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Date and Time of the Query: 2019-03-19 T18:53:51 PDT
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Diameter data point(s) for object MESSIER 051b

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
7.00 arcmin 5.00 arcmin ... ... ... ... ... About 25.0 B-mag arcsec^-2^ 7.40E+14 420.00 ... 0.71 0.29 0.32 44 ...
2 POSS1 103a-O
1962MCG1..C...0000V
1.80 arcmin 1.20 arcmin ... ... ... ... ... Very high surface brightness 7.40E+14 108.00 ... 0.67 0.33 0.38 48 ...
3 POSS1 103a-O
1962MCG1..C...0000V
4.50 arcmin 3.50 arcmin ... ... ... ... ... Very low surface brightness 7.40E+14 270.00 ... 0.78 0.22 0.25 39 ...
4 RC3 D_25, R_25 (blue)
1991RC3.9.C...0000d
1.76 log(2a) + 1 ... ... 0.10
log(a/b)
0.02 ... ... 79
[J2000]
25.0 B-mag arcsec^-2^ 6.81E+14 345.30 16.30 0.79 0.21 0.23 37 79
[J2000]
5 RC3 A_e (Johnson B)
1991RC3.9.C...0000d
1.28 log(2a) + 1 ... ... ... 0.01 ... ... ... ... 6.81E+14 114.30 2.70 ... ... ... ... ...
6 RC3 D_0 (blue)
1991RC3.9.C...0000d
1.76 log(2a) + 1 ... ... ... ... ... ... ... 25.0 B-mag arcsec^-2^ 6.81E+14 345.30 ... ... ... ... ... ...
7 K_s (LGA/2MASS isophotal)
2003AJ....125..525J
124.2 (a) arcsec ... ... 0.990 (b/a) ... ... ... 27.5
[J2000]
20.0 K-mag arcsec^-2^ 1.38E+14 248.40 ... 0.99 0.01 0.01 8 28
[J2000]
8 K_s (LGA/2MASS "total")
2003AJ....125..525J
260.5 (a) arcsec ... ... 0.990 (b/a) ... ... ... 27.5
[J2000]
Diameter for "total" magnitude 1.38E+14 521.00 ... 0.99 0.01 0.01 8 28
[J2000]


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 1973UGC...C...0000N
Published Object Name         : UGC 08494                     
Frequency Targeted            : POSS1 103a-O                  
Major Axis (2a)               : 7.00       arcmin                   2a = 420.00 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : 2b =  5.00      arcmin              2b = 300.00 arcsec 
Uncertainty                   : ...                                 ...
Axis Ratio                    : ...                                 b/a = 0.71
Uncertainty                   : ...                                 ...
Ellipticity                   : ...                                 1 - b/a = 0.29
Uncertainty                   : ...                                 ...
Eccentricity                  : ...                                 [(a/b)2-1]/[(a/b)2+1] = 0.32
Uncertainty                   : ...                                 ...
Cos-1(b/a)                    : ...                                 44 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          : 132754.         +473100.    (B1950)
Qualifiers                    : From new, raw data
NED Comment                   : Diameters flagged uncertain.            

No. 2 Published Units: Homogenized Units: Reference Code : 1962MCG1..C...0000V Published Object Name : MCG +08-25-014 Frequency Targeted : POSS1 103a-O Major Axis (2a) : 1.80 arcmin 2a = 108.00 arcsec Uncertainty : ... ... Minor Axis (2b) : 2b = 1.20 arcmin 2b = 72.00 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.67 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.33 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.38 Uncertainty : ... ... Cos-1(b/a) : ... 48 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 : 132754 +4732 (B1950) Qualifiers : From new, raw data NED Comment :
No. 3 Published Units: Homogenized Units: Reference Code : 1962MCG1..C...0000V Published Object Name : MCG +08-25-014 Frequency Targeted : POSS1 103a-O Major Axis (2a) : 4.50 arcmin 2a = 270.00 arcsec Uncertainty : ... ... Minor Axis (2b) : 2b = 3.50 arcmin 2b = 210.00 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.78 Uncertainty : ... ... 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] : ... ... Uncertainty : ... ... Significance : No uncertainty reported Diameter Reference Level : Very 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 : 132754 +4732 (B1950) Qualifiers : From new, raw data NED Comment :
No. 4 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : UGC 08494 Frequency Targeted : RC3 D_25, R_25 (blue) Major Axis (2a) : log(2a) + 1 = 1.76 2a = 345.30 arcsec Uncertainty : 0.02 16.30 arcsec Minor Axis (2b) : ... 2b = 274.17 arcsec Uncertainty : ... ... Axis Ratio : log(a/b) = 0.10 b/a = 0.79 Uncertainty : 0.03 0.06 Ellipticity : ... 1 - b/a = 0.21 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.23 Uncertainty : ... ... Cos-1(b/a) : ... 37 deg Position Angle [Equinox] : 79 deg [J2000] 79 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 : 132958.7 +471621. (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 08494 Frequency Targeted : RC3 A_e (Johnson B) Major Axis (2a) : log(2a) + 1 = 1.28 2a = 114.30 arcsec Uncertainty : 0.01 2.70 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 : 132958.7 +471621. (J2000) Qualifiers : From new, raw data NED Comment : From magnitude-aperture curves.
No. 6 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : UGC 08494 Frequency Targeted : RC3 D_0 (blue) Major Axis (2a) : log(2a) + 1 = 1.76 2a = 345.30 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 : 132958.7 +471621. (J2000) Qualifiers : Homogenized from previously published data NED Comment : Extinction and inclination corrected.
No. 7 Published Units: Homogenized Units: Reference Code : 2003AJ....125..525J Published Object Name : MESSIER 051B Frequency Targeted : K_s (LGA/2MASS isophotal) Major Axis (2a) : a = 124.2 arcsec 2a = 248.40 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 245.92 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.990 b/a = 0.99 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.01 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.01 Uncertainty : ... ... Cos-1(b/a) : ... 8 deg Position Angle [Equinox] : 27.5 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 : 202.498291 47.266129 (J2000) Qualifiers : From new, raw data NED Comment :
No. 8 Published Units: Homogenized Units: Reference Code : 2003AJ....125..525J Published Object Name : MESSIER 051B Frequency Targeted : K_s (LGA/2MASS "total") Major Axis (2a) : a = 260.5 arcsec 2a = 521.00 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 515.79 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.990 b/a = 0.99 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.01 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.01 Uncertainty : ... ... Cos-1(b/a) : ... 8 deg Position Angle [Equinox] : 27.5 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 : 202.498291 47.266129 (J2000) Qualifiers : From new, raw data NED Comment :

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