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Date and Time of the Query: 2019-05-21 T10:54:07 PDT
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Diameter data point(s) for object MESSIER 031

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
200.00 arcmin 80.00 arcmin ... ... ... ... 35
[B1950]
About 25.0 B-mag arcsec^-2^ 7.40E+14 12000.00 ... 0.40 0.60 0.72 66 35
[J2000]
2 POSS1 103a-O
1964MCG2..C...0000V
50.00 arcmin 18.00 arcmin ... ... ... ... ... Very high surface brightness 7.40E+14 3000.00 ... 0.36 0.64 0.77 69 ...
3 RC3 D_25, R_25 (blue)
1991RC3.9.C...0000d
3.28 log(2a) + 1 ... ... 0.49
log(a/b)
0.01 ... ... 35
[J2000]
25.0 B-mag arcsec^-2^ 6.81E+14 11432.80 266.30 0.32 0.68 0.81 71 35
[J2000]
4 RC3 A_e (Johnson B)
1991RC3.9.C...0000d
2.62 log(2a) + 1 ... ... ... 0.02 ... ... ... ... 6.81E+14 2501.20 117.90 ... ... ... ... ...
5 RC3 D_0 (blue)
1991RC3.9.C...0000d
3.31 log(2a) + 1 ... ... ... ... ... ... ... 25.0 B-mag arcsec^-2^ 6.81E+14 12250.40 ... ... ... ... ... ...
6 K_s (LGA/2MASS isophotal)
2003AJ....125..525J
1614.7 (a) arcsec ... ... 0.561 (b/a) ... ... ... 45.0
[J2000]
20.0 K-mag arcsec^-2^ 1.38E+14 3229.40 ... 0.56 0.44 0.52 56 45
[J2000]
7 K_s (LGA/2MASS "total")
2003AJ....125..525J
3100.0 (a) arcsec ... ... 0.561 (b/a) ... ... ... 45.0
[J2000]
Diameter for "total" magnitude 1.38E+14 6200.00 ... 0.56 0.44 0.52 56 45
[J2000]


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 1973UGC...C...0000N
Published Object Name         : UGC 00454                     
Frequency Targeted            : POSS1 103a-O                  
Major Axis (2a)               : 200.00     arcmin                   2a = 12000.00 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : 2b = 80.00      arcmin              2b = 4800.00 arcsec 
Uncertainty                   : ...                                 ...
Axis Ratio                    : ...                                 b/a = 0.40
Uncertainty                   : ...                                 ...
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]      :  35    deg [B1950]                  35 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          : 004000.         +410000.    (B1950)
Qualifiers                    : From new, raw data
NED Comment                   : Minor diameter flagged uncertain.       

No. 2 Published Units: Homogenized Units: Reference Code : 1964MCG2..C...0000V Published Object Name : MCG +07-02-016 Frequency Targeted : POSS1 103a-O Major Axis (2a) : 50.00 arcmin 2a = 3000.00 arcsec Uncertainty : ... ... Minor Axis (2b) : 2b = 18.00 arcmin 2b = 1080.00 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.36 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.64 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.77 Uncertainty : ... ... Cos-1(b/a) : ... 69 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 : 004000 +4100 (B1950) Qualifiers : Uncertain origin NED Comment :
No. 3 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : UGC 00454 Frequency Targeted : RC3 D_25, R_25 (blue) Major Axis (2a) : log(2a) + 1 = 3.28 2a = 11432.80 arcsec Uncertainty : 0.01 266.30 arcsec Minor Axis (2b) : ... 2b = 3704.23 arcsec Uncertainty : ... ... Axis Ratio : log(a/b) = 0.49 b/a = 0.32 Uncertainty : 0.02 0.01 Ellipticity : ... 1 - b/a = 0.68 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.81 Uncertainty : ... ... Cos-1(b/a) : ... 71 deg Position Angle [Equinox] : 35 deg [J2000] 35 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 : 004244.4 +411608. (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 00454 Frequency Targeted : RC3 A_e (Johnson B) Major Axis (2a) : log(2a) + 1 = 2.62 2a = 2501.20 arcsec Uncertainty : 0.02 117.90 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 : 004244.4 +411608. (J2000) Qualifiers : From new, raw data NED Comment : From magnitude-aperture curves.
No. 5 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : UGC 00454 Frequency Targeted : RC3 D_0 (blue) Major Axis (2a) : log(2a) + 1 = 3.31 2a = 12250.40 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 : 004244.4 +411608. (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 : MESSIER 031 Frequency Targeted : K_s (LGA/2MASS isophotal) Major Axis (2a) : a = 1614.7 arcsec 2a = 3229.40 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 1811.69 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.561 b/a = 0.56 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.44 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.52 Uncertainty : ... ... Cos-1(b/a) : ... 56 deg Position Angle [Equinox] : 45.0 deg [J2000] 45 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 : 10.684710 41.268749 (J2000) Qualifiers : From new, raw data NED Comment :
No. 7 Published Units: Homogenized Units: Reference Code : 2003AJ....125..525J Published Object Name : MESSIER 031 Frequency Targeted : K_s (LGA/2MASS "total") Major Axis (2a) : a = 3100.0 arcsec 2a = 6200.00 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 3478.20 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.561 b/a = 0.56 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.44 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.52 Uncertainty : ... ... Cos-1(b/a) : ... 56 deg Position Angle [Equinox] : 45.0 deg [J2000] 45 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 : 10.684710 41.268749 (J2000) Qualifiers : From new, raw data NED Comment :

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