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Date and Time of the Query: 2019-06-25 T23:25:30 PDT
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Diameter data point(s) for object NGC 2558

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 POSS1 103a-O
1973UGC...C...0000N
2.20 arcmin 1.70 arcmin ... ... ... ... 160
[B1950]
About 25.0 B-mag arcsec^-2^ 7.40E+14 132.00 ... 0.77 0.23 0.25 39 160
[J2000]
2 K_s (2MASS isophotal)
20032MASX.C.......:
28.1 (a) arcsec ... ... 0.660 (b/a) ... ... ... -10
[J2000]
20.0 K-mag arcsec^-2^ 1.38E+14 56.20 ... 0.66 0.34 0.39 49 170
[J2000]
3 K_s (2MASS "total")
20032MASX.C.......:
44.7 (a) arcsec ... ... 0.660 (b/a) ... ... ... -10
[J2000]
Diameter for "total" magnitude 1.38E+14 89.40 ... 0.66 0.34 0.39 49 170
[J2000]
4 POSS1 103a-O
1964MCG2..C...0000V
0.30 arcmin 0.20 arcmin ... ... ... ... ... Very high surface brightness 7.40E+14 18.00 ... 0.67 0.33 0.38 48 ...
5 POSS1 103a-O
1964MCG2..C...0000V
1.20 arcmin 0.90 arcmin ... ... ... ... ... Moderate surface brightness 7.40E+14 72.00 ... 0.75 0.25 0.28 41 ...
6 RC3 D_25, R_25 (blue)
1991RC3.9.C...0000d
1.24 log(2a) + 1 ... ... 0.11
log(a/b)
0.05 ... ... 160
[J2000]
25.0 B-mag arcsec^-2^ 6.81E+14 104.30 12.70 0.78 0.22 0.25 39 160
[J2000]
7 RC3 A_e (Johnson B)
1991RC3.9.C...0000d
0.80 log(2a) + 1 ... ... ... 0.03 ... ... ... ... 6.81E+14 37.90 2.70 ... ... ... ... ...
8 RC3 D_0 (blue)
1991RC3.9.C...0000d
1.26 log(2a) + 1 ... ... ... ... ... ... ... 25.0 B-mag arcsec^-2^ 6.81E+14 109.20 ... ... ... ... ... ...
9 r (SDSS Isophotal)
2006SDSS5.C...0000:
52.47 (a) arcsec 33.07 arcsec ... ... ... ... 159.4
[J2000]
25.0 mag arcsec^-2^ 4.77E+14 104.93 ... 0.63 0.37 0.43 51 159
[J2000]
10 r (SDSS Petrosian)
2006SDSS5.C...0000:
13.70 (a) arcsec ... ... ... 0.35 ... ... ... ... 4.77E+14 27.40 0.70 ... ... ... ... ...
11 r (SDSS de Vaucouleurs)
2006SDSS5.C...0000:
4.85 (a) arcsec ... ... 0.621 (b/a) 0.03 ... ... 161.1
[J2000]
... 4.77E+14 9.70 0.06 0.62 0.38 0.44 52 161
[J2000]
12 r (SDSS Exponential)
2006SDSS5.C...0000:
4.52 (a) arcsec ... ... 0.580 (b/a) 0.02 ... ... 161.2
[J2000]
... 4.77E+14 9.05 0.04 0.58 0.42 0.50 55 161
[J2000]
13 r (SDSS Isophotal)
2007SDSS6.C...0000:
52.47 (a) arcsec 33.07 arcsec ... ... ... ... 159.4
[J2000]
25.0 mag arcsec^-2^ 4.77E+14 104.93 ... 0.63 0.37 0.43 51 159
[J2000]
14 r (SDSS Petrosian)
2007SDSS6.C...0000:
13.70 (a) arcsec ... ... ... 0.348 ... ... ... ... 4.77E+14 27.40 0.70 ... ... ... ... ...
