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Date and Time of the Query: 2019-04-22 T21:03:25 PDT
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Diameter data point(s) for object MESSIER 049

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
8.00 arcmin 7.00 arcmin ... ... ... ... 155
[B1950]
About 25.0 B-mag arcsec^-2^ 7.40E+14 480.00 ... 0.88 0.12 0.13 29 155
[J2000]
2 POSS1 103a-O
1963MCG3..C...0000V
2.20 arcmin 1.80 arcmin ... ... ... ... ... Very high surface brightness 7.40E+14 132.00 ... 0.82 0.18 0.20 35 ...
3 RC3 D_25, R_25 (blue)
1991RC3.9.C...0000d
2.01 log(2a) + 1 ... ... 0.09
log(a/b)
0.01 ... ... 155
[J2000]
25.0 B-mag arcsec^-2^ 6.81E+14 614.00 14.30 0.81 0.19 0.20 36 155
[J2000]
4 RC3 A_e (Johnson B)
1991RC3.9.C...0000d
1.54 log(2a) + 1 ... ... ... 0.02 ... ... ... ... 6.81E+14 208.00 9.80 ... ... ... ... ...
5 RC3 D_0 (blue)
1991RC3.9.C...0000d
1.99 log(2a) + 1 ... ... ... ... ... ... ... 25.0 B-mag arcsec^-2^ 6.81E+14 586.30 ... ... ... ... ... ...
6 K_s (LGA/2MASS isophotal)
2003AJ....125..525J
179.2 (a) arcsec ... ... 0.810 (b/a) ... ... ... -17.5
[J2000]
20.0 K-mag arcsec^-2^ 1.38E+14 358.40 ... 0.81 0.19 0.21 36 163
[J2000]
7 K_s (LGA/2MASS "total")
2003AJ....125..525J
313.4 (a) arcsec ... ... 0.810 (b/a) ... ... ... -17.5
[J2000]
Diameter for "total" magnitude 1.38E+14 626.80 ... 0.81 0.19 0.21 36 163
[J2000]
8 r (SDSS Isophotal)
2007SDSS6.C...0000:
42.49 (a) arcsec 36.47 arcsec ... ... ... ... 178.7
[J2000]
25.0 mag arcsec^-2^ 4.77E+14 84.97 ... 0.86 0.14 0.15 31 179
[J2000]
9 r (SDSS Petrosian)
2007SDSS6.C...0000:
11.67 (a) arcsec ... ... ... 0.179 ... ... ... ... 4.77E+14 23.34 0.36 ... ... ... ... ...
10 r (SDSS deVaucouleurs)
2007SDSS6.C...0000:
11.7497 (a) arcsec ... ... 0.399 (b/a) 0.079 ... ... 172.1
[J2000]
... 4.77E+14 23.50 0.16 0.40 0.60 0.73 66 172
[J2000]
11 r (SDSS Exponential)
2007SDSS6.C...0000:
5.3155 (a) arcsec ... ... 0.650 (b/a) 0.012 ... ... 171.8
[J2000]
... 4.77E+14 10.63 0.03 0.65 0.35 0.41 49 172
[J2000]


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 1973UGC...C...0000N
Published Object Name         : UGC 07629                     
Frequency Targeted            : POSS1 103a-O                  
Major Axis (2a)               : 8.00       arcmin                   2a = 480.00 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : 2b =  7.00      arcmin              2b = 420.00 arcsec 
Uncertainty                   : ...                                 ...
Axis Ratio                    : ...                                 b/a = 0.88
Uncertainty                   : ...                                 ...
Ellipticity                   : ...                                 1 - b/a = 0.12
Uncertainty                   : ...                                 ...
Eccentricity                  : ...                                 [(a/b)2-1]/[(a/b)2+1] = 0.13
Uncertainty                   : ...                                 ...
Cos-1(b/a)                    : ...                                 29 deg
Position Angle [Equinox]      : 155    deg [B1950]                  155 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          : 122712.         +081600.    (B1950)
Qualifiers                    : From new, raw data
NED Comment                   : Diameters flagged uncertain.            

