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Date and Time of the Query: 2019-06-26 T12:39:29 PDT
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Diameter data point(s) for object NGC 4568

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 2.40 arcmin ... ... ... ... 23
[B1950]
About 25.0 B-mag arcsec^-2^ 7.40E+14 306.00 ... 0.47 0.53 0.64 62 23
[J2000]
2 POSS1 103a-O
1963MCG3..C...0000V
1.00 arcmin 0.60 arcmin ... ... ... ... ... High surface brightness 7.40E+14 60.00 ... 0.60 0.40 0.47 53 ...
3 POSS1 103a-O
1963MCG3..C...0000V
3.50 arcmin 1.50 arcmin ... ... ... ... ... Intermed. surface brightness 7.40E+14 210.00 ... 0.43 0.57 0.69 65 ...
4 RC3 D_25, R_25 (blue)
1991RC3.9.C...0000d
1.66 log(2a) + 1 ... ... 0.36
log(a/b)
0.01 ... ... 23
[J2000]
25.0 B-mag arcsec^-2^ 6.81E+14 274.30 6.40 0.44 0.56 0.68 64 23
[J2000]
5 RC3 D_0 (blue)
1991RC3.9.C...0000d
1.66 log(2a) + 1 ... ... ... ... ... ... ... 25.0 B-mag arcsec^-2^ 6.81E+14 274.30 ... ... ... ... ... ...
6 K_s (LGA/2MASS isophotal)
2003AJ....125..525J
104.8 (a) arcsec ... ... 0.390 (b/a) ... ... ... 28.0
[J2000]
20.0 K-mag arcsec^-2^ 1.38E+14 209.60 ... 0.39 0.61 0.74 67 28
[J2000]
7 K_s (LGA/2MASS "total")
2003AJ....125..525J
178.5 (a) arcsec ... ... 0.390 (b/a) ... ... ... 28.0
[J2000]
Diameter for "total" magnitude 1.38E+14 357.00 ... 0.39 0.61 0.74 67 28
[J2000]
8 r (SDSS Isophotal)
2005SDSS4.C...0000:
98.77 (a) arcsec 28.72 arcsec ... ... ... ... 29.1
[J2000]
25.0 mag arcsec^-2^ 4.77E+14 197.55 ... 0.29 0.71 0.84 73 29
[J2000]
9 r (SDSS Petrosian)
2005SDSS4.C...0000:
15.74 (a) arcsec ... ... ... 1.11 ... ... ... ... 4.77E+14 31.47 2.22 ... ... ... ... ...
10 r (SDSS de Vaucouleurs)
2005SDSS4.C...0000:
11.75 (a) arcsec ... ... 0.529 (b/a) 0.05 ... ... 26.9
[J2000]
... 4.77E+14 23.50 0.10 0.53 0.47 0.56 58 27
[J2000]
11 r (SDSS Exponential)
2005SDSS4.C...0000:
9.62 (a) arcsec ... ... 0.400 (b/a) 0.05 ... ... 26.6
[J2000]
... 4.77E+14 19.24 0.11 0.40 0.60 0.72 66 27
[J2000]


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 1973UGC...C...0000N
Published Object Name         : UGC 07776                     
Frequency Targeted            : POSS1 103a-O                  
Major Axis (2a)               : 5.10       arcmin                   2a = 306.00 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : 2b =  2.40      arcmin              2b = 144.00 arcsec 
Uncertainty                   : ...                                 ...
Axis Ratio                    : ...                                 b/a = 0.47
Uncertainty                   : ...                                 ...
Ellipticity                   : ...                                 1 - b/a = 0.53
Uncertainty                   : ...                                 ...
Eccentricity                  : ...                                 [(a/b)2-1]/[(a/b)2+1] = 0.64
Uncertainty                   : ...                                 ...
Cos-1(b/a)                    : ...                                 62 deg
Position Angle [Equinox]      :  23    deg [B1950]                  23 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          : 123400.         +113100.    (B1950)
Qualifiers                    : From new, raw data
NED Comment                   :                                         

