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Date and Time of the Query: 2018-11-18 T23:20:44 PST
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Diameter data point(s) for object NGC 7397

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.......:
19.0 (a) arcsec ... ... 0.780 (b/a) ... ... ... 50
[J2000]
20.0 K-mag arcsec^-2^ 1.38E+14 38.00 ... 0.78 0.22 0.24 39 50
[J2000]
2 K_s (2MASS "total")
20032MASX.C.......:
33.1 (a) arcsec ... ... 0.780 (b/a) ... ... ... 50
[J2000]
Diameter for "total" magnitude 1.38E+14 66.20 ... 0.78 0.22 0.24 39 50
[J2000]
3 POSS1 103a-O
1963MCG3..C...0000V
0.30 arcmin 0.20 arcmin ... ... ... ... ... High surface brightness 7.40E+14 18.00 ... 0.67 0.33 0.38 48 ...
4 POSS1 103a-O
1963MCG3..C...0000V
0.60 arcmin 0.40 arcmin ... ... ... ... ... Moderate surface brightness 7.40E+14 36.00 ... 0.67 0.33 0.38 48 ...
5 RC3 D_25, R_25 (blue)
1991RC3.9.C...0000d
0.84 log(2a) + 1 ... ... 0.17
log(a/b)
0.09 ... ... 150
[J2000]
25.0 B-mag arcsec^-2^ 6.81E+14 41.50 9.60 0.68 0.32 0.37 47 150
[J2000]
6 RC3 D_0 (blue)
1991RC3.9.C...0000d
0.85 log(2a) + 1 ... ... ... ... ... ... ... 25.0 B-mag arcsec^-2^ 6.81E+14 42.50 ... ... ... ... ... ...
7 r (SDSS Isophotal)
2004SDSS2.C...0000:
26.03 (a) arcsec 18.75 arcsec ... ... ... ... 153.1
[J2000]
25.0 mag arcsec^-2^ 4.77E+14 52.06 ... 0.72 0.28 0.32 44 153
[J2000]
8 r (SDSS Petrosian)
2004SDSS2.C...0000:
6.13 (a) arcsec ... ... ... 0.03 ... ... ... ... 4.77E+14 12.26 0.06 ... ... ... ... ...
9 r (SDSS de Vaucouleurs)
2004SDSS2.C...0000:
2.59 (a) arcsec ... ... 0.903 (b/a) 0.01 ... ... 11.3
[J2000]
... 4.77E+14 5.19 0.03 0.90 0.10 0.10 25 11
[J2000]
10 r (SDSS Exponential)
2004SDSS2.C...0000:
2.17 (a) arcsec ... ... 0.685 (b/a) 0.01 ... ... 37.2
[J2000]
... 4.77E+14 4.34 0.01 0.69 0.31 0.36 47 37
[J2000]
11 r (SDSS Isophotal)
2007SDSS6.C...0000:
26.03 (a) arcsec 18.75 arcsec ... ... ... ... 153.1
[J2000]
25.0 mag arcsec^-2^ 4.77E+14 52.06 ... 0.72 0.28 0.32 44 153
[J2000]
12 r (SDSS Petrosian)
2007SDSS6.C...0000:
6.13 (a) arcsec ... ... ... 0.030 ... ... ... ... 4.77E+14 12.26 0.06 ... ... ... ... ...
13 r (SDSS deVaucouleurs)
2007SDSS6.C...0000:
2.5939 (a) arcsec ... ... 0.903 (b/a) 0.013 ... ... 11.3
[J2000]
... 4.77E+14 5.19 0.03 0.90 0.10 0.10 25 11
[J2000]
14 r (SDSS Exponential)
2007SDSS6.C...0000:
2.1692 (a) arcsec ... ... 0.685 (b/a) 0.007 ... ... 37.2
[J2000]
... 4.77E+14 4.34 0.01 0.69 0.31 0.36 47 37
[J2000]


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 20032MASX.C.......:
Published Object Name         : 2MASX J22524672+0107579       
Frequency Targeted            : K_s (2MASS isophotal)         
Major Axis (2a)               : a = 19.0       arcsec               2a = 38.00 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : ...                                 2b = 29.64 arcsec
Uncertainty                   : ...                                 ...
