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Date and Time of the Query: 2019-08-21 T11:36:16 PDT
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Diameter data point(s) for object 2MASS J08211524+1945163

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 r (SDSS Isophotal)
2007SDSS6.C...0000:
2.84 (a) arcsec 2.35 arcsec ... ... ... ... 22.5
[J2000]
25.0 mag arcsec^-2^ 4.77E+14 5.67 ... 0.83 0.17 0.19 34 23
[J2000]
2 r (SDSS Petrosian)
2007SDSS6.C...0000:
0.42 (a) arcsec ... ... ... 0.004 ... ... ... ... 4.77E+14 0.85 0.01 ... ... ... ... ...
3 r (SDSS deVaucouleurs)
2007SDSS6.C...0000:
0.0089 (a) arcsec ... ... 0.300 (b/a) 0.184 ... ... 45.9
[J2000]
... 4.77E+14 0.02 0.37 0.30 0.70 0.83 73 46
[J2000]
4 r (SDSS Exponential)
2007SDSS6.C...0000:
0.0091 (a) arcsec ... ... 0.450 (b/a) 0.066 ... ... 45.9
[J2000]
... 4.77E+14 0.02 0.13 0.45 0.55 0.66 63 46
[J2000]


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 2007SDSS6.C...0000:
Published Object Name         : SDSS J082115.23+194516.6      
Frequency Targeted            : r (SDSS Isophotal)            
Major Axis (2a)               : a = 2.84       arcsec               2a = 5.67 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : b =       2.35 arcsec               2b = 4.69 arcsec 
Uncertainty                   : ...                                 ...
Axis Ratio                    : ...                                 b/a = 0.83
Uncertainty                   : ...                                 ...
Ellipticity                   : ...                                 1 - b/a = 0.17
Uncertainty                   : ...                                 ...
Eccentricity                  : ...                                 [(a/b)2-1]/[(a/b)2+1] = 0.19
Uncertainty                   : ...                                 ...
Cos-1(b/a)                    : ...                                 34 deg
Position Angle [Equinox]      :   22.5 deg [J2000]                  23 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          : 125.3134929241  19.7546111330    (J2000)
Qualifiers                    : From new, raw data; DIA_MAJ or DIA_MIN modified from
                               published data
NED Comment                   :                                         

No. 2 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J082115.23+194516.6 Frequency Targeted : r (SDSS Petrosian) Major Axis (2a) : a = 0.42 arcsec 2a = 0.85 arcsec Uncertainty : 0.004 arcsec 0.01 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 : 125.3134929241 19.7546111330 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment :
No. 3 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J082115.23+194516.6 Frequency Targeted : r (SDSS deVaucouleurs) Major Axis (2a) : a = 0.0089 arcsec 2a = 0.02 arcsec Uncertainty : 0.184 arcsec 0.37 arcsec Minor Axis (2b) : ... 2b = 0.01 arcsec Uncertainty : ... 3.46 Axis Ratio : b/a = 0.300 b/a = 0.30 Uncertainty : 9.414 9.41 Ellipticity : ... 1 - b/a = 0.70 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.83 Uncertainty : ... ... Cos-1(b/a) : ... 73 deg Position Angle [Equinox] : 45.9 deg [J2000] 46 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 : 125.3134929241 19.7546111330 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment : Effective (half-light) radius
No. 4 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J082115.23+194516.6 Frequency Targeted : r (SDSS Exponential) Major Axis (2a) : a = 0.0091 arcsec 2a = 0.02 arcsec Uncertainty : 0.066 arcsec 0.13 arcsec Minor Axis (2b) : ... 2b = 0.01 arcsec Uncertainty : ... 0.52 Axis Ratio : b/a = 0.450 b/a = 0.45 Uncertainty : 3.905 3.90 Ellipticity : ... 1 - b/a = 0.55 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.66 Uncertainty : ... ... Cos-1(b/a) : ... 63 deg Position Angle [Equinox] : 45.9 deg [J2000] 46 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 : 125.3134929241 19.7546111330 (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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