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Date and Time of the Query: 2019-03-19 T18:51:51 PDT
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Diameter data point(s) for object NGC 3687

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
1.80 arcmin 1.80 arcmin ... ... ... ... ... About 25.0 B-mag arcsec^-2^ 7.40E+14 108.00 ... 1.00 0.00 0.00 0 ...
2 K_s (2MASS isophotal)
20032MASX.C.......:
30.7 (a) arcsec ... ... 0.880 (b/a) ... ... ... 40
[J2000]
20.0 K-mag arcsec^-2^ 1.38E+14 61.40 ... 0.88 0.12 0.13 28 40
[J2000]
3 K_s (2MASS isophotal)
20032MASX.C.......:
21.8 (a) arcsec ... ... 1.000 (b/a) ... ... ... 90
[J2000]
20.0 K-mag arcsec^-2^ 1.38E+14 43.60 ... 1.00 0.00 0.00 0 90
[J2000]
4 K_s (2MASS "total")
20032MASX.C.......:
51.8 (a) arcsec ... ... 0.880 (b/a) ... ... ... 40
[J2000]
Diameter for "total" magnitude 1.38E+14 103.50 ... 0.88 0.12 0.13 28 40
[J2000]
5 K_s (2MASS "total")
20032MASX.C.......:
49.5 (a) arcsec ... ... 1.000 (b/a) ... ... ... 90
[J2000]
Diameter for "total" magnitude 1.38E+14 99.00 ... 1.00 0.00 0.00 0 90
[J2000]
6 POSS1 103a-O
1964MCG2..C...0000V
0.80 arcmin 0.60 arcmin ... ... ... ... ... Very high surface brightness 7.40E+14 48.00 ... 0.75 0.25 0.28 41 ...
7 POSS1 103a-O
1964MCG2..C...0000V
2.00 arcmin 2.00 arcmin ... ... ... ... ... Intermed. surface brightness 7.40E+14 120.00 ... 1.00 0.00 0.00 0 ...
8 RC3 D_25, R_25 (blue)
1991RC3.9.C...0000d
1.28 log(2a) + 1 ... ... 0.00
log(a/b)
0.03 ... ... ... 25.0 B-mag arcsec^-2^ 6.81E+14 114.30 8.20 1.00 0.00 0.00 0 ...
9 RC3 D_0 (blue)
1991RC3.9.C...0000d
1.28 log(2a) + 1 ... ... ... ... ... ... ... 25.0 B-mag arcsec^-2^ 6.81E+14 114.30 ... ... ... ... ... ...
10 r (SDSS Isophotal)
2007SDSS6.C...0000:
50.59 (a) arcsec 39.39 arcsec ... ... ... ... 154.9
[J2000]
25.0 mag arcsec^-2^ 4.77E+14 101.17 ... 0.78 0.22 0.24 39 155
[J2000]
11 r (SDSS Petrosian)
2007SDSS6.C...0000:
12.86 (a) arcsec ... ... ... 0.120 ... ... ... ... 4.77E+14 25.73 0.24 ... ... ... ... ...
12 r (SDSS deVaucouleurs)
2007SDSS6.C...0000:
6.4358 (a) arcsec ... ... 0.790 (b/a) 0.029 ... ... 165.7
[J2000]
... 4.77E+14 12.87 0.06 0.79 0.21 0.23 38 166
[J2000]
13 r (SDSS Exponential)
2007SDSS6.C...0000:
5.8506 (a) arcsec ... ... 0.859 (b/a) 0.020 ... ... 158.2
[J2000]
... 4.77E+14 11.70 0.04 0.86 0.14 0.15 31 158
[J2000]


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 1973UGC...C...0000N
Published Object Name         : UGC 06463                     
Frequency Targeted            : POSS1 103a-O                  
Major Axis (2a)               : 1.80       arcmin                   2a = 108.00 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : 2b =  1.80      arcmin              2b = 108.00 arcsec 
Uncertainty                   : ...                                 ...
Axis Ratio                    : ...                                 b/a = 1.00
Uncertainty                   : ...                                 ...
Ellipticity                   : ...                                 1 - b/a = 0.00
Uncertainty                   : ...                                 ...
Eccentricity                  : ...                                 [(a/b)2-1]/[(a/b)2+1] = 0.00
Uncertainty                   : ...                                 ...
Cos-1(b/a)                    : ...                                 0 deg
Position Angle [Equinox]      : ...                                 ...
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          : 112518.         +294700.    (B1950)
Qualifiers                    : From new, raw data
NED Comment                   :                                         

