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Date and Time of the Query: 2019-03-24 T04:25:10 PDT
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Diameter data point(s) for object NGC 3683

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
2.10 arcmin 0.80 arcmin ... ... ... ... 128
[B1950]
About 25.0 B-mag arcsec^-2^ 7.40E+14 126.00 ... 0.38 0.62 0.75 68 128
[J2000]
2 POSS1 103a-O
1962MCG1..C...0000V
1.20 arcmin 0.45 arcmin ... ... ... ... ... Very high surface brightness 7.40E+14 72.00 ... 0.38 0.62 0.75 68 ...
3 POSS1 103a-O
1962MCG1..C...0000V
1.60 arcmin 0.65 arcmin ... ... ... ... ... Moderate surface brightness 7.40E+14 96.00 ... 0.41 0.59 0.72 66 ...
4 RC3 D_25, R_25 (blue)
1991RC3.9.C...0000d
1.27 log(2a) + 1 ... ... 0.43
log(a/b)
0.04 ... ... 128
[J2000]
25.0 B-mag arcsec^-2^ 6.81E+14 111.70 10.80 0.37 0.63 0.76 68 128
[J2000]
5 RC3 D_0 (blue)
1991RC3.9.C...0000d
1.27 log(2a) + 1 ... ... ... ... ... ... ... 25.0 B-mag arcsec^-2^ 6.81E+14 111.70 ... ... ... ... ... ...
6 K_s (LGA/2MASS isophotal)
2003AJ....125..525J
45.8 (a) arcsec ... ... 0.330 (b/a) ... ... ... -54.5
[J2000]
20.0 K-mag arcsec^-2^ 1.38E+14 91.60 ... 0.33 0.67 0.80 71 126
[J2000]
7 K_s (LGA/2MASS "total")
2003AJ....125..525J
95.1 (a) arcsec ... ... 0.330 (b/a) ... ... ... -54.5
[J2000]
Diameter for "total" magnitude 1.38E+14 190.20 ... 0.33 0.67 0.80 71 126
[J2000]
8 r (SDSS Isophotal)
2004SDSS3.C...0000:
58.92 (a) arcsec 32.97 arcsec ... ... ... ... 125.4
[J2000]
25.0 mag arcsec^-2^ 4.77E+14 117.85 ... 0.56 0.44 0.52 56 125
[J2000]
9 r (SDSS Petrosian)
2004SDSS3.C...0000:
12.13 (a) arcsec ... ... ... 0.96 ... ... ... ... 4.77E+14 24.25 1.92 ... ... ... ... ...
10 r (SDSS de Vaucouleurs)
2004SDSS3.C...0000:
9.43 (a) arcsec ... ... 0.482 (b/a) 0.04 ... ... 130.3
[J2000]
... 4.77E+14 18.87 0.09 0.48 0.52 0.62 61 130
[J2000]
11 r (SDSS Exponential)
2004SDSS3.C...0000:
7.03 (a) arcsec ... ... 0.377 (b/a) 0.02 ... ... 131.3
[J2000]
... 4.77E+14 14.05 0.05 0.38 0.62 0.75 68 131
[J2000]


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 1973UGC...C...0000N
Published Object Name         : UGC 06458                     
Frequency Targeted            : POSS1 103a-O                  
Major Axis (2a)               : 2.10       arcmin                   2a = 126.00 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : 2b =  0.80      arcmin              2b = 48.00 arcsec 
Uncertainty                   : ...                                 ...
Axis Ratio                    : ...                                 b/a = 0.38
Uncertainty                   : ...                                 ...
Ellipticity                   : ...                                 1 - b/a = 0.62
Uncertainty                   : ...                                 ...
Eccentricity                  : ...                                 [(a/b)2-1]/[(a/b)2+1] = 0.75
Uncertainty                   : ...                                 ...
Cos-1(b/a)                    : ...                                 68 deg
Position Angle [Equinox]      : 128    deg [B1950]                  128 deg [J2000]
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          : 112442.         +571000.    (B1950)
Qualifiers                    : From new, raw data
NED Comment                   : Major diameter flagged uncertain.       

