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Date and Time of the Query: 2019-06-26 T11:56:53 PDT
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Diameter data point(s) for object 3C 254

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 1407 MHz
1969MNRAS.145...31M
... ... ... ... ... ... ... ... 110
[B1950*]
... 1.41E+09 ... ... ... ... ... ... 110
[J2000]
2 r (SDSS Isophotal)
2005SDSS4.C...0000:
4.24 (a) arcsec 3.73 arcsec ... ... ... ... 151.9
[J2000]
25.0 mag arcsec^-2^ 4.77E+14 8.48 ... 0.88 0.12 0.13 28 152
[J2000]
3 r (SDSS Petrosian)
2005SDSS4.C...0000:
0.51 (a) arcsec ... ... ... 0.00 ... ... ... ... 4.77E+14 1.02 0.01 ... ... ... ... ...
4 r (SDSS de Vaucouleurs)
2005SDSS4.C...0000:
0.02 (a) arcsec ... ... 1.000 (b/a) 0.01 ... ... 59.8
[J2000]
... 4.77E+14 0.05 0.02 1.00 0.00 0.00 0 60
[J2000]
5 r (SDSS Exponential)
2005SDSS4.C...0000:
0.03 (a) arcsec ... ... 1.000 (b/a) 0.01 ... ... 59.3
[J2000]
... 4.77E+14 0.05 0.02 1.00 0.00 0.00 0 59
[J2000]
6 r (SDSS Isophotal)
2007SDSS6.C...0000:
4.24 (a) arcsec 3.73 arcsec ... ... ... ... 151.9
[J2000]
25.0 mag arcsec^-2^ 4.77E+14 8.48 ... 0.88 0.12 0.13 28 152
[J2000]
7 r (SDSS Petrosian)
2007SDSS6.C...0000:
0.51 (a) arcsec ... ... ... 0.003 ... ... ... ... 4.77E+14 1.02 0.01 ... ... ... ... ...
8 r (SDSS deVaucouleurs)
2007SDSS6.C...0000:
0.0241 (a) arcsec ... ... 1.000 (b/a) 0.012 ... ... 59.8
[J2000]
... 4.77E+14 0.05 0.02 1.00 0.00 0.00 0 60
[J2000]
9 r (SDSS Exponential)
2007SDSS6.C...0000:
0.0255 (a) arcsec ... ... 1.000 (b/a) 0.009 ... ... 59.3
[J2000]
... 4.77E+14 0.05 0.02 1.00 0.00 0.00 0 59
[J2000]


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 1969MNRAS.145...31M
Published Object Name         : 3C 254                        
Frequency Targeted            : 1407 MHz                      
Major Axis                    : ...                                   ...
Uncertainty                   : ...                                   ... 
Minor Axis (2b)               : ...                                 ...
Uncertainty                   : ...                                 ...
Axis Ratio                    : ...                                 ...
Uncertainty                   : ...                                 ...
Ellipticity                   : ...                                 ...
Uncertainty                   : ...                                 ...
Eccentricity                  : ...                                 ...
Uncertainty                   : ...                                 ...
Cos-1(b/a)                    : ...                                 ...
Position Angle [Equinox]      : 110    deg [B1950*]                 110 deg [J2000]
Uncertainty                   : ...                                 ...
Significance                  : No uncertainty reported
Diameter Reference Level      : ...
Frequency                     : 1407         MHz                    1.41E+09 Hz
Frequency Mode                : Broad-band detector (e.g. photographic plate)

Measurement Mode               
    Detector Type             : Maps (e.g., 2MASS, VLA, Sloan)
    Fitting Technique         : Eye estimate
    Measured Quantity         : See comments
Coordinates Targeted          :
Qualifiers                    : From new, raw data
*                             : No epoch or equinox published; the value given is assumed by NED
NED Comment                   : PA of the main radio axis               