No. 2 Published Units: Homogenized Units: Reference Code : 1963MCG3..C...0000V Published Object Name : MCG +02-32-152 Frequency Targeted : POSS1 103a-O Major Axis (2a) : 1.00 arcmin 2a = 60.00 arcsec Uncertainty : ... ... Minor Axis (2b) : 2b = 0.60 arcmin 2b = 36.00 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.60 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.40 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.47 Uncertainty : ... ... Cos-1(b/a) : ... 53 deg Position Angle [Equinox] : ... ... Uncertainty : ... ... Significance : No uncertainty reported Diameter Reference Level : 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 : 123400 +1131 (B1950) Qualifiers : From new, raw data NED Comment :
No. 3 Published Units: Homogenized Units: Reference Code : 1963MCG3..C...0000V Published Object Name : MCG +02-32-152 Frequency Targeted : POSS1 103a-O Major Axis (2a) : 3.50 arcmin 2a = 210.00 arcsec Uncertainty : ... ... Minor Axis (2b) : 2b = 1.50 arcmin 2b = 90.00 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.43 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.57 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.69 Uncertainty : ... ... Cos-1(b/a) : ... 65 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 : 123400 +1131 (B1950) Qualifiers : From new, raw data NED Comment :
No. 4 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : UGC 07776 Frequency Targeted : RC3 D_25, R_25 (blue) Major Axis (2a) : log(2a) + 1 = 1.66 2a = 274.30 arcsec Uncertainty : 0.01 6.40 arcsec Minor Axis (2b) : ... 2b = 119.87 arcsec Uncertainty : ... ... Axis Ratio : log(a/b) = 0.36 b/a = 0.44 Uncertainty : 0.02 0.02 Ellipticity : ... 1 - b/a = 0.56 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.68 Uncertainty : ... ... Cos-1(b/a) : ... 64 deg Position Angle [Equinox] : 23 deg [J2000] 23 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 : 123634.7 +111415. (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 07776 Frequency Targeted : RC3 D_0 (blue) Major Axis (2a) : log(2a) + 1 = 1.66 2a = 274.30 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 : 123634.7 +111415. (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 4568 Frequency Targeted : K_s (LGA/2MASS isophotal) Major Axis (2a) : a = 104.8 arcsec 2a = 209.60 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 81.74 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.390 b/a = 0.39 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.61 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.74 Uncertainty : ... ... Cos-1(b/a) : ... 67 deg Position Angle [Equinox] : 28.0 deg [J2000] 28 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 : 189.142883 11.238630 (J2000) Qualifiers : From new, raw data NED Comment :
No. 7 Published Units: Homogenized Units: Reference Code : 2003AJ....125..525J Published Object Name : NGC 4568 Frequency Targeted : K_s (LGA/2MASS "total") Major Axis (2a) : a = 178.5 arcsec 2a = 357.00 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 139.23 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.390 b/a = 0.39 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.61 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.74 Uncertainty : ... ... Cos-1(b/a) : ... 67 deg Position Angle [Equinox] : 28.0 deg [J2000] 28 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 : 189.142883 11.238630 (J2000) Qualifiers : From new, raw data NED Comment :
No. 8 Published Units: Homogenized Units: Reference Code : 2005SDSS4.C...0000: Published Object Name : SDSS J123634.26+111420.0 Frequency Targeted : r (SDSS Isophotal) Major Axis (2a) : a = 98.77 arcsec 2a = 197.55 arcsec Uncertainty : ... ... Minor Axis (2b) : b = 28.72 arcsec 2b = 57.44 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.29 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.71 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.84 Uncertainty : ... ... Cos-1(b/a) : ... 73 deg Position Angle [Equinox] : 29.1 deg [J2000] 29 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 : 189.1427612 11.2388754 (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 J123634.26+111420.0 Frequency Targeted : r (SDSS Petrosian) Major Axis (2a) : a = 15.74 arcsec 2a = 31.47 arcsec Uncertainty : 1.11 arcsec 2.22 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 : 189.1427612 11.2388754 (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 : 2005SDSS4.C...0000: Published Object Name : SDSS J123634.26+111420.0 Frequency Targeted : r (SDSS de Vaucouleurs) Major Axis (2a) : a = 11.75 arcsec 2a = 23.50 arcsec Uncertainty : 0.05 arcsec 0.10 arcsec Minor Axis (2b) : ... 2b = 12.43 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.529 b/a = 0.53 Uncertainty : 0.002 0.00 Ellipticity : ... 1 - b/a = 0.47 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.56 Uncertainty : ... ... Cos-1(b/a) : ... 58 deg Position Angle [Equinox] : 26.9 deg [J2000] 27 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 : 189.1427612 11.2388754 (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 : 2005SDSS4.C...0000: Published Object Name : SDSS J123634.26+111420.0 Frequency Targeted : r (SDSS Exponential) Major Axis (2a) : a = 9.62 arcsec 2a = 19.24 arcsec Uncertainty : 0.05 arcsec 0.11 arcsec Minor Axis (2b) : ... 2b = 7.70 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.400 b/a = 0.40 Uncertainty : 0.002 0.00 Ellipticity : ... 1 - b/a = 0.60 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.72 Uncertainty : ... ... Cos-1(b/a) : ... 66 deg Position Angle [Equinox] : 26.6 deg [J2000] 27 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 : 189.1427612 11.2388754 (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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