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Date and Time of the Query: 2019-06-27 T06:15:12 PDT
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Diameter data point(s) for object NGC 5021

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
1.60 arcmin 0.70 arcmin ... ... ... ... 78
[B1950]
About 25.0 B-mag arcsec^-2^ 7.40E+14 96.00 ... 0.44 0.56 0.68 64 78
[J2000]
2 K_s (2MASS isophotal)
20032MASX.C.......:
37.5 (a) arcsec ... ... 0.500 (b/a) ... ... ... 85
[J2000]
20.0 K-mag arcsec^-2^ 1.38E+14 75.00 ... 0.50 0.50 0.60 60 85
[J2000]
3 K_s (2MASS isophotal)
20032MASX.C.......:
20.4 (a) arcsec ... ... 0.740 (b/a) ... ... ... 80
[J2000]
20.0 K-mag arcsec^-2^ 1.38E+14 40.80 ... 0.74 0.26 0.29 42 80
[J2000]
4 K_s (2MASS "total")
20032MASX.C.......:
70.9 (a) arcsec ... ... 0.500 (b/a) ... ... ... 85
[J2000]
Diameter for "total" magnitude 1.38E+14 141.90 ... 0.50 0.50 0.60 60 85
[J2000]
5 K_s (2MASS "total")
20032MASX.C.......:
48.8 (a) arcsec ... ... 0.740 (b/a) ... ... ... 80
[J2000]
Diameter for "total" magnitude 1.38E+14 97.70 ... 0.74 0.26 0.29 42 80
[J2000]
6 POSS1 103a-O
1962MCG1..C...0000V
0.80 arcmin 0.50 arcmin ... ... ... ... ... High surface brightness 7.40E+14 48.00 ... 0.62 0.38 0.44 51 ...
7 POSS1 103a-O
1962MCG1..C...0000V
1.50 arcmin 0.70 arcmin ... ... ... ... ... Intermed. surface brightness 7.40E+14 90.00 ... 0.47 0.53 0.64 62 ...
8 RC3 D_25, R_25 (blue)
1991RC3.9.C...0000d
1.19 log(2a) + 1 ... ... 0.33
log(a/b)
0.05 ... ... 78
[J2000]
25.0 B-mag arcsec^-2^ 6.81E+14 92.90 11.30 0.47 0.53 0.64 62 78
[J2000]
9 RC3 D_0 (blue)
1991RC3.9.C...0000d
1.19 log(2a) + 1 ... ... ... ... ... ... ... 25.0 B-mag arcsec^-2^ 6.81E+14 92.90 ... ... ... ... ... ...
10 r (SDSS Petrosian)
2005SDSS4.C...0000:
8.77 (a) arcsec ... ... ... 0.32 ... ... ... ... 4.77E+14 17.55 0.65 ... ... ... ... ...
11 r (SDSS de Vaucouleurs)
2005SDSS4.C...0000:
11.42 (a) arcsec ... ... 0.555 (b/a) 0.09 ... ... 73.9
[J2000]
... 4.77E+14 22.84 0.18 0.56 0.44 0.53 56 74
[J2000]
12 r (SDSS Exponential)
2005SDSS4.C...0000:
4.39 (a) arcsec ... ... 0.662 (b/a) 0.02 ... ... 73.1
[J2000]
... 4.77E+14 8.78 0.03 0.66 0.34 0.39 49 73
[J2000]


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 1973UGC...C...0000N
Published Object Name         : UGC 08284                     
Frequency Targeted            : POSS1 103a-O                  
Major Axis (2a)               : 1.60       arcmin                   2a = 96.00 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : 2b =  0.70      arcmin              2b = 42.00 arcsec 
Uncertainty                   : ...                                 ...
Axis Ratio                    : ...                                 b/a = 0.44
Uncertainty                   : ...                                 ...
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]      :  78    deg [B1950]                  78 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          : 130954.         +462800.    (B1950)
Qualifiers                    : From new, raw data
NED Comment                   :                                         

