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Date and Time of the Query: 2019-05-19 T10:05:27 PDT
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Diameter data point(s) for object NGC 4318

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
0.80 arcmin 0.60 arcmin ... ... ... ... 65
[B1950]
About 25.0 B-mag arcsec^-2^ 7.40E+14 48.00 ... 0.75 0.25 0.28 41 65
[J2000]
2 K_s (2MASS isophotal)
20032MASX.C.......:
20.2 (a) arcsec ... ... 0.680 (b/a) ... ... ... 65
[J2000]
20.0 K-mag arcsec^-2^ 1.38E+14 40.40 ... 0.68 0.32 0.37 47 65
[J2000]
3 K_s (2MASS "total")
20032MASX.C.......:
32.8 (a) arcsec ... ... 0.680 (b/a) ... ... ... 65
[J2000]
Diameter for "total" magnitude 1.38E+14 65.70 ... 0.68 0.32 0.37 47 65
[J2000]
4 POSS1 103a-O
1963MCG3..C...0000V
0.40 arcmin 0.30 arcmin ... ... ... ... ... Very high surface brightness 7.40E+14 24.00 ... 0.75 0.25 0.28 41 ...
5 RC3 D_25, R_25 (blue)
1991RC3.9.C...0000d
0.83 log(2a) + 1 ... ... 0.13
log(a/b)
0.08 ... ... 65
[J2000]
25.0 B-mag arcsec^-2^ 6.81E+14 40.60 8.20 0.74 0.26 0.29 42 65
[J2000]
6 RC3 D_0 (blue)
1991RC3.9.C...0000d
0.79 log(2a) + 1 ... ... ... ... ... ... ... 25.0 B-mag arcsec^-2^ 6.81E+14 37.00 ... ... ... ... ... ...
7 r (SDSS Isophotal)
2005SDSS4.C...0000:
28.38 (a) arcsec 23.63 arcsec ... ... ... ... 64.8
[J2000]
25.0 mag arcsec^-2^ 4.77E+14 56.77 ... 0.83 0.17 0.18 34 65
[J2000]
8 r (SDSS Petrosian)
2005SDSS4.C...0000:
5.00 (a) arcsec ... ... ... 0.17 ... ... ... ... 4.77E+14 10.00 0.34 ... ... ... ... ...
9 r (SDSS de Vaucouleurs)
2005SDSS4.C...0000:
2.74 (a) arcsec ... ... 0.743 (b/a) 0.01 ... ... 65.0
[J2000]
... 4.77E+14 5.48 0.02 0.74 0.26 0.29 42 65
[J2000]
10 r (SDSS Exponential)
2005SDSS4.C...0000:
2.42 (a) arcsec ... ... 0.679 (b/a) 0.01 ... ... 65.6
[J2000]
... 4.77E+14 4.85 0.02 0.68 0.32 0.37 47 66
[J2000]
11 r (SDSS Isophotal)
2007SDSS6.C...0000:
28.38 (a) arcsec 23.63 arcsec ... ... ... ... 64.8
[J2000]
25.0 mag arcsec^-2^ 4.77E+14 56.77 ... 0.83 0.17 0.18 34 65
[J2000]
12 r (SDSS Petrosian)
2007SDSS6.C...0000:
5.00 (a) arcsec ... ... ... 0.169 ... ... ... ... 4.77E+14 10.00 0.34 ... ... ... ... ...
13 r (SDSS deVaucouleurs)
2007SDSS6.C...0000:
2.7381 (a) arcsec ... ... 0.743 (b/a) 0.012 ... ... 65.0
[J2000]
... 4.77E+14 5.48 0.02 0.74 0.26 0.29 42 65
[J2000]
14 r (SDSS Exponential)
2007SDSS6.C...0000:
2.4238 (a) arcsec ... ... 0.679 (b/a) 0.008 ... ... 65.6
[J2000]
... 4.77E+14 4.85 0.02 0.68 0.32 0.37 47 66
[J2000]


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 1973UGC...C...0000N
Published Object Name         : UGC 07446                     
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]      :  65    deg [B1950]                  65 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          : 122012.         +082900.    (B1950)
Qualifiers                    : From new, raw data
NED Comment                   :                                         

