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Date and Time of the Query: 2022-01-23 T11:25:41 PST
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Diameter data point(s) for object SDSS J155005.50+382451.5

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:
1.64 (a) arcsec 0.99 arcsec ... ... ... ... 151.2
[J2000]
25.0 mag arcsec^-2^ 4.77E+14 3.27 ... 0.60 0.40 0.47 53 151
[J2000]
2 r (SDSS Petrosian)
2007SDSS6.C...0000:
0.72 (a) arcsec ... ... ... 0.130 ... ... ... ... 4.77E+14 1.44 0.26 ... ... ... ... ...
3 r (SDSS deVaucouleurs)
2007SDSS6.C...0000:
0.7485 (a) arcsec ... ... 0.050 (b/a) 0.790 ... ... 161.6
[J2000]
... 4.77E+14 1.50 1.58 0.05 0.95 1.00 87 162
[J2000]
4 r (SDSS Exponential)
2007SDSS6.C...0000:
0.5072 (a) arcsec ... ... 0.113 (b/a) 0.269 ... ... 159.9
[J2000]
... 4.77E+14 1.01 0.54 0.11 0.89 0.97 84 160
[J2000]


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 2007SDSS6.C...0000:
Published Object Name         : SDSS J155005.50+382451.5      
Frequency Targeted            : r (SDSS Isophotal)            
Major Axis (2a)               : a = 1.64       arcsec               2a = 3.27 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : b =       0.99 arcsec               2b = 1.98 arcsec 
Uncertainty                   : ...                                 ...
Axis Ratio                    : ...                                 b/a = 0.60
Uncertainty                   : ...                                 ...
Ellipticity                   : ...                                 1 - b/a = 0.40
Uncertainty                   : ...                                 ...
Eccentricity                  : ...                                 [(a/b)2-1]/[(a/b)2+1] = 0.47
Uncertainty                   : ...                                 ...
Cos-1(b/a)                    : ...                                 53 deg
Position Angle [Equinox]      :  151.2 deg [J2000]                  151 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          : 237.5229292921  38.4143082227    (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 J155005.50+382451.5 Frequency Targeted : r (SDSS Petrosian) Major Axis (2a) : a = 0.72 arcsec 2a = 1.44 arcsec Uncertainty : 0.130 arcsec 0.26 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 : 237.5229292921 38.4143082227 (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 J155005.50+382451.5 Frequency Targeted : r (SDSS deVaucouleurs) Major Axis (2a) : a = 0.7485 arcsec 2a = 1.50 arcsec Uncertainty : 0.790 arcsec 1.58 arcsec Minor Axis (2b) : ... 2b = 0.07 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] : 161.6 deg [J2000] 162 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 : 237.5229292921 38.4143082227 (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 J155005.50+382451.5 Frequency Targeted : r (SDSS Exponential) Major Axis (2a) : a = 0.5072 arcsec 2a = 1.01 arcsec Uncertainty : 0.269 arcsec 0.54 arcsec Minor Axis (2b) : ... 2b = 0.11 arcsec Uncertainty : ... 0.20 Axis Ratio : b/a = 0.113 b/a = 0.11 Uncertainty : 0.364 0.36 Ellipticity : ... 1 - b/a = 0.89 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.97 Uncertainty : ... ... Cos-1(b/a) : ... 84 deg Position Angle [Equinox] : 159.9 deg [J2000] 160 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 : 237.5229292921 38.4143082227 (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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