15 r (SDSS deVaucouleurs)
2007SDSS6.C...0000:
4.8517 (a) arcsec ... ... 0.621 (b/a) 0.032 ... ... 161.1
[J2000]
... 4.77E+14 9.70 0.06 0.62 0.38 0.44 52 161
[J2000]
16 r (SDSS Exponential)
2007SDSS6.C...0000:
4.5239 (a) arcsec ... ... 0.580 (b/a) 0.019 ... ... 161.2
[J2000]
... 4.77E+14 9.05 0.04 0.58 0.42 0.50 55 161
[J2000]


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 1973UGC...C...0000N
Published Object Name         : UGC 04331                     
Frequency Targeted            : POSS1 103a-O                  
Major Axis (2a)               : 2.20       arcmin                   2a = 132.00 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : 2b =  1.70      arcmin              2b = 102.00 arcsec 
Uncertainty                   : ...                                 ...
Axis Ratio                    : ...                                 b/a = 0.77
Uncertainty                   : ...                                 ...
Ellipticity                   : ...                                 1 - b/a = 0.23
Uncertainty                   : ...                                 ...
Eccentricity                  : ...                                 [(a/b)2-1]/[(a/b)2+1] = 0.25
Uncertainty                   : ...                                 ...
Cos-1(b/a)                    : ...                                 39 deg
Position Angle [Equinox]      : 160    deg [B1950]                  160 deg [J2000]
Uncertainty                   : ...                                 ...
Significance                  : No uncertainty reported
Diameter Reference Level      : About 25.0 B-mag arcsec^-2^   
Frequency                     : 4050         A                      7.40E+14 Hz
Frequency Mode                : Broad-band detector (e.g. photographic plate)

Measurement Mode               
    Detector Type             : Photographic plate, print, or film
    Fitting Technique         : Eye estimate
    Measured Quantity         : "Outer" diameter
Coordinates Targeted          : 081624.         +204000.    (B1950)
Qualifiers                    : From new, raw data
NED Comment                   :                                         

No. 2 Published Units: Homogenized Units: Reference Code : 20032MASX.C.......: Published Object Name : 2MASX J08191278+2030385 Frequency Targeted : K_s (2MASS isophotal) Major Axis (2a) : a = 28.1 arcsec 2a = 56.20 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 37.09 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.660 b/a = 0.66 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.34 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.39 Uncertainty : ... ... Cos-1(b/a) : ... 49 deg Position Angle [Equinox] : -10 deg [J2000] 170 deg [J2000] Uncertainty : ... ... Significance : No uncertainty reported Diameter Reference Level : 20.0 K-mag arcsec^-2^ Frequency : 2.17 microns 1.38E+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 : 124.803215 20.510715 (J2000) Qualifiers : From new, raw data NED Comment :
No. 3 Published Units: Homogenized Units: Reference Code : 20032MASX.C.......: Published Object Name : 2MASX J08191278+2030385 Frequency Targeted : K_s (2MASS "total") Major Axis (2a) : a = 44.7 arcsec 2a = 89.40 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 59.00 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.660 b/a = 0.66 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.34 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.39 Uncertainty : ... ... Cos-1(b/a) : ... 49 deg Position Angle [Equinox] : -10 deg [J2000] 170 deg [J2000] Uncertainty : ... ... Significance : No uncertainty reported Diameter Reference Level : Diameter for "total" magnitude Frequency : 2.17 microns 1.38E+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 : 124.803215 20.510715 (J2000) Qualifiers : From new, raw data NED Comment :