No. 2 Published Units: Homogenized Units: Reference Code : 20032MASX.C.......: Published Object Name : 2MASX J12224330+0811541 Frequency Targeted : K_s (2MASS isophotal) Major Axis (2a) : a = 20.2 arcsec 2a = 40.40 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 27.47 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.680 b/a = 0.68 Uncertainty : ... ... 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] : 65 deg [J2000] 65 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 : 185.680405 8.198349 (J2000) Qualifiers : From new, raw data NED Comment :
No. 3 Published Units: Homogenized Units: Reference Code : 20032MASX.C.......: Published Object Name : 2MASX J12224330+0811541 Frequency Targeted : K_s (2MASS "total") Major Axis (2a) : a = 32.8 arcsec 2a = 65.70 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 44.68 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.680 b/a = 0.68 Uncertainty : ... ... 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] : 65 deg [J2000] 65 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 : 185.680405 8.198349 (J2000) Qualifiers : From new, raw data NED Comment :
No. 4 Published Units: Homogenized Units: Reference Code : 1963MCG3..C...0000V Published Object Name : MCG +02-32-015 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 : 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 : 122006 +0830 (B1950) Qualifiers : From new, raw data NED Comment :
No. 5 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : UGC 07446 Frequency Targeted : RC3 D_25, R_25 (blue) Major Axis (2a) : log(2a) + 1 = 0.83 2a = 40.60 arcsec Uncertainty : 0.08 8.20 arcsec Minor Axis (2b) : ... 2b = 30.08 arcsec Uncertainty : ... ... Axis Ratio : log(a/b) = 0.13 b/a = 0.74 Uncertainty : 0.03 0.05 Ellipticity : ... 1 - b/a = 0.26 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.29 Uncertainty : ... ... Cos-1(b/a) : ... 42 deg Position Angle [Equinox] : 65 deg [J2000] 65 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 : 122243.5 +081155. (J2000) Qualifiers : Homogenized from previously published data NED Comment :
No. 6 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : UGC 07446 Frequency Targeted : RC3 D_0 (blue) Major Axis (2a) : log(2a) + 1 = 0.79 2a = 37.00 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 : 122243.5 +081155. (J2000) Qualifiers : Homogenized from previously published data NED Comment : Extinction and inclination corrected.
No. 7 Published Units: Homogenized Units: Reference Code : 2005SDSS4.C...0000: Published Object Name : SDSS J122243.29+081153.8 Frequency Targeted : r (SDSS Isophotal) Major Axis (2a) : a = 28.38 arcsec 2a = 56.77 arcsec Uncertainty : ... ... Minor Axis (2b) : b = 23.63 arcsec 2b = 47.27 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.83 Uncertainty : ... ... 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] : 64.8 deg [J2000] 65 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 : 185.6803894 8.1982775 (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 : 2005SDSS4.C...0000: Published Object Name : SDSS J122243.29+081153.8 Frequency Targeted : r (SDSS Petrosian) Major Axis (2a) : a = 5.00 arcsec 2a = 10.00 arcsec Uncertainty : 0.17 arcsec 0.34 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 : 185.6803894 8.1982775 (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 : 2005SDSS4.C...0000: Published Object Name : SDSS J122243.29+081153.8 Frequency Targeted : r (SDSS de Vaucouleurs) Major Axis (2a) : a = 2.74 arcsec 2a = 5.48 arcsec Uncertainty : 0.01 arcsec 0.02 arcsec Minor Axis (2b) : ... 2b = 4.07 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.743 b/a = 0.74 Uncertainty : 0.004 0.00 Ellipticity : ... 1 - b/a = 0.26 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.29 Uncertainty : ... ... Cos-1(b/a) : ... 42 deg Position Angle [Equinox] : 65.0 deg [J2000] 65 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 : 185.6803894 8.1982775 (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 : 2005SDSS4.C...0000: Published Object Name : SDSS J122243.29+081153.8 Frequency Targeted : r (SDSS Exponential) Major Axis (2a) : a = 2.42 arcsec 2a = 4.85 arcsec Uncertainty : 0.01 arcsec 0.02 arcsec Minor Axis (2b) : ... 2b = 3.29 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.679 b/a = 0.68 Uncertainty : 0.003 0.00 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] : 65.6 deg [J2000] 66 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 : 185.6803894 8.1982775 (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 J122243.29+081153.7 Frequency Targeted : r (SDSS Isophotal) Major Axis (2a) : a = 28.38 arcsec 2a = 56.77 arcsec Uncertainty : ... ... Minor Axis (2b) : b = 23.63 arcsec 2b = 47.27 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.83 Uncertainty : ... ... 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] : 64.8 deg [J2000] 65 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 : 185.6803932704 8.1982773268 (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 J122243.29+081153.7 Frequency Targeted : r (SDSS Petrosian) Major Axis (2a) : a = 5.00 arcsec 2a = 10.00 arcsec Uncertainty : 0.169 arcsec 0.34 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 : 185.6803932704 8.1982773268 (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 J122243.29+081153.7 Frequency Targeted : r (SDSS deVaucouleurs) Major Axis (2a) : a = 2.7381 arcsec 2a = 5.48 arcsec Uncertainty : 0.012 arcsec 0.02 arcsec Minor Axis (2b) : ... 2b = 4.07 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.743 b/a = 0.74 Uncertainty : 0.004 0.00 Ellipticity : ... 1 - b/a = 0.26 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.29 Uncertainty : ... ... Cos-1(b/a) : ... 42 deg Position Angle [Equinox] : 65.0 deg [J2000] 65 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 : 185.6803932704 8.1982773268 (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 J122243.29+081153.7 Frequency Targeted : r (SDSS Exponential) Major Axis (2a) : a = 2.4238 arcsec 2a = 4.85 arcsec Uncertainty : 0.008 arcsec 0.02 arcsec Minor Axis (2b) : ... 2b = 3.29 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.679 b/a = 0.68 Uncertainty : 0.003 0.00 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] : 65.6 deg [J2000] 66 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 : 185.6803932704 8.1982773268 (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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