No. 2 Published Units: Homogenized Units: Reference Code : 2005SDSS4.C...0000: Published Object Name : SDSS J111438.72+403720.3 Frequency Targeted : r (SDSS Isophotal) Major Axis (2a) : a = 4.24 arcsec 2a = 8.48 arcsec Uncertainty : ... ... Minor Axis (2b) : b = 3.73 arcsec 2b = 7.46 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.88 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.12 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.13 Uncertainty : ... ... Cos-1(b/a) : ... 28 deg Position Angle [Equinox] : 151.9 deg [J2000] 152 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 : 168.6613159 40.6223145 (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 : 2005SDSS4.C...0000: Published Object Name : SDSS J111438.72+403720.3 Frequency Targeted : r (SDSS Petrosian) Major Axis (2a) : a = 0.51 arcsec 2a = 1.02 arcsec Uncertainty : 0.00 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 : 168.6613159 40.6223145 (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 J111438.72+403720.3 Frequency Targeted : r (SDSS de Vaucouleurs) Major Axis (2a) : a = 0.02 arcsec 2a = 0.05 arcsec Uncertainty : 0.01 arcsec 0.02 arcsec Minor Axis (2b) : ... 2b = 0.05 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 1.000 b/a = 1.00 Uncertainty : 0.128 0.13 Ellipticity : ... 1 - b/a = 0.00 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.00 Uncertainty : ... ... Cos-1(b/a) : ... 0 deg Position Angle [Equinox] : 59.8 deg [J2000] 60 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 : 168.6613159 40.6223145 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment : Effective (half-light) radius
No. 5 Published Units: Homogenized Units: Reference Code : 2005SDSS4.C...0000: Published Object Name : SDSS J111438.72+403720.3 Frequency Targeted : r (SDSS Exponential) Major Axis (2a) : a = 0.03 arcsec 2a = 0.05 arcsec Uncertainty : 0.01 arcsec 0.02 arcsec Minor Axis (2b) : ... 2b = 0.05 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 1.000 b/a = 1.00 Uncertainty : 0.084 0.08 Ellipticity : ... 1 - b/a = 0.00 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.00 Uncertainty : ... ... Cos-1(b/a) : ... 0 deg Position Angle [Equinox] : 59.3 deg [J2000] 59 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 : 168.6613159 40.6223145 (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 : 2007SDSS6.C...0000: Published Object Name : SDSS J111438.71+403720.3 Frequency Targeted : r (SDSS Isophotal) Major Axis (2a) : a = 4.24 arcsec 2a = 8.48 arcsec Uncertainty : ... ... Minor Axis (2b) : b = 3.73 arcsec 2b = 7.46 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.88 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.12 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.13 Uncertainty : ... ... Cos-1(b/a) : ... 28 deg Position Angle [Equinox] : 151.9 deg [J2000] 152 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 : 168.6613262812 40.6223170621 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment :
No. 7 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J111438.71+403720.3 Frequency Targeted : r (SDSS Petrosian) Major Axis (2a) : a = 0.51 arcsec 2a = 1.02 arcsec Uncertainty : 0.003 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 : 168.6613262812 40.6223170621 (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 J111438.71+403720.3 Frequency Targeted : r (SDSS deVaucouleurs) Major Axis (2a) : a = 0.0241 arcsec 2a = 0.05 arcsec Uncertainty : 0.012 arcsec 0.02 arcsec Minor Axis (2b) : ... 2b = 0.05 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 1.000 b/a = 1.00 Uncertainty : 0.128 0.13 Ellipticity : ... 1 - b/a = 0.00 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.00 Uncertainty : ... ... Cos-1(b/a) : ... 0 deg Position Angle [Equinox] : 59.8 deg [J2000] 60 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 : 168.6613262812 40.6223170621 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment : Effective (half-light) radius
No. 9 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J111438.71+403720.3 Frequency Targeted : r (SDSS Exponential) Major Axis (2a) : a = 0.0255 arcsec 2a = 0.05 arcsec Uncertainty : 0.009 arcsec 0.02 arcsec Minor Axis (2b) : ... 2b = 0.05 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 1.000 b/a = 1.00 Uncertainty : 0.084 0.08 Ellipticity : ... 1 - b/a = 0.00 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.00 Uncertainty : ... ... Cos-1(b/a) : ... 0 deg Position Angle [Equinox] : 59.3 deg [J2000] 59 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 : 168.6613262812 40.6223170621 (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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