No. 4 Published Units: Homogenized Units: Reference Code : 1964MCG2..C...0000V Published Object Name : MCG +04-20-022 Frequency Targeted : POSS1 103a-O Major Axis (2a) : 0.30 arcmin 2a = 18.00 arcsec Uncertainty : ... ... Minor Axis (2b) : 2b = 0.20 arcmin 2b = 12.00 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.67 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.33 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.38 Uncertainty : ... ... Cos-1(b/a) : ... 48 deg Position Angle [Equinox] : ... ... Uncertainty : ... ... Significance : No uncertainty reported Diameter Reference Level : Very high surface brightness Frequency : 4050 A 7.40E+14 Hz Frequency Mode : Broad-band detector (e.g. photographic plate) Measurement Mode Detector Type : Photographic plate, print, or film Fitting Technique : Eye estimate Measured Quantity : "Inner" diameter Coordinates Targeted : 081618 +2039 (B1950) Qualifiers : From new, raw data NED Comment :
No. 5 Published Units: Homogenized Units: Reference Code : 1964MCG2..C...0000V Published Object Name : MCG +04-20-022 Frequency Targeted : POSS1 103a-O Major Axis (2a) : 1.20 arcmin 2a = 72.00 arcsec Uncertainty : ... ... Minor Axis (2b) : 2b = 0.90 arcmin 2b = 54.00 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.75 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.25 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.28 Uncertainty : ... ... Cos-1(b/a) : ... 41 deg Position Angle [Equinox] : ... ... Uncertainty : ... ... Significance : No uncertainty reported Diameter Reference Level : Moderate surface brightness Frequency : 4050 A 7.40E+14 Hz Frequency Mode : Broad-band detector (e.g. photographic plate) Measurement Mode Detector Type : Photographic plate, print, or film Fitting Technique : Eye estimate Measured Quantity : "Outer" diameter Coordinates Targeted : 081618 +2039 (B1950) Qualifiers : From new, raw data NED Comment :
No. 6 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : UGC 04331 Frequency Targeted : RC3 D_25, R_25 (blue) Major Axis (2a) : log(2a) + 1 = 1.24 2a = 104.30 arcsec Uncertainty : 0.05 12.70 arcsec Minor Axis (2b) : ... 2b = 80.94 arcsec Uncertainty : ... ... Axis Ratio : log(a/b) = 0.11 b/a = 0.78 Uncertainty : 0.05 0.10 Ellipticity : ... 1 - b/a = 0.22 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.25 Uncertainty : ... ... Cos-1(b/a) : ... 39 deg Position Angle [Equinox] : 160 deg [J2000] 160 deg [J2000] Uncertainty : ... ... Significance : Mean error Diameter Reference Level : 25.0 B-mag arcsec^-2^ Frequency : 4400 A 6.81E+14 Hz Frequency Mode : Broad-band detector (e.g. photographic plate) Measurement Mode Detector Type : Photographic plate, print, or film Fitting Technique : Eye estimate Measured Quantity : Isophotal diameter Coordinates Targeted : 081918.0 +203000. (J2000) Qualifiers : Homogenized from previously published data NED Comment :
No. 7 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : UGC 04331 Frequency Targeted : RC3 A_e (Johnson B) Major Axis (2a) : log(2a) + 1 = 0.80 2a = 37.90 arcsec Uncertainty : 0.03 2.70 arcsec Minor Axis (2b) : ... ... Uncertainty : ... ... Axis Ratio : ... ... Uncertainty : ... ... Ellipticity : ... ... Uncertainty : ... ... Eccentricity : ... ... Uncertainty : ... ... Cos-1(b/a) : ... ... Position Angle [Equinox] : ... ... Uncertainty : ... ... Significance : Mean error Diameter Reference Level : ... Frequency : 4400 A 6.81E+14 Hz Frequency Mode : Broad-band detector (e.g. photographic plate) Measurement Mode Detector Type : Photographic plate, print, or film Fitting Technique : Eye estimate Measured Quantity : Isophotal diameter Coordinates Targeted : 081918.0 +203000. (J2000) Qualifiers : From new, raw data NED Comment : From magnitude-aperture curves.
No. 8 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : UGC 04331 Frequency Targeted : RC3 D_0 (blue) Major Axis (2a) : log(2a) + 1 = 1.26 2a = 109.20 arcsec Uncertainty : ... ... Minor Axis (2b) : ... ... Uncertainty : ... ... Axis Ratio : ... ... Uncertainty : ... ... Ellipticity : ... ... Uncertainty : ... ... Eccentricity : ... ... Uncertainty : ... ... Cos-1(b/a) : ... ... Position Angle [Equinox] : ... ... Uncertainty : ... ... Significance : No uncertainty reported Diameter Reference Level : 25.0 B-mag arcsec^-2^ Frequency : 4400 A 6.81E+14 Hz Frequency Mode : Broad-band detector (e.g. photographic plate) Measurement Mode Detector Type : Photographic plate, print, or film Fitting Technique : Eye estimate Measured Quantity : Isophotal diameter Coordinates Targeted : 081918.0 +203000. (J2000) Qualifiers : Homogenized from previously published data NED Comment : Extinction and inclination corrected.