Axis Ratio                    : b/a = 0.780                         b/a = 0.78
Uncertainty                   : ...                                 ...
Ellipticity                   : ...                                 1 - b/a = 0.22
Uncertainty                   : ...                                 ...
Eccentricity                  : ...                                 [(a/b)2-1]/[(a/b)2+1] = 0.24
Uncertainty                   : ...                                 ...
Cos-1(b/a)                    : ...                                 39 deg
Position Angle [Equinox]      :   50   deg [J2000]                  50 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          : 343.194641      1.132795    (J2000)
Qualifiers                    : From new, raw data
NED Comment                   :                                         

No. 2 Published Units: Homogenized Units: Reference Code : 20032MASX.C.......: Published Object Name : 2MASX J22524672+0107579 Frequency Targeted : K_s (2MASS "total") Major Axis (2a) : a = 33.1 arcsec 2a = 66.20 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 51.64 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.780 b/a = 0.78 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.22 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.24 Uncertainty : ... ... Cos-1(b/a) : ... 39 deg Position Angle [Equinox] : 50 deg [J2000] 50 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 : 343.194641 1.132795 (J2000) Qualifiers : From new, raw data NED Comment :
No. 3 Published Units: Homogenized Units: Reference Code : 1963MCG3..C...0000V Published Object Name : MCG +00-58-008 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 : 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 : 225018 +0053 (B1950) Qualifiers : From new, raw data NED Comment :
No. 4 Published Units: Homogenized Units: Reference Code : 1963MCG3..C...0000V Published Object Name : MCG +00-58-008 Frequency Targeted : POSS1 103a-O Major Axis (2a) : 0.60 arcmin 2a = 36.00 arcsec Uncertainty : ... ... Minor Axis (2b) : 2b = 0.40 arcmin 2b = 24.00 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 : 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 : 225018 +0053 (B1950) Qualifiers : From new, raw data NED Comment :
No. 5 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : MCG +00-58-008 Frequency Targeted : RC3 D_25, R_25 (blue) Major Axis (2a) : log(2a) + 1 = 0.84 2a = 41.50 arcsec Uncertainty : 0.09 9.60 arcsec Minor Axis (2b) : ... 2b = 28.05 arcsec Uncertainty : ... ... Axis Ratio : log(a/b) = 0.17 b/a = 0.68 Uncertainty : 0.05 0.08 Ellipticity : ... 1 - b/a = 0.32 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.37 Uncertainty : ... ... Cos-1(b/a) : ... 47 deg Position Angle [Equinox] : 150 deg [J2000] 150 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 : 225246.7 +010757. (J2000) Qualifiers : Homogenized from previously published data NED Comment :
No. 6 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : MCG +00-58-008 Frequency Targeted : RC3 D_0 (blue) Major Axis (2a) : log(2a) + 1 = 0.85 2a = 42.50 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 : 225246.7 +010757. (J2000) Qualifiers : Homogenized from previously published data NED Comment : Extinction and inclination corrected.
