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Date and Time of the Query: 2019-07-20 T00:23:51 PDT
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Diameter data point(s) for object NGC 4874

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
2.40 arcmin 2.40 arcmin ... ... ... ... ... About 25.0 B-mag arcsec^-2^ 7.40E+14 144.00 ... 1.00 0.00 0.00 0 ...
2 K_s (2MASS isophotal)
20032MASX.C.......:
50.1 (a) arcsec ... ... 0.940 (b/a) ... ... ... 55
[J2000]
20.0 K-mag arcsec^-2^ 1.38E+14 100.20 ... 0.94 0.06 0.06 20 55
[J2000]
3 K_s (2MASS "total")
20032MASX.C.......:
74.7 (a) arcsec ... ... 0.940 (b/a) ... ... ... 55
[J2000]
Diameter for "total" magnitude 1.38E+14 149.40 ... 0.94 0.06 0.06 20 55
[J2000]
4 POSS1 103a-O
1964MCG2..C...0000V
0.45 arcmin 0.45 arcmin ... ... ... ... ... Very high surface brightness 7.40E+14 27.00 ... 1.00 0.00 0.00 0 ...
5 RC3 D_25, R_25 (blue)
1991RC3.9.C...0000d
1.29 log(2a) + 1 ... ... 0.00
log(a/b)
0.09 ... ... ... 25.0 B-mag arcsec^-2^ 6.81E+14 117.00 26.90 1.00 0.00 0.00 0 ...
6 RC3 A_e (Johnson B)
1991RC3.9.C...0000d
1.13 log(2a) + 1 ... ... ... 0.05 ... ... ... ... 6.81E+14 80.90 9.90 ... ... ... ... ...
7 RC3 D_0 (blue)
1991RC3.9.C...0000d
1.30 log(2a) + 1 ... ... ... ... ... ... ... 25.0 B-mag arcsec^-2^ 6.81E+14 119.70 ... ... ... ... ... ...
8 r (SDSS Isophotal)
2007SDSS6.C...0000:
56.67 (a) arcsec 48.25 arcsec ... ... ... ... 31.6
[J2000]
25.0 mag arcsec^-2^ 4.77E+14 113.33 ... 0.85 0.15 0.16 32 32
[J2000]
9 r (SDSS Petrosian)
2007SDSS6.C...0000:
14.91 (a) arcsec ... ... ... 0.139 ... ... ... ... 4.77E+14 29.82 0.28 ... ... ... ... ...
10 r (SDSS deVaucouleurs)
2007SDSS6.C...0000:
11.7546 (a) arcsec ... ... 0.928 (b/a) 0.073 ... ... 40.2
[J2000]
... 4.77E+14 23.51 0.14 0.93 0.07 0.07 22 40
[J2000]
11 r (SDSS Exponential)
2007SDSS6.C...0000:
4.5949 (a) arcsec ... ... 0.970 (b/a) 0.015 ... ... 44.3
[J2000]
... 4.77E+14 9.19 0.03 0.97 0.03 0.03 14 44
[J2000]


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 1973UGC...C...0000N
Published Object Name         : UGC 08103                     
Frequency Targeted            : POSS1 103a-O                  
Major Axis (2a)               : 2.40       arcmin                   2a = 144.00 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : 2b =  2.40      arcmin              2b = 144.00 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          : 125712.         +281400.    (B1950)
Qualifiers                    : From new, raw data
NED Comment                   : Diameters flagged uncertain.            