No. 2 Published Units: Homogenized Units: Reference Code : 20032MASX.C.......: Published Object Name : 2MASX J13120529+4611469 Frequency Targeted : K_s (2MASS isophotal) Major Axis (2a) : a = 37.5 arcsec 2a = 75.00 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 37.50 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.500 b/a = 0.50 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.50 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.60 Uncertainty : ... ... Cos-1(b/a) : ... 60 deg Position Angle [Equinox] : 85 deg [J2000] 85 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 : 198.022232 46.196266 (J2000) Qualifiers : From new, raw data NED Comment :
No. 3 Published Units: Homogenized Units: Reference Code : 20032MASX.C.......: Published Object Name : 2MASX J13120625+4611458 Frequency Targeted : K_s (2MASS isophotal) Major Axis (2a) : a = 20.4 arcsec 2a = 40.80 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 30.19 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.740 b/a = 0.74 Uncertainty : ... ... 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] : 80 deg [J2000] 80 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 : 198.026077 46.196075 (J2000) Qualifiers : From new, raw data NED Comment :
No. 4 Published Units: Homogenized Units: Reference Code : 20032MASX.C.......: Published Object Name : 2MASX J13120529+4611469 Frequency Targeted : K_s (2MASS "total") Major Axis (2a) : a = 70.9 arcsec 2a = 141.90 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 70.95 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.500 b/a = 0.50 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.50 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.60 Uncertainty : ... ... Cos-1(b/a) : ... 60 deg Position Angle [Equinox] : 85 deg [J2000] 85 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 : 198.022232 46.196266 (J2000) Qualifiers : From new, raw data NED Comment :
No. 5 Published Units: Homogenized Units: Reference Code : 20032MASX.C.......: Published Object Name : 2MASX J13120625+4611458 Frequency Targeted : K_s (2MASS "total") Major Axis (2a) : a = 48.8 arcsec 2a = 97.70 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 72.30 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.740 b/a = 0.74 Uncertainty : ... ... 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] : 80 deg [J2000] 80 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 : 198.026077 46.196075 (J2000) Qualifiers : From new, raw data NED Comment :
No. 6 Published Units: Homogenized Units: Reference Code : 1962MCG1..C...0000V Published Object Name : MCG +08-24-084 Frequency Targeted : POSS1 103a-O Major Axis (2a) : 0.80 arcmin 2a = 48.00 arcsec Uncertainty : ... ... Minor Axis (2b) : 2b = 0.50 arcmin 2b = 30.00 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.62 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.38 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.44 Uncertainty : ... ... Cos-1(b/a) : ... 51 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 : 131000 +4628 (B1950) Qualifiers : From new, raw data NED Comment :
No. 7 Published Units: Homogenized Units: Reference Code : 1962MCG1..C...0000V Published Object Name : MCG +08-24-084 Frequency Targeted : POSS1 103a-O Major Axis (2a) : 1.50 arcmin 2a = 90.00 arcsec Uncertainty : ... ... Minor Axis (2b) : 2b = 0.70 arcmin 2b = 42.00 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] : ... ... 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 : 131000 +4628 (B1950) Qualifiers : From new, raw data NED Comment :
No. 8 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : UGC 08284 Frequency Targeted : RC3 D_25, R_25 (blue) Major Axis (2a) : log(2a) + 1 = 1.19 2a = 92.90 arcsec Uncertainty : 0.05 11.30 arcsec Minor Axis (2b) : ... 2b = 43.48 arcsec Uncertainty : ... ... Axis Ratio : log(a/b) = 0.33 b/a = 0.47 Uncertainty : 0.05 0.06 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] : 78 deg [J2000] 78 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 : 131206.5 +461146. (J2000) Qualifiers : Homogenized from previously published data NED Comment :
No. 9 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : UGC 08284 Frequency Targeted : RC3 D_0 (blue) Major Axis (2a) : log(2a) + 1 = 1.19 2a = 92.90 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 : 131206.5 +461146. (J2000) Qualifiers : Homogenized from previously published data NED Comment : Extinction and inclination corrected.
No. 10 Published Units: Homogenized Units: Reference Code : 2005SDSS4.C...0000: Published Object Name : SDSS J131206.27+461146.1 Frequency Targeted : r (SDSS Petrosian) Major Axis (2a) : a = 8.77 arcsec 2a = 17.55 arcsec Uncertainty : 0.32 arcsec 0.65 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 : 198.0261383 46.1961517 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment :
No. 11 Published Units: Homogenized Units: Reference Code : 2005SDSS4.C...0000: Published Object Name : SDSS J131206.27+461146.1 Frequency Targeted : r (SDSS de Vaucouleurs) Major Axis (2a) : a = 11.42 arcsec 2a = 22.84 arcsec Uncertainty : 0.09 arcsec 0.18 arcsec Minor Axis (2b) : ... 2b = 12.68 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.555 b/a = 0.56 Uncertainty : 0.003 0.00 Ellipticity : ... 1 - b/a = 0.44 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.53 Uncertainty : ... ... Cos-1(b/a) : ... 56 deg Position Angle [Equinox] : 73.9 deg [J2000] 74 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 : 198.0261383 46.1961517 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment : Effective (half-light) radius
No. 12 Published Units: Homogenized Units: Reference Code : 2005SDSS4.C...0000: Published Object Name : SDSS J131206.27+461146.1 Frequency Targeted : r (SDSS Exponential) Major Axis (2a) : a = 4.39 arcsec 2a = 8.78 arcsec Uncertainty : 0.02 arcsec 0.03 arcsec Minor Axis (2b) : ... 2b = 5.81 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.662 b/a = 0.66 Uncertainty : 0.003 0.00 Ellipticity : ... 1 - b/a = 0.34 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.39 Uncertainty : ... ... Cos-1(b/a) : ... 49 deg Position Angle [Equinox] : 73.1 deg [J2000] 73 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 : 198.0261383 46.1961517 (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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