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Date and Time of the Query: 2019-02-16 T06:42:58 PST
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Diameter data point(s) for object NGC 3973

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 K_s (2MASS isophotal)
20032MASX.C.......:
12.2 (a) arcsec ... ... 0.620 (b/a) ... ... ... -25
[J2000]
20.0 K-mag arcsec^-2^ 1.38E+14 24.40 ... 0.62 0.38 0.44 52 155
[J2000]
2 K_s (2MASS "total")
20032MASX.C.......:
22.3 (a) arcsec ... ... 0.620 (b/a) ... ... ... -25
[J2000]
Diameter for "total" magnitude 1.38E+14 44.60 ... 0.62 0.38 0.44 52 155
[J2000]
3 POSS1 103a-O
1963MCG3..C...0000V
0.20 arcmin 0.16 arcmin ... ... ... ... ... Very high surface brightness 7.40E+14 12.00 ... 0.80 0.20 0.22 37 ...
4 POSS1 103a-O
1963MCG3..C...0000V
0.40 arcmin 0.30 arcmin ... ... ... ... ... High surface brightness 7.40E+14 24.00 ... 0.75 0.25 0.28 41 ...
5 r (SDSS Isophotal)
2005SDSS4.C...0000:
3.82 (a) arcsec 3.74 arcsec ... ... ... ... 131.4
[J2000]
25.0 mag arcsec^-2^ 4.77E+14 7.65 ... 0.98 0.02 0.02 12 131
[J2000]
6 r (SDSS Petrosian)
2005SDSS4.C...0000:
1.24 (a) arcsec ... ... ... 0.01 ... ... ... ... 4.77E+14 2.48 0.02 ... ... ... ... ...
7 r (SDSS de Vaucouleurs)
2005SDSS4.C...0000:
0.43 (a) arcsec ... ... 0.831 (b/a) 0.01 ... ... 171.3
[J2000]
... 4.77E+14 0.86 0.02 0.83 0.17 0.18 34 171
[J2000]
8 r (SDSS Exponential)
2005SDSS4.C...0000:
0.46 (a) arcsec ... ... 0.841 (b/a) 0.00 ... ... 172.1
[J2000]
... 4.77E+14 0.93 0.01 0.84 0.16 0.17 33 172
[J2000]
9 r (SDSS Isophotal)
2007SDSS6.C...0000:
3.82 (a) arcsec 3.74 arcsec ... ... ... ... 131.4
[J2000]
25.0 mag arcsec^-2^ 4.77E+14 7.65 ... 0.98 0.02 0.02 12 131
[J2000]
10 r (SDSS Petrosian)
2007SDSS6.C...0000:
1.24 (a) arcsec ... ... ... 0.009 ... ... ... ... 4.77E+14 2.48 0.02 ... ... ... ... ...
11 r (SDSS deVaucouleurs)
2007SDSS6.C...0000:
0.4281 (a) arcsec ... ... 0.831 (b/a) 0.008 ... ... 171.3
[J2000]
... 4.77E+14 0.86 0.02 0.83 0.17 0.18 34 171
[J2000]
12 r (SDSS Exponential)
2007SDSS6.C...0000:
0.4633 (a) arcsec ... ... 0.841 (b/a) 0.003 ... ... 172.1
[J2000]
... 4.77E+14 0.93 0.01 0.84 0.16 0.17 33 172
[J2000]


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 20032MASX.C.......:
Published Object Name         : 2MASX J11553699+1159504       
Frequency Targeted            : K_s (2MASS isophotal)         
Major Axis (2a)               : a = 12.2       arcsec               2a = 24.40 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : ...                                 2b = 15.13 arcsec
Uncertainty                   : ...                                 ...
Axis Ratio                    : b/a = 0.620                         b/a = 0.62
Uncertainty                   : ...                                 ...
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]      :  -25   deg [J2000]                  155 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          : 178.904175      11.997363    (J2000)
Qualifiers                    : From new, raw data
NED Comment                   :                                         

