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Date and Time of the Query: 2019-04-20 T14:01:13 PDT
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Diameter data point(s) for object IC 3490

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 RC3 D_25, R_25 (blue)
1991RC3.9.C...0000d
0.80 log(2a) + 1 ... ... 0.27
log(a/b)
0.13 ... ... ... 25.0 B-mag arcsec^-2^ 6.81E+14 37.90 13.20 0.54 0.46 0.55 58 ...
2 RC3 D_0 (blue)
1991RC3.9.C...0000d
0.72 log(2a) + 1 ... ... ... ... ... ... ... 25.0 B-mag arcsec^-2^ 6.81E+14 31.50 ... ... ... ... ... ...
3 r (SDSS Isophotal)
2007SDSS6.C...0000:
28.28 (a) arcsec 15.59 arcsec ... ... ... ... 64.7
[J2000]
25.0 mag arcsec^-2^ 4.77E+14 56.57 ... 0.55 0.45 0.53 57 65
[J2000]
4 r (SDSS Petrosian)
2007SDSS6.C...0000:
9.65 (a) arcsec ... ... ... 0.797 ... ... ... ... 4.77E+14 19.30 1.59 ... ... ... ... ...
5 r (SDSS deVaucouleurs)
2007SDSS6.C...0000:
11.7514 (a) arcsec ... ... 0.726 (b/a) 0.105 ... ... 65.1
[J2000]
... 4.77E+14 23.50 0.21 0.73 0.27 0.31 43 65
[J2000]
6 r (SDSS Exponential)
2007SDSS6.C...0000:
5.2120 (a) arcsec ... ... 0.561 (b/a) 0.043 ... ... 64.3
[J2000]
... 4.77E+14 10.42 0.09 0.56 0.44 0.52 56 64
[J2000]


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 1991RC3.9.C...0000d
Published Object Name         : CGCG 070-162                  
Frequency Targeted            : RC3 D_25, R_25 (blue)         
Major Axis (2a)               : log(2a) + 1 = 0.80                  2a = 37.90 arcsec
Uncertainty                   :   0.13                              13.20 arcsec              
Minor Axis (2b)               : ...                                 2b = 20.35 arcsec
Uncertainty                   : ...                                 ...
Axis Ratio                    : log(a/b) =  0.27                    b/a = 0.54
Uncertainty                   :   0.08                              0.11
Ellipticity                   : ...                                 1 - b/a = 0.46
Uncertainty                   : ...                                 ...
Eccentricity                  : ...                                 [(a/b)2-1]/[(a/b)2+1] = 0.55
Uncertainty                   : ...                                 ...
Cos-1(b/a)                    : ...                                 58 deg
Position Angle [Equinox]      : ...                                 ...
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          : 123314.0        +105534.    (J2000)
Qualifiers                    : Homogenized from previously published data
NED Comment                   :                                         

No. 2 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : CGCG 070-162 Frequency Targeted : RC3 D_0 (blue) Major Axis (2a) : log(2a) + 1 = 0.72 2a = 31.50 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 : 123314.0 +105534. (J2000) Qualifiers : Homogenized from previously published data NED Comment : Extinction and inclination corrected.
No. 3 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J123313.90+105542.7 Frequency Targeted : r (SDSS Isophotal) Major Axis (2a) : a = 28.28 arcsec 2a = 56.57 arcsec Uncertainty : ... ... Minor Axis (2b) : b = 15.59 arcsec 2b = 31.18 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.55 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.45 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.53 Uncertainty : ... ... Cos-1(b/a) : ... 57 deg Position Angle [Equinox] : 64.7 deg [J2000] 65 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 : 188.3079342381 10.9285361885 (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 : 2007SDSS6.C...0000: Published Object Name : SDSS J123313.90+105542.7 Frequency Targeted : r (SDSS Petrosian) Major Axis (2a) : a = 9.65 arcsec 2a = 19.30 arcsec Uncertainty : 0.797 arcsec 1.59 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 : 188.3079342381 10.9285361885 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment :
No. 5 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J123313.90+105542.7 Frequency Targeted : r (SDSS deVaucouleurs) Major Axis (2a) : a = 11.7514 arcsec 2a = 23.50 arcsec Uncertainty : 0.105 arcsec 0.21 arcsec Minor Axis (2b) : ... 2b = 17.06 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.726 b/a = 0.73 Uncertainty : 0.011 0.01 Ellipticity : ... 1 - b/a = 0.27 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.31 Uncertainty : ... ... Cos-1(b/a) : ... 43 deg Position Angle [Equinox] : 65.1 deg [J2000] 65 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 : 188.3079342381 10.9285361885 (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 J123313.90+105542.7 Frequency Targeted : r (SDSS Exponential) Major Axis (2a) : a = 5.2120 arcsec 2a = 10.42 arcsec Uncertainty : 0.043 arcsec 0.09 arcsec Minor Axis (2b) : ... 2b = 5.85 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.561 b/a = 0.56 Uncertainty : 0.007 0.01 Ellipticity : ... 1 - b/a = 0.44 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.52 Uncertainty : ... ... Cos-1(b/a) : ... 56 deg Position Angle [Equinox] : 64.3 deg [J2000] 64 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 : 188.3079342381 10.9285361885 (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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