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Date and Time of the Query: 2018-11-13 T22:26:31 PST
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Diameter data point(s) for object NGC 3787

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.......:
19.4 (a) arcsec ... ... 0.620 (b/a) ... ... ... 25
[J2000]
20.0 K-mag arcsec^-2^ 1.38E+14 38.80 ... 0.62 0.38 0.44 52 25
[J2000]
2 K_s (2MASS "total")
20032MASX.C.......:
31.6 (a) arcsec ... ... 0.620 (b/a) ... ... ... 25
[J2000]
Diameter for "total" magnitude 1.38E+14 63.30 ... 0.62 0.38 0.44 52 25
[J2000]
3 POSS1 103a-O
1964MCG2..C...0000V
0.40 arcmin 0.25 arcmin ... ... ... ... ... Very high surface brightness 7.40E+14 24.00 ... 0.62 0.38 0.44 51 ...
4 r (SDSS Isophotal)
2007SDSS6.C...0000:
27.93 (a) arcsec 24.38 arcsec ... ... ... ... 24.7
[J2000]
25.0 mag arcsec^-2^ 4.77E+14 55.86 ... 0.87 0.13 0.13 29 25
[J2000]
5 r (SDSS Petrosian)
2007SDSS6.C...0000:
4.20 (a) arcsec ... ... ... 0.235 ... ... ... ... 4.77E+14 8.41 0.47 ... ... ... ... ...
6 r (SDSS deVaucouleurs)
2007SDSS6.C...0000:
2.6289 (a) arcsec ... ... 0.700 (b/a) 0.010 ... ... 22.1
[J2000]
... 4.77E+14 5.26 0.02 0.70 0.30 0.34 46 22
[J2000]
7 r (SDSS Exponential)
2007SDSS6.C...0000:
2.0309 (a) arcsec ... ... 0.632 (b/a) 0.008 ... ... 21.7
[J2000]
... 4.77E+14 4.06 0.02 0.63 0.37 0.43 51 22
[J2000]


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 20032MASX.C.......:
Published Object Name         : 2MASX J11393798+2027169       
Frequency Targeted            : K_s (2MASS isophotal)         
Major Axis (2a)               : a = 19.4       arcsec               2a = 38.80 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : ...                                 2b = 24.06 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]                  25 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          : 174.908188      20.454681    (J2000)
Qualifiers                    : From new, raw data
NED Comment                   :                                         

No. 2 Published Units: Homogenized Units: Reference Code : 20032MASX.C.......: Published Object Name : 2MASX J11393798+2027169 Frequency Targeted : K_s (2MASS "total") Major Axis (2a) : a = 31.6 arcsec 2a = 63.30 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 39.25 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] 25 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 : 174.908188 20.454681 (J2000) Qualifiers : From new, raw data NED Comment :
No. 3 Published Units: Homogenized Units: Reference Code : 1964MCG2..C...0000V Published Object Name : MCG +04-28-015 Frequency Targeted : POSS1 103a-O Major Axis (2a) : 0.40 arcmin 2a = 24.00 arcsec Uncertainty : ... ... Minor Axis (2b) : 2b = 0.25 arcmin 2b = 15.00 arcsec Uncertainty : ... ... Axis Ratio : ... 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) : ... 51 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 : "Outer" diameter Coordinates Targeted : 113706 +2045 (B1950) Qualifiers : From new, raw data NED Comment :
No. 4 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J113937.94+202716.8 Frequency Targeted : r (SDSS Isophotal) Major Axis (2a) : a = 27.93 arcsec 2a = 55.86 arcsec Uncertainty : ... ... Minor Axis (2b) : b = 24.38 arcsec 2b = 48.76 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.87 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.13 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.13 Uncertainty : ... ... Cos-1(b/a) : ... 29 deg Position Angle [Equinox] : 24.7 deg [J2000] 25 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 : 174.9081087411 20.4546909235 (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 J113937.94+202716.8 Frequency Targeted : r (SDSS Petrosian) Major Axis (2a) : a = 4.20 arcsec 2a = 8.41 arcsec Uncertainty : 0.235 arcsec 0.47 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 : 174.9081087411 20.4546909235 (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 : 2007SDSS6.C...0000: Published Object Name : SDSS J113937.94+202716.8 Frequency Targeted : r (SDSS deVaucouleurs) Major Axis (2a) : a = 2.6289 arcsec 2a = 5.26 arcsec Uncertainty : 0.010 arcsec 0.02 arcsec Minor Axis (2b) : ... 2b = 3.68 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.700 b/a = 0.70 Uncertainty : 0.003 0.00 Ellipticity : ... 1 - b/a = 0.30 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.34 Uncertainty : ... ... Cos-1(b/a) : ... 46 deg Position Angle [Equinox] : 22.1 deg [J2000] 22 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 : 174.9081087411 20.4546909235 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment : Effective (half-light) radius
No. 7 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J113937.94+202716.8 Frequency Targeted : r (SDSS Exponential) Major Axis (2a) : a = 2.0309 arcsec 2a = 4.06 arcsec Uncertainty : 0.008 arcsec 0.02 arcsec Minor Axis (2b) : ... 2b = 2.57 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.632 b/a = 0.63 Uncertainty : 0.003 0.00 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] : 21.7 deg [J2000] 22 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 : 174.9081087411 20.4546909235 (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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