No. 2 Published Units: Homogenized Units: Reference Code : 1963MCG3..C...0000V Published Object Name : MCG +01-32-083 Frequency Targeted : POSS1 103a-O Major Axis (2a) : 2.20 arcmin 2a = 132.00 arcsec Uncertainty : ... ... Minor Axis (2b) : 2b = 1.80 arcmin 2b = 108.00 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.82 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.18 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.20 Uncertainty : ... ... Cos-1(b/a) : ... 35 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 : 122712 +0816 (B1950) Qualifiers : From new, raw data NED Comment :
No. 3 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : UGC 07629 Frequency Targeted : RC3 D_25, R_25 (blue) Major Axis (2a) : log(2a) + 1 = 2.01 2a = 614.00 arcsec Uncertainty : 0.01 14.30 arcsec Minor Axis (2b) : ... 2b = 499.18 arcsec Uncertainty : ... ... Axis Ratio : log(a/b) = 0.09 b/a = 0.81 Uncertainty : 0.01 0.02 Ellipticity : ... 1 - b/a = 0.19 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.20 Uncertainty : ... ... Cos-1(b/a) : ... 36 deg Position Angle [Equinox] : 155 deg [J2000] 155 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 : 122946.5 +075958. (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 07629 Frequency Targeted : RC3 A_e (Johnson B) Major Axis (2a) : log(2a) + 1 = 1.54 2a = 208.00 arcsec Uncertainty : 0.02 9.80 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 : 122946.5 +075958. (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 07629 Frequency Targeted : RC3 D_0 (blue) Major Axis (2a) : log(2a) + 1 = 1.99 2a = 586.30 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 : 122946.5 +075958. (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 049 Frequency Targeted : K_s (LGA/2MASS isophotal) Major Axis (2a) : a = 179.2 arcsec 2a = 358.40 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 290.30 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.810 b/a = 0.81 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.19 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.21 Uncertainty : ... ... Cos-1(b/a) : ... 36 deg Position Angle [Equinox] : -17.5 deg [J2000] 163 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 : 187.444992 8.000410 (J2000) Qualifiers : From new, raw data NED Comment :
No. 7 Published Units: Homogenized Units: Reference Code : 2003AJ....125..525J Published Object Name : MESSIER 049 Frequency Targeted : K_s (LGA/2MASS "total") Major Axis (2a) : a = 313.4 arcsec 2a = 626.80 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 507.71 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.810 b/a = 0.81 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.19 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.21 Uncertainty : ... ... Cos-1(b/a) : ... 36 deg Position Angle [Equinox] : -17.5 deg [J2000] 163 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 : 187.444992 8.000410 (J2000) Qualifiers : From new, raw data NED Comment :
No. 8 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J122946.76+080001.7 Frequency Targeted : r (SDSS Isophotal) Major Axis (2a) : a = 42.49 arcsec 2a = 84.97 arcsec Uncertainty : ... ... Minor Axis (2b) : b = 36.47 arcsec 2b = 72.93 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.86 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.14 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.15 Uncertainty : ... ... Cos-1(b/a) : ... 31 deg Position Angle [Equinox] : 178.7 deg [J2000] 179 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 : 187.4448475045 8.0004819451 (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 J122946.76+080001.7 Frequency Targeted : r (SDSS Petrosian) Major Axis (2a) : a = 11.67 arcsec 2a = 23.34 arcsec Uncertainty : 0.179 arcsec 0.36 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 : 187.4448475045 8.0004819451 (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 J122946.76+080001.7 Frequency Targeted : r (SDSS deVaucouleurs) Major Axis (2a) : a = 11.7497 arcsec 2a = 23.50 arcsec Uncertainty : 0.079 arcsec 0.16 arcsec Minor Axis (2b) : ... 2b = 9.38 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.399 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] = 0.73 Uncertainty : ... ... Cos-1(b/a) : ... 66 deg Position Angle [Equinox] : 172.1 deg [J2000] 172 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 : 187.4448475045 8.0004819451 (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 J122946.76+080001.7 Frequency Targeted : r (SDSS Exponential) Major Axis (2a) : a = 5.3155 arcsec 2a = 10.63 arcsec Uncertainty : 0.012 arcsec 0.03 arcsec Minor Axis (2b) : ... 2b = 6.91 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.650 b/a = 0.65 Uncertainty : 0.002 0.00 Ellipticity : ... 1 - b/a = 0.35 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.41 Uncertainty : ... ... Cos-1(b/a) : ... 49 deg Position Angle [Equinox] : 171.8 deg [J2000] 172 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 : 187.4448475045 8.0004819451 (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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