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Date and Time of the Query: 2019-06-20 T08:33:09 PDT
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Diameter data point(s) for object NGC 4173

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
5.10 arcmin 0.80 arcmin ... ... ... ... 134
[B1950]
About 25.0 B-mag arcsec^-2^ 7.40E+14 306.00 ... 0.16 0.84 0.95 81 134
[J2000]
2 POSS1 103a-O
1964MCG2..C...0000V
4.50 arcmin 0.50 arcmin ... ... ... ... ... Low surface brightness 7.40E+14 270.00 ... 0.11 0.89 0.98 84 ...
3 RC3 D_25, R_25 (blue)
1991RC3.9.C...0000d
1.70 log(2a) + 1 ... ... 0.84
log(a/b)
0.02 ... ... 134
[J2000]
25.0 B-mag arcsec^-2^ 6.81E+14 300.70 14.20 0.14 0.85 0.96 82 134
[J2000]
4 RC3 D_0 (blue)
1991RC3.9.C...0000d
1.70 log(2a) + 1 ... ... ... ... ... ... ... 25.0 B-mag arcsec^-2^ 6.81E+14 300.70 ... ... ... ... ... ...
5 r (SDSS Isophotal)
2007SDSS6.C...0000:
1.07 (a) arcsec 1.03 arcsec ... ... ... ... 100.5
[J2000]
25.0 mag arcsec^-2^ 4.77E+14 2.13 ... 0.96 0.04 0.04 15 101
[J2000]
6 r (SDSS Petrosian)
2007SDSS6.C...0000:
0.38 (a) arcsec ... ... ... 0.089 ... ... ... ... 4.77E+14 0.76 0.18 ... ... ... ... ...
7 r (SDSS deVaucouleurs)
2007SDSS6.C...0000:
0.0312 (a) arcsec ... ... 0.628 (b/a) 0.113 ... ... 103.0
[J2000]
... 4.77E+14 0.06 0.23 0.63 0.37 0.43 51 103
[J2000]
8 r (SDSS Exponential)
2007SDSS6.C...0000:
0.0508 (a) arcsec ... ... 0.776 (b/a) 0.133 ... ... 103.1
[J2000]
... 4.77E+14 0.10 0.27 0.78 0.22 0.25 39 103
[J2000]


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 1973UGC...C...0000N
Published Object Name         : UGC 07204                     
Frequency Targeted            : POSS1 103a-O                  
Major Axis (2a)               : 5.10       arcmin                   2a = 306.00 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : 2b =  0.80      arcmin              2b = 48.00 arcsec 
Uncertainty                   : ...                                 ...
Axis Ratio                    : ...                                 b/a = 0.16
Uncertainty                   : ...                                 ...
Ellipticity                   : ...                                 1 - b/a = 0.84
Uncertainty                   : ...                                 ...
Eccentricity                  : ...                                 [(a/b)2-1]/[(a/b)2+1] = 0.95
Uncertainty                   : ...                                 ...
Cos-1(b/a)                    : ...                                 81 deg
Position Angle [Equinox]      : 134    deg [B1950]                  134 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          : 120948.         +292900.    (B1950)
Qualifiers                    : From new, raw data
NED Comment                   :                                         

No. 2 Published Units: Homogenized Units: Reference Code : 1964MCG2..C...0000V Published Object Name : MCG +05-29-033 Frequency Targeted : POSS1 103a-O Major Axis (2a) : 4.50 arcmin 2a = 270.00 arcsec Uncertainty : ... ... Minor Axis (2b) : 2b = 0.50 arcmin 2b = 30.00 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.11 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.89 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.98 Uncertainty : ... ... Cos-1(b/a) : ... 84 deg Position Angle [Equinox] : ... ... Uncertainty : ... ... Significance : No uncertainty reported Diameter Reference Level : Low 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 : 120942 +2930 (B1950) Qualifiers : From new, raw data NED Comment :
No. 3 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : UGC 07204 Frequency Targeted : RC3 D_25, R_25 (blue) Major Axis (2a) : log(2a) + 1 = 1.70 2a = 300.70 arcsec Uncertainty : 0.02 14.20 arcsec Minor Axis (2b) : ... 2b = 43.60 arcsec Uncertainty : ... ... Axis Ratio : log(a/b) = 0.84 b/a = 0.14 Uncertainty : 0.04 0.01 Ellipticity : ... 1 - b/a = 0.85 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.96 Uncertainty : ... ... Cos-1(b/a) : ... 82 deg Position Angle [Equinox] : 134 deg [J2000] 134 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 : 121221.6 +291224. (J2000) Qualifiers : Homogenized from previously published data NED Comment :
No. 4 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : UGC 07204 Frequency Targeted : RC3 D_0 (blue) Major Axis (2a) : log(2a) + 1 = 1.70 2a = 300.70 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 : 121221.6 +291224. (J2000) Qualifiers : Homogenized from previously published data NED Comment : Extinction and inclination corrected.
No. 5 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J121221.45+291225.3 Frequency Targeted : r (SDSS Isophotal) Major Axis (2a) : a = 1.07 arcsec 2a = 2.13 arcsec Uncertainty : ... ... Minor Axis (2b) : b = 1.03 arcsec 2b = 2.05 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.96 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.04 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.04 Uncertainty : ... ... Cos-1(b/a) : ... 15 deg Position Angle [Equinox] : 100.5 deg [J2000] 101 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 : 183.0894007889 29.2070507288 (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 J121221.45+291225.3 Frequency Targeted : r (SDSS Petrosian) Major Axis (2a) : a = 0.38 arcsec 2a = 0.76 arcsec Uncertainty : 0.089 arcsec 0.18 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 : 183.0894007889 29.2070507288 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment :
No. 7 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J121221.45+291225.3 Frequency Targeted : r (SDSS deVaucouleurs) Major Axis (2a) : a = 0.0312 arcsec 2a = 0.06 arcsec Uncertainty : 0.113 arcsec 0.23 arcsec Minor Axis (2b) : ... 2b = 0.04 arcsec Uncertainty : ... 1.63 Axis Ratio : b/a = 0.628 b/a = 0.63 Uncertainty : 7.193 7.19 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] : 103.0 deg [J2000] 103 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 : 183.0894007889 29.2070507288 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment : Effective (half-light) radius
No. 8 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J121221.45+291225.3 Frequency Targeted : r (SDSS Exponential) Major Axis (2a) : a = 0.0508 arcsec 2a = 0.10 arcsec Uncertainty : 0.133 arcsec 0.27 arcsec Minor Axis (2b) : ... 2b = 0.08 arcsec Uncertainty : ... 1.43 Axis Ratio : b/a = 0.776 b/a = 0.78 Uncertainty : 5.368 5.37 Ellipticity : ... 1 - b/a = 0.22 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.25 Uncertainty : ... ... Cos-1(b/a) : ... 39 deg Position Angle [Equinox] : 103.1 deg [J2000] 103 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 : 183.0894007889 29.2070507288 (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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