(b/a)                    : ...                                 31 deg
Position Angle [Equinox]      :   10   deg [J2000]                  10 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          : 170.798431      13.117755    (J2000)
Qualifiers                    : From new, raw data
NED Comment                   :                                         

No. 2 Published Units: Homogenized Units: Reference Code : 20032MASX.C.......: Published Object Name : 2MASX J11231160+1307041 Frequency Targeted : K_s (2MASS "total") Major Axis (2a) : a = 20.1 arcsec 2a = 40.10 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 34.49 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.860 b/a = 0.86 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.14 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.15 Uncertainty : ... ... Cos-1(b/a) : ... 31 deg Position Angle [Equinox] : 10 deg [J2000] 10 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 : 170.798431 13.117755 (J2000) Qualifiers : From new, raw data NED Comment :
No. 3 Published Units: Homogenized Units: Reference Code : 2005SDSS4.C...0000: Published Object Name : SDSS J112311.63+130703.8 Frequency Targeted : r (SDSS Isophotal) Major Axis (2a) : a = 16.49 arcsec 2a = 32.98 arcsec Uncertainty : ... ... Minor Axis (2b) : b = 10.46 arcsec 2b = 20.92 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.63 Uncertainty : ... ... 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] : 36.8 deg [J2000] 37 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 : 170.7984619 13.1177149 (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 : 2005SDSS4.C...0000: Published Object Name : SDSS J112311.63+130703.8 Frequency Targeted : r (SDSS Petrosian) Major Axis (2a) : a = 3.22 arcsec 2a = 6.44 arcsec Uncertainty : 0.08 arcsec 0.16 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 : 170.7984619 13.1177149 (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 : 2005SDSS4.C...0000: Published Object Name : SDSS J112311.63+130703.8 Frequency Targeted : r (SDSS de Vaucouleurs) Major Axis (2a) : a = 1.73 arcsec 2a = 3.46 arcsec Uncertainty : 0.02 arcsec 0.03 arcsec Minor Axis (2b) : ... 2b = 2.52 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.727 b/a = 0.73 Uncertainty : 0.007 0.01 Ellipticity : ... 1 - b/a = 0.27 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.31 Uncertainty : ... ... Cos-1(b/a) : ... 43 deg Position Angle [Equinox] : 7.4 deg [J2000] 7 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 : 170.7984619 13.1177149 (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 : 2005SDSS4.C...0000: Published Object Name : SDSS J112311.63+130703.8 Frequency Targeted : r (SDSS Exponential) Major Axis (2a) : a = 1.14 arcsec 2a = 2.28 arcsec Uncertainty : 0.01 arcsec 0.01 arcsec Minor Axis (2b) : ... 2b = 1.55 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.679 b/a = 0.68 Uncertainty : 0.005 0.01 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] : 179.8 deg [J2000] 180 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 : 170.7984619 13.1177149 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment : Effective (half-light) radius
No. 7 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J112311.63+130703.7 Frequency Targeted : r (SDSS Isophotal) Major Axis (2a) : a = 16.49 arcsec 2a = 32.98 arcsec Uncertainty : ... ... Minor Axis (2b) : b = 10.46 arcsec 2b = 20.92 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.63 Uncertainty : ... ... 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] : 36.8 deg [J2000] 37 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 : 170.7984619828 13.1177157926 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment :
No. 8 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J112311.63+130703.7 Frequency Targeted : r (SDSS Petrosian) Major Axis (2a) : a = 3.22 arcsec 2a = 6.45 arcsec Uncertainty : 0.080 arcsec 0.16 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 : 170.7984619828 13.1177157926 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment :
No. 9 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J112311.63+130703.7 Frequency Targeted : r (SDSS deVaucouleurs) Major Axis (2a) : a = 1.7308 arcsec 2a = 3.46 arcsec Uncertainty : 0.016 arcsec 0.03 arcsec Minor Axis (2b) : ... 2b = 2.52 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.727 b/a = 0.73 Uncertainty : 0.007 0.01 Ellipticity : ... 1 - b/a = 0.27 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.31 Uncertainty : ... ... Cos-1(b/a) : ... 43 deg Position Angle [Equinox] : 7.4 deg [J2000] 7 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 : 170.7984619828 13.1177157926 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment : Effective (half-light) radius
No. 10 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J112311.63+130703.7 Frequency Targeted : r (SDSS Exponential) Major Axis (2a) : a = 1.1402 arcsec 2a = 2.28 arcsec Uncertainty : 0.005 arcsec 0.01 arcsec Minor Axis (2b) : ... 2b = 1.55 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.679 b/a = 0.68 Uncertainty : 0.005 0.01 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] : 179.8 deg [J2000] 180 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 : 170.7984619828 13.1177157926 (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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