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Date and Time of the Query: 2019-07-21 T23:36:21 PDT
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Diameter data point(s) for object SDSS J143150.91+202556.0

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:
3.39 (a) arcsec 0.21 arcsec ... ... ... ... 51.7
[J2000]
25.0 mag arcsec^-2^ 4.77E+14 6.79 ... 0.06 0.94 0.99 86 52
[J2000]
2 r (SDSS Petrosian)
2007SDSS6.C...0000:
0.47 (a) arcsec ... ... ... 0.087 ... ... ... ... 4.77E+14 0.95 0.17 ... ... ... ... ...
3 r (SDSS deVaucouleurs)
2007SDSS6.C...0000:
0.1910 (a) arcsec ... ... 0.050 (b/a) 0.215 ... ... 63.3
[J2000]
... 4.77E+14 0.38 0.43 0.05 0.95 1.00 87 63
[J2000]
4 r (SDSS Exponential)
2007SDSS6.C...0000:
0.2000 (a) arcsec ... ... 0.050 (b/a) 0.164 ... ... 54.8
[J2000]
... 4.77E+14 0.40 0.33 0.05 0.95 1.00 87 55
[J2000]


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 2007SDSS6.C...0000:
Published Object Name         : SDSS J143150.91+202556.0      
Frequency Targeted            : r (SDSS Isophotal)            
Major Axis (2a)               : a = 3.39       arcsec               2a = 6.79 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : b =       0.21 arcsec               2b = 0.42 arcsec 
Uncertainty                   : ...                                 ...
Axis Ratio                    : ...                                 b/a = 0.06
Uncertainty                   : ...                                 ...
Ellipticity                   : ...                                 1 - b/a = 0.94
Uncertainty                   : ...                                 ...
Eccentricity                  : ...                                 [(a/b)2-1]/[(a/b)2+1] = 0.99
Uncertainty                   : ...                                 ...
Cos-1(b/a)                    : ...                                 86 deg
Position Angle [Equinox]      :   51.7 deg [J2000]                  52 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          : 217.9621295412  20.4322371788    (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 J143150.91+202556.0 Frequency Targeted : r (SDSS Petrosian) Major Axis (2a) : a = 0.47 arcsec 2a = 0.95 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 : 217.9621295412 20.4322371788 (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 J143150.91+202556.0 Frequency Targeted : r (SDSS deVaucouleurs) Major Axis (2a) : a = 0.1910 arcsec 2a = 0.38 arcsec Uncertainty : 0.215 arcsec 0.43 arcsec Minor Axis (2b) : ... 2b = 0.02 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.050 b/a = 0.05 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.95 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 1.00 Uncertainty : ... ... Cos-1(b/a) : ... 87 deg Position Angle [Equinox] : 63.3 deg [J2000] 63 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 : 217.9621295412 20.4322371788 (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 J143150.91+202556.0 Frequency Targeted : r (SDSS Exponential) Major Axis (2a) : a = 0.2000 arcsec 2a = 0.40 arcsec Uncertainty : 0.164 arcsec 0.33 arcsec Minor Axis (2b) : ... 2b = 0.02 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.050 b/a = 0.05 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.95 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 1.00 Uncertainty : ... ... Cos-1(b/a) : ... 87 deg Position Angle [Equinox] : 54.8 deg [J2000] 55 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 : 217.9621295412 20.4322371788 (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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