No. 2 Published Units: Homogenized Units: Reference Code : 20032MASX.C.......: Published Object Name : 2MASX J12593570+2757338 Frequency Targeted : K_s (2MASS isophotal) Major Axis (2a) : a = 50.1 arcsec 2a = 100.20 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 94.19 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.940 b/a = 0.94 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.06 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.06 Uncertainty : ... ... Cos-1(b/a) : ... 20 deg Position Angle [Equinox] : 55 deg [J2000] 55 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 : 194.898773 27.959375 (J2000) Qualifiers : From new, raw data NED Comment :
No. 3 Published Units: Homogenized Units: Reference Code : 20032MASX.C.......: Published Object Name : 2MASX J12593570+2757338 Frequency Targeted : K_s (2MASS "total") Major Axis (2a) : a = 74.7 arcsec 2a = 149.40 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 140.44 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.940 b/a = 0.94 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.06 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.06 Uncertainty : ... ... Cos-1(b/a) : ... 20 deg Position Angle [Equinox] : 55 deg [J2000] 55 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 : 194.898773 27.959375 (J2000) Qualifiers : From new, raw data NED Comment :
No. 4 Published Units: Homogenized Units: Reference Code : 1964MCG2..C...0000V Published Object Name : MCG +05-31-070 Frequency Targeted : POSS1 103a-O Major Axis (2a) : 0.45 arcmin 2a = 27.00 arcsec Uncertainty : ... ... Minor Axis (2b) : 2b = 0.45 arcmin 2b = 27.00 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 : 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 : 125712 +2814 (B1950) Qualifiers : From new, raw data NED Comment :
No. 5 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : UGC 08103 Frequency Targeted : RC3 D_25, R_25 (blue) Major Axis (2a) : log(2a) + 1 = 1.29 2a = 117.00 arcsec Uncertainty : 0.09 26.90 arcsec Minor Axis (2b) : ... 2b = 117.00 arcsec Uncertainty : ... ... Axis Ratio : log(a/b) = 0.00 b/a = 1.00 Uncertainty : 0.07 0.17 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 : 125935.3 +275736. (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 08103 Frequency Targeted : RC3 A_e (Johnson B) Major Axis (2a) : log(2a) + 1 = 1.13 2a = 80.90 arcsec Uncertainty : 0.05 9.90 arcsec Minor Axis (2b) : ... ... Uncertainty : ... ... Axis Ratio : ... ... Uncertainty : ... ... Ellipticity : ... ... Uncertainty : ... ... Eccentricity : ... ... Uncertainty : ... ... Cos-1(b/a) : ... ... Position Angle [Equinox] : ... ... Uncertainty : ... ... Significance : Mean error Diameter Reference Level : ... 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 : 125935.3 +275736. (J2000) Qualifiers : From new, raw data NED Comment : From magnitude-aperture curves.
No. 7 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : UGC 08103 Frequency Targeted : RC3 D_0 (blue) Major Axis (2a) : log(2a) + 1 = 1.30 2a = 119.70 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 : 125935.3 +275736. (J2000) Qualifiers : Homogenized from previously published data NED Comment : Extinction and inclination corrected.
No. 8 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J125935.70+275733.3 Frequency Targeted : r (SDSS Isophotal) Major Axis (2a) : a = 56.67 arcsec 2a = 113.33 arcsec Uncertainty : ... ... Minor Axis (2b) : b = 48.25 arcsec 2b = 96.49 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.85 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.15 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.16 Uncertainty : ... ... Cos-1(b/a) : ... 32 deg Position Angle [Equinox] : 31.6 deg [J2000] 32 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 : 194.8987792871 27.9592681458 (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 : 2007SDSS6.C...0000: Published Object Name : SDSS J125935.70+275733.3 Frequency Targeted : r (SDSS Petrosian) Major Axis (2a) : a = 14.91 arcsec 2a = 29.82 arcsec Uncertainty : 0.139 arcsec 0.28 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 : 194.8987792871 27.9592681458 (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 : 2007SDSS6.C...0000: Published Object Name : SDSS J125935.70+275733.3 Frequency Targeted : r (SDSS deVaucouleurs) Major Axis (2a) : a = 11.7546 arcsec 2a = 23.51 arcsec Uncertainty : 0.073 arcsec 0.14 arcsec Minor Axis (2b) : ... 2b = 21.82 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.928 b/a = 0.93 Uncertainty : 0.004 0.00 Ellipticity : ... 1 - b/a = 0.07 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.07 Uncertainty : ... ... Cos-1(b/a) : ... 22 deg Position Angle [Equinox] : 40.2 deg [J2000] 40 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 : 194.8987792871 27.9592681458 (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 J125935.70+275733.3 Frequency Targeted : r (SDSS Exponential) Major Axis (2a) : a = 4.5949 arcsec 2a = 9.19 arcsec Uncertainty : 0.015 arcsec 0.03 arcsec Minor Axis (2b) : ... 2b = 8.91 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.970 b/a = 0.97 Uncertainty : 0.004 0.00 Ellipticity : ... 1 - b/a = 0.03 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.03 Uncertainty : ... ... Cos-1(b/a) : ... 14 deg Position Angle [Equinox] : 44.3 deg [J2000] 44 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 : 194.8987792871 27.9592681458 (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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