No. 2 Published Units: Homogenized Units: Reference Code : 20032MASX.C.......: Published Object Name : 2MASX J11553699+1159504 Frequency Targeted : K_s (2MASS "total") Major Axis (2a) : a = 22.3 arcsec 2a = 44.60 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 27.65 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.620 b/a = 0.62 Uncertainty : ... ... 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] : -25 deg [J2000] 155 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 : 178.904175 11.997363 (J2000) Qualifiers : From new, raw data NED Comment :
No. 3 Published Units: Homogenized Units: Reference Code : 1963MCG3..C...0000V Published Object Name : MCG +02-31-001 Frequency Targeted : POSS1 103a-O Major Axis (2a) : 0.20 arcmin 2a = 12.00 arcsec Uncertainty : ... ... Minor Axis (2b) : 2b = 0.16 arcmin 2b = 9.60 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.80 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.20 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.22 Uncertainty : ... ... Cos-1(b/a) : ... 37 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 : 115300 +1217 (B1950) Qualifiers : From new, raw data NED Comment :
No. 4 Published Units: Homogenized Units: Reference Code : 1963MCG3..C...0000V Published Object Name : MCG +02-31-001 Frequency Targeted : POSS1 103a-O Major Axis (2a) : 0.40 arcmin 2a = 24.00 arcsec Uncertainty : ... ... Minor Axis (2b) : 2b = 0.30 arcmin 2b = 18.00 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 : 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 : "Outer" diameter Coordinates Targeted : 115300 +1217 (B1950) Qualifiers : From new, raw data NED Comment :
No. 5 Published Units: Homogenized Units: Reference Code : 2005SDSS4.C...0000: Published Object Name : SDSS J115536.99+115950.6 Frequency Targeted : r (SDSS Isophotal) Major Axis (2a) : a = 3.82 arcsec 2a = 7.65 arcsec Uncertainty : ... ... Minor Axis (2b) : b = 3.74 arcsec 2b = 7.49 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.98 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.02 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.02 Uncertainty : ... ... Cos-1(b/a) : ... 12 deg Position Angle [Equinox] : 131.4 deg [J2000] 131 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 : 178.9041443 11.9973927 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment :
No. 6 Published Units: Homogenized Units: Reference Code : 2005SDSS4.C...0000: Published Object Name : SDSS J115536.99+115950.6 Frequency Targeted : r (SDSS Petrosian) Major Axis (2a) : a = 1.24 arcsec 2a = 2.48 arcsec Uncertainty : 0.01 arcsec 0.02 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 : 178.9041443 11.9973927 (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 : 2005SDSS4.C...0000: Published Object Name : SDSS J115536.99+115950.6 Frequency Targeted : r (SDSS de Vaucouleurs) Major Axis (2a) : a = 0.43 arcsec 2a = 0.86 arcsec Uncertainty : 0.01 arcsec 0.02 arcsec Minor Axis (2b) : ... 2b = 0.71 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.831 b/a = 0.83 Uncertainty : 0.013 0.01 Ellipticity : ... 1 - b/a = 0.17 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.18 Uncertainty : ... ... Cos-1(b/a) : ... 34 deg Position Angle [Equinox] : 171.3 deg [J2000] 171 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 : 178.9041443 11.9973927 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment : Effective (half-light) radius
No. 8 Published Units: Homogenized Units: Reference Code : 2005SDSS4.C...0000: Published Object Name : SDSS J115536.99+115950.6 Frequency Targeted : r (SDSS Exponential) Major Axis (2a) : a = 0.46 arcsec 2a = 0.93 arcsec Uncertainty : 0.00 arcsec 0.01 arcsec Minor Axis (2b) : ... 2b = 0.78 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.841 b/a = 0.84 Uncertainty : 0.010 0.01 Ellipticity : ... 1 - b/a = 0.16 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.17 Uncertainty : ... ... Cos-1(b/a) : ... 33 deg Position Angle [Equinox] : 172.1 deg [J2000] 172 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 : 178.9041443 11.9973927 (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 J115536.99+115950.6 Frequency Targeted : r (SDSS Isophotal) Major Axis (2a) : a = 3.82 arcsec 2a = 7.65 arcsec Uncertainty : ... ... Minor Axis (2b) : b = 3.74 arcsec 2b = 7.49 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.98 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.02 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.02 Uncertainty : ... ... Cos-1(b/a) : ... 12 deg Position Angle [Equinox] : 131.4 deg [J2000] 131 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 : 178.9041474029 11.9973921551 (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 : 2007SDSS6.C...0000: Published Object Name : SDSS J115536.99+115950.6 Frequency Targeted : r (SDSS Petrosian) Major Axis (2a) : a = 1.24 arcsec 2a = 2.48 arcsec Uncertainty : 0.009 arcsec 0.02 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 : 178.9041474029 11.9973921551 (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 : 2007SDSS6.C...0000: Published Object Name : SDSS J115536.99+115950.6 Frequency Targeted : r (SDSS deVaucouleurs) Major Axis (2a) : a = 0.4281 arcsec 2a = 0.86 arcsec Uncertainty : 0.008 arcsec 0.02 arcsec Minor Axis (2b) : ... 2b = 0.71 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.831 b/a = 0.83 Uncertainty : 0.013 0.01 Ellipticity : ... 1 - b/a = 0.17 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.18 Uncertainty : ... ... Cos-1(b/a) : ... 34 deg Position Angle [Equinox] : 171.3 deg [J2000] 171 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 : 178.9041474029 11.9973921551 (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 : 2007SDSS6.C...0000: Published Object Name : SDSS J115536.99+115950.6 Frequency Targeted : r (SDSS Exponential) Major Axis (2a) : a = 0.4633 arcsec 2a = 0.93 arcsec Uncertainty : 0.003 arcsec 0.01 arcsec Minor Axis (2b) : ... 2b = 0.78 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.841 b/a = 0.84 Uncertainty : 0.010 0.01 Ellipticity : ... 1 - b/a = 0.16 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.17 Uncertainty : ... ... Cos-1(b/a) : ... 33 deg Position Angle [Equinox] : 172.1 deg [J2000] 172 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 : 178.9041474029 11.9973921551 (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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