No. 2 Published Units: Homogenized Units: Reference Code : 20032MASX.C.......: Published Object Name : 2MASX J11280056+2930397 Frequency Targeted : K_s (2MASS isophotal) Major Axis (2a) : a = 30.7 arcsec 2a = 61.40 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 54.03 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.880 b/a = 0.88 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.12 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.13 Uncertainty : ... ... Cos-1(b/a) : ... 28 deg Position Angle [Equinox] : 40 deg [J2000] 40 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 : 172.002426 29.511026 (J2000) Qualifiers : From new, raw data NED Comment :
No. 3 Published Units: Homogenized Units: Reference Code : 20032MASX.C.......: Published Object Name : 2MASX J11280164+2930527 Frequency Targeted : K_s (2MASS isophotal) Major Axis (2a) : a = 21.8 arcsec 2a = 43.60 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 43.60 arcsec Uncertainty : ... ... Axis Ratio : b/a = 1.000 b/a = 1.00 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.00 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.00 Uncertainty : ... ... Cos-1(b/a) : ... 0 deg Position Angle [Equinox] : 90 deg [J2000] 90 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 : 172.006744 29.514587 (J2000) Qualifiers : From new, raw data NED Comment :
No. 4 Published Units: Homogenized Units: Reference Code : 20032MASX.C.......: Published Object Name : 2MASX J11280056+2930397 Frequency Targeted : K_s (2MASS "total") Major Axis (2a) : a = 51.8 arcsec 2a = 103.50 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 91.08 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.880 b/a = 0.88 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.12 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.13 Uncertainty : ... ... Cos-1(b/a) : ... 28 deg Position Angle [Equinox] : 40 deg [J2000] 40 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 : 172.002426 29.511026 (J2000) Qualifiers : From new, raw data NED Comment :
No. 5 Published Units: Homogenized Units: Reference Code : 20032MASX.C.......: Published Object Name : 2MASX J11280164+2930527 Frequency Targeted : K_s (2MASS "total") Major Axis (2a) : a = 49.5 arcsec 2a = 99.00 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 99.00 arcsec Uncertainty : ... ... Axis Ratio : b/a = 1.000 b/a = 1.00 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.00 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.00 Uncertainty : ... ... Cos-1(b/a) : ... 0 deg Position Angle [Equinox] : 90 deg [J2000] 90 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 : 172.006744 29.514587 (J2000) Qualifiers : From new, raw data NED Comment :
No. 6 Published Units: Homogenized Units: Reference Code : 1964MCG2..C...0000V Published Object Name : MCG +05-27-073 Frequency Targeted : POSS1 103a-O Major Axis (2a) : 0.80 arcmin 2a = 48.00 arcsec Uncertainty : ... ... Minor Axis (2b) : 2b = 0.60 arcmin 2b = 36.00 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 : 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 : 112518 +2947 (B1950) Qualifiers : From new, raw data NED Comment :
No. 7 Published Units: Homogenized Units: Reference Code : 1964MCG2..C...0000V Published Object Name : MCG +05-27-073 Frequency Targeted : POSS1 103a-O Major Axis (2a) : 2.00 arcmin 2a = 120.00 arcsec Uncertainty : ... ... Minor Axis (2b) : 2b = 2.00 arcmin 2b = 120.00 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 1.00 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.00 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.00 Uncertainty : ... ... Cos-1(b/a) : ... 0 deg Position Angle [Equinox] : ... ... Uncertainty : ... ... Significance : No uncertainty reported Diameter Reference Level : Intermed. 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 : 112518 +2947 (B1950) Qualifiers : From new, raw data NED Comment :
No. 8 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : UGC 06463 Frequency Targeted : RC3 D_25, R_25 (blue) Major Axis (2a) : log(2a) + 1 = 1.28 2a = 114.30 arcsec Uncertainty : 0.03 8.20 arcsec Minor Axis (2b) : ... 2b = 114.30 arcsec Uncertainty : ... ... Axis Ratio : log(a/b) = 0.00 b/a = 1.00 Uncertainty : 0.04 0.10 Ellipticity : ... 1 - b/a = 0.00 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.00 Uncertainty : ... ... Cos-1(b/a) : ... 0 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 : 112800.6 +293041. (J2000) Qualifiers : Homogenized from previously published data NED Comment :
No. 9 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : UGC 06463 Frequency Targeted : RC3 D_0 (blue) Major Axis (2a) : log(2a) + 1 = 1.28 2a = 114.30 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 : 112800.6 +293041. (J2000) Qualifiers : Homogenized from previously published data NED Comment : Extinction and inclination corrected.
No. 10 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J112800.60+293039.8 Frequency Targeted : r (SDSS Isophotal) Major Axis (2a) : a = 50.59 arcsec 2a = 101.17 arcsec Uncertainty : ... ... Minor Axis (2b) : b = 39.39 arcsec 2b = 78.77 arcsec Uncertainty : ... ... Axis Ratio : ... 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] : 154.9 deg [J2000] 155 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 : 172.0025332939 29.5110589870 (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 J112800.60+293039.8 Frequency Targeted : r (SDSS Petrosian) Major Axis (2a) : a = 12.86 arcsec 2a = 25.73 arcsec Uncertainty : 0.120 arcsec 0.24 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 : 172.0025332939 29.5110589870 (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 J112800.60+293039.8 Frequency Targeted : r (SDSS deVaucouleurs) Major Axis (2a) : a = 6.4358 arcsec 2a = 12.87 arcsec Uncertainty : 0.029 arcsec 0.06 arcsec Minor Axis (2b) : ... 2b = 10.17 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.790 b/a = 0.79 Uncertainty : 0.004 0.00 Ellipticity : ... 1 - b/a = 0.21 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.23 Uncertainty : ... ... Cos-1(b/a) : ... 38 deg Position Angle [Equinox] : 165.7 deg [J2000] 166 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 : 172.0025332939 29.5110589870 (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 J112800.60+293039.8 Frequency Targeted : r (SDSS Exponential) Major Axis (2a) : a = 5.8506 arcsec 2a = 11.70 arcsec Uncertainty : 0.020 arcsec 0.04 arcsec Minor Axis (2b) : ... 2b = 10.05 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.859 b/a = 0.86 Uncertainty : 0.003 0.00 Ellipticity : ... 1 - b/a = 0.14 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.15 Uncertainty : ... ... Cos-1(b/a) : ... 31 deg Position Angle [Equinox] : 158.2 deg [J2000] 158 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 : 172.0025332939 29.5110589870 (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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