No. 2 Published Units: Homogenized Units: Reference Code : 1962MCG1..C...0000V Published Object Name : MCG +10-16-143 Frequency Targeted : POSS1 103a-O Major Axis (2a) : 1.20 arcmin 2a = 72.00 arcsec Uncertainty : ... ... Minor Axis (2b) : 2b = 0.45 arcmin 2b = 27.00 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.38 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.62 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.75 Uncertainty : ... ... Cos-1(b/a) : ... 68 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 : 112436 +5708 (B1950) Qualifiers : From new, raw data NED Comment :
No. 3 Published Units: Homogenized Units: Reference Code : 1962MCG1..C...0000V Published Object Name : MCG +10-16-143 Frequency Targeted : POSS1 103a-O Major Axis (2a) : 1.60 arcmin 2a = 96.00 arcsec Uncertainty : ... ... Minor Axis (2b) : 2b = 0.65 arcmin 2b = 39.00 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.41 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.59 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.72 Uncertainty : ... ... Cos-1(b/a) : ... 66 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 : 112436 +5708 (B1950) Qualifiers : From new, raw data NED Comment :
No. 4 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : UGC 06458 Frequency Targeted : RC3 D_25, R_25 (blue) Major Axis (2a) : log(2a) + 1 = 1.27 2a = 111.70 arcsec Uncertainty : 0.04 10.80 arcsec Minor Axis (2b) : ... 2b = 41.55 arcsec Uncertainty : ... ... Axis Ratio : log(a/b) = 0.43 b/a = 0.37 Uncertainty : 0.04 0.04 Ellipticity : ... 1 - b/a = 0.63 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.76 Uncertainty : ... ... Cos-1(b/a) : ... 68 deg Position Angle [Equinox] : 128 deg [J2000] 128 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 : 112732.1 +565243. (J2000) Qualifiers : Homogenized from previously published data NED Comment :
No. 5 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : UGC 06458 Frequency Targeted : RC3 D_0 (blue) Major Axis (2a) : log(2a) + 1 = 1.27 2a = 111.70 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 : 112732.1 +565243. (J2000) Qualifiers : Homogenized from previously published data NED Comment : Extinction and inclination corrected.
No. 6 Published Units: Homogenized Units: Reference Code : 2003AJ....125..525J Published Object Name : NGC 3683 Frequency Targeted : K_s (LGA/2MASS isophotal) Major Axis (2a) : a = 45.8 arcsec 2a = 91.60 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 30.23 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.330 b/a = 0.33 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.67 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.80 Uncertainty : ... ... Cos-1(b/a) : ... 71 deg Position Angle [Equinox] : -54.5 deg [J2000] 126 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 : 171.882874 56.876709 (J2000) Qualifiers : From new, raw data NED Comment :
No. 7 Published Units: Homogenized Units: Reference Code : 2003AJ....125..525J Published Object Name : NGC 3683 Frequency Targeted : K_s (LGA/2MASS "total") Major Axis (2a) : a = 95.1 arcsec 2a = 190.20 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 62.77 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.330 b/a = 0.33 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.67 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.80 Uncertainty : ... ... Cos-1(b/a) : ... 71 deg Position Angle [Equinox] : -54.5 deg [J2000] 126 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 : 171.882874 56.876709 (J2000) Qualifiers : From new, raw data NED Comment :
No. 8 Published Units: Homogenized Units: Reference Code : 2004SDSS3.C...0000: Published Object Name : SDSS J112731.85+565237.4 Frequency Targeted : r (SDSS Isophotal) Major Axis (2a) : a = 58.92 arcsec 2a = 117.85 arcsec Uncertainty : ... ... Minor Axis (2b) : b = 32.97 arcsec 2b = 65.95 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.56 Uncertainty : ... ... 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] : 125.4 deg [J2000] 125 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 : 171.8826904 56.8770599 (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 : 2004SDSS3.C...0000: Published Object Name : SDSS J112731.85+565237.4 Frequency Targeted : r (SDSS Petrosian) Major Axis (2a) : a = 12.13 arcsec 2a = 24.25 arcsec Uncertainty : 0.96 arcsec 1.92 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 : 171.8826904 56.8770599 (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 : 2004SDSS3.C...0000: Published Object Name : SDSS J112731.85+565237.4 Frequency Targeted : r (SDSS de Vaucouleurs) Major Axis (2a) : a = 9.43 arcsec 2a = 18.87 arcsec Uncertainty : 0.04 arcsec 0.09 arcsec Minor Axis (2b) : ... 2b = 9.10 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.482 b/a = 0.48 Uncertainty : 0.003 0.00 Ellipticity : ... 1 - b/a = 0.52 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.62 Uncertainty : ... ... Cos-1(b/a) : ... 61 deg Position Angle [Equinox] : 130.3 deg [J2000] 130 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 : 171.8826904 56.8770599 (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 : 2004SDSS3.C...0000: Published Object Name : SDSS J112731.85+565237.4 Frequency Targeted : r (SDSS Exponential) Major Axis (2a) : a = 7.03 arcsec 2a = 14.05 arcsec Uncertainty : 0.02 arcsec 0.05 arcsec Minor Axis (2b) : ... 2b = 5.30 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.377 b/a = 0.38 Uncertainty : 0.002 0.00 Ellipticity : ... 1 - b/a = 0.62 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.75 Uncertainty : ... ... Cos-1(b/a) : ... 68 deg Position Angle [Equinox] : 131.3 deg [J2000] 131 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 : 171.8826904 56.8770599 (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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