No. 9 Published Units: Homogenized Units: Reference Code : 2006SDSS5.C...0000: Published Object Name : SDSS J081912.76+203038.7 Frequency Targeted : r (SDSS Isophotal) Major Axis (2a) : a = 52.47 arcsec 2a = 104.93 arcsec Uncertainty : ... ... Minor Axis (2b) : b = 33.07 arcsec 2b = 66.13 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.63 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.37 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.43 Uncertainty : ... ... Cos-1(b/a) : ... 51 deg Position Angle [Equinox] : 159.4 deg [J2000] 159 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 : 124.8031769 20.5107403 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment :
No. 10 Published Units: Homogenized Units: Reference Code : 2006SDSS5.C...0000: Published Object Name : SDSS J081912.76+203038.7 Frequency Targeted : r (SDSS Petrosian) Major Axis (2a) : a = 13.70 arcsec 2a = 27.40 arcsec Uncertainty : 0.35 arcsec 0.70 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 : 124.8031769 20.5107403 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment :
No. 11 Published Units: Homogenized Units: Reference Code : 2006SDSS5.C...0000: Published Object Name : SDSS J081912.76+203038.7 Frequency Targeted : r (SDSS de Vaucouleurs) Major Axis (2a) : a = 4.85 arcsec 2a = 9.70 arcsec Uncertainty : 0.03 arcsec 0.06 arcsec Minor Axis (2b) : ... 2b = 6.02 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.621 b/a = 0.62 Uncertainty : 0.003 0.00 Ellipticity : ... 1 - b/a = 0.38 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.44 Uncertainty : ... ... Cos-1(b/a) : ... 52 deg Position Angle [Equinox] : 161.1 deg [J2000] 161 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 : 124.8031769 20.5107403 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment : Effective (half-light) radius
No. 12 Published Units: Homogenized Units: Reference Code : 2006SDSS5.C...0000: Published Object Name : SDSS J081912.76+203038.7 Frequency Targeted : r (SDSS Exponential) Major Axis (2a) : a = 4.52 arcsec 2a = 9.05 arcsec Uncertainty : 0.02 arcsec 0.04 arcsec Minor Axis (2b) : ... 2b = 5.25 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.580 b/a = 0.58 Uncertainty : 0.003 0.00 Ellipticity : ... 1 - b/a = 0.42 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.50 Uncertainty : ... ... Cos-1(b/a) : ... 55 deg Position Angle [Equinox] : 161.2 deg [J2000] 161 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 : 124.8031769 20.5107403 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment : Effective (half-light) radius
No. 13 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J081912.76+203038.6 Frequency Targeted : r (SDSS Isophotal) Major Axis (2a) : a = 52.47 arcsec 2a = 104.93 arcsec Uncertainty : ... ... Minor Axis (2b) : b = 33.07 arcsec 2b = 66.14 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.63 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.37 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.43 Uncertainty : ... ... Cos-1(b/a) : ... 51 deg Position Angle [Equinox] : 159.4 deg [J2000] 159 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 : 124.8031708204 20.5107391379 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment :
No. 14 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J081912.76+203038.6 Frequency Targeted : r (SDSS Petrosian) Major Axis (2a) : a = 13.70 arcsec 2a = 27.40 arcsec Uncertainty : 0.348 arcsec 0.70 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 : 124.8031708204 20.5107391379 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment :
No. 15 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J081912.76+203038.6 Frequency Targeted : r (SDSS deVaucouleurs) Major Axis (2a) : a = 4.8517 arcsec 2a = 9.70 arcsec Uncertainty : 0.032 arcsec 0.06 arcsec Minor Axis (2b) : ... 2b = 6.03 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.621 b/a = 0.62 Uncertainty : 0.003 0.00 Ellipticity : ... 1 - b/a = 0.38 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.44 Uncertainty : ... ... Cos-1(b/a) : ... 52 deg Position Angle [Equinox] : 161.1 deg [J2000] 161 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 : 124.8031708204 20.5107391379 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment : Effective (half-light) radius
No. 16 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J081912.76+203038.6 Frequency Targeted : r (SDSS Exponential) Major Axis (2a) : a = 4.5239 arcsec 2a = 9.05 arcsec Uncertainty : 0.019 arcsec 0.04 arcsec Minor Axis (2b) : ... 2b = 5.25 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.580 b/a = 0.58 Uncertainty : 0.003 0.00 Ellipticity : ... 1 - b/a = 0.42 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.50 Uncertainty : ... ... Cos-1(b/a) : ... 55 deg Position Angle [Equinox] : 161.2 deg [J2000] 161 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 : 124.8031708204 20.5107391379 (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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