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Date and Time of the Query: 2022-01-23 T01:22:19 PST
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Diameter data point(s) for object SDSS J155006.47+382458.4

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:
1.91 (a) arcsec 0.77 arcsec ... ... ... ... 111.8
[J2000]
25.0 mag arcsec^-2^ 4.77E+14 3.82 ... 0.40 0.60 0.72 66 112
[J2000]
2 r (SDSS Petrosian)
2007SDSS6.C...0000:
0.75 (a) arcsec ... ... ... 0.146 ... ... ... ... 4.77E+14 1.50 0.29 ... ... ... ... ...
3 r (SDSS deVaucouleurs)
2007SDSS6.C...0000:
0.1808 (a) arcsec ... ... 0.458 (b/a) 0.264 ... ... 125.9
[J2000]
... 4.77E+14 0.36 0.53 0.46 0.54 0.65 63 126
[J2000]
4 r (SDSS Exponential)
2007SDSS6.C...0000:
0.2824 (a) arcsec ... ... 0.500 (b/a) 0.366 ... ... 124.7
[J2000]
... 4.77E+14 0.56 0.73 0.50 0.50 0.60 60 125
[J2000]


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 2007SDSS6.C...0000:
Published Object Name         : SDSS J155006.47+382458.4      
Frequency Targeted            : r (SDSS Isophotal)            
Major Axis (2a)               : a = 1.91       arcsec               2a = 3.82 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : b =       0.77 arcsec               2b = 1.54 arcsec 
Uncertainty                   : ...                                 ...
Axis Ratio                    : ...                                 b/a = 0.40
Uncertainty                   : ...                                 ...
Ellipticity                   : ...                                 1 - b/a = 0.60
Uncertainty                   : ...                                 ...
Eccentricity                  : ...                                 [(a/b)2-1]/[(a/b)2+1] = 0.72
Uncertainty                   : ...                                 ...
Cos-1(b/a)                    : ...                                 66 deg
Position Angle [Equinox]      :  111.8 deg [J2000]                  112 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          : 237.5269805941  38.4162451575    (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 J155006.47+382458.4 Frequency Targeted : r (SDSS Petrosian) Major Axis (2a) : a = 0.75 arcsec 2a = 1.50 arcsec Uncertainty : 0.146 arcsec 0.29 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 : 237.5269805941 38.4162451575 (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 J155006.47+382458.4 Frequency Targeted : r (SDSS deVaucouleurs) Major Axis (2a) : a = 0.1808 arcsec 2a = 0.36 arcsec Uncertainty : 0.264 arcsec 0.53 arcsec Minor Axis (2b) : ... 2b = 0.17 arcsec Uncertainty : ... 0.80 Axis Ratio : b/a = 0.458 b/a = 0.46 Uncertainty : 1.522 1.52 Ellipticity : ... 1 - b/a = 0.54 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.65 Uncertainty : ... ... Cos-1(b/a) : ... 63 deg Position Angle [Equinox] : 125.9 deg [J2000] 126 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 : 237.5269805941 38.4162451575 (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 J155006.47+382458.4 Frequency Targeted : r (SDSS Exponential) Major Axis (2a) : a = 0.2824 arcsec 2a = 0.56 arcsec Uncertainty : 0.366 arcsec 0.73 arcsec Minor Axis (2b) : ... 2b = 0.28 arcsec Uncertainty : ... 0.74 Axis Ratio : b/a = 0.500 b/a = 0.50 Uncertainty : 1.007 1.01 Ellipticity : ... 1 - b/a = 0.50 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.60 Uncertainty : ... ... Cos-1(b/a) : ... 60 deg Position Angle [Equinox] : 124.7 deg [J2000] 125 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 : 237.5269805941 38.4162451575 (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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