No. 7 Published Units: Homogenized Units: Reference Code : 2004SDSS2.C...0000: Published Object Name : SDSS J225246.71+010758.1 Frequency Targeted : r (SDSS Isophotal) Major Axis (2a) : a = 26.03 arcsec 2a = 52.06 arcsec Uncertainty : ... ... Minor Axis (2b) : b = 18.75 arcsec 2b = 37.50 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.72 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.28 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.32 Uncertainty : ... ... Cos-1(b/a) : ... 44 deg Position Angle [Equinox] : 153.1 deg [J2000] 153 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 : 343.1946106 1.1328008 (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 : 2004SDSS2.C...0000: Published Object Name : SDSS J225246.71+010758.1 Frequency Targeted : r (SDSS Petrosian) Major Axis (2a) : a = 6.13 arcsec 2a = 12.26 arcsec Uncertainty : 0.03 arcsec 0.06 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 : 343.1946106 1.1328008 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment :
No. 9 Published Units: Homogenized Units: Reference Code : 2004SDSS2.C...0000: Published Object Name : SDSS J225246.71+010758.1 Frequency Targeted : r (SDSS de Vaucouleurs) Major Axis (2a) : a = 2.59 arcsec 2a = 5.19 arcsec Uncertainty : 0.01 arcsec 0.03 arcsec Minor Axis (2b) : ... 2b = 4.69 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.903 b/a = 0.90 Uncertainty : 0.005 0.01 Ellipticity : ... 1 - b/a = 0.10 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.10 Uncertainty : ... ... Cos-1(b/a) : ... 25 deg Position Angle [Equinox] : 11.3 deg [J2000] 11 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 : 343.1946106 1.1328008 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment : Effective (half-light) radius
No. 10 Published Units: Homogenized Units: Reference Code : 2004SDSS2.C...0000: Published Object Name : SDSS J225246.71+010758.1 Frequency Targeted : r (SDSS Exponential) Major Axis (2a) : a = 2.17 arcsec 2a = 4.34 arcsec Uncertainty : 0.01 arcsec 0.01 arcsec Minor Axis (2b) : ... 2b = 2.97 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.685 b/a = 0.69 Uncertainty : 0.003 0.00 Ellipticity : ... 1 - b/a = 0.31 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.36 Uncertainty : ... ... Cos-1(b/a) : ... 47 deg Position Angle [Equinox] : 37.2 deg [J2000] 37 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 : 343.1946106 1.1328008 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment : Effective (half-light) radius
No. 11 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J225246.70+010758.0 Frequency Targeted : r (SDSS Isophotal) Major Axis (2a) : a = 26.03 arcsec 2a = 52.06 arcsec Uncertainty : ... ... Minor Axis (2b) : b = 18.75 arcsec 2b = 37.50 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.72 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.28 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.32 Uncertainty : ... ... Cos-1(b/a) : ... 44 deg Position Angle [Equinox] : 153.1 deg [J2000] 153 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 : 343.1946014949 1.1328008272 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment :
No. 12 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J225246.70+010758.0 Frequency Targeted : r (SDSS Petrosian) Major Axis (2a) : a = 6.13 arcsec 2a = 12.26 arcsec Uncertainty : 0.030 arcsec 0.06 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 : 343.1946014949 1.1328008272 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment :
No. 13 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J225246.70+010758.0 Frequency Targeted : r (SDSS deVaucouleurs) Major Axis (2a) : a = 2.5939 arcsec 2a = 5.19 arcsec Uncertainty : 0.013 arcsec 0.03 arcsec Minor Axis (2b) : ... 2b = 4.68 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.903 b/a = 0.90 Uncertainty : 0.005 0.01 Ellipticity : ... 1 - b/a = 0.10 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.10 Uncertainty : ... ... Cos-1(b/a) : ... 25 deg Position Angle [Equinox] : 11.3 deg [J2000] 11 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 : 343.1946014949 1.1328008272 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment : Effective (half-light) radius
No. 14 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J225246.70+010758.0 Frequency Targeted : r (SDSS Exponential) Major Axis (2a) : a = 2.1692 arcsec 2a = 4.34 arcsec Uncertainty : 0.007 arcsec 0.01 arcsec Minor Axis (2b) : ... 2b = 2.97 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.685 b/a = 0.69 Uncertainty : 0.003 0.00 Ellipticity : ... 1 - b/a = 0.31 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.36 Uncertainty : ... ... Cos-1(b/a) : ... 47 deg Position Angle [Equinox] : 37.2 deg [J2000] 37 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 : 343.1946014949 1.1328008272 (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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