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Date and Time of the Query: 2019-05-21 T06:40:49 PDT
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Diameter data point(s) for object MESSIER 099

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
5.00 arcmin 4.70 arcmin ... ... ... ... ... About 25.0 B-mag arcsec^-2^ 7.40E+14 300.00 ... 0.94 0.06 0.06 20 ...
2 POSS1 103a-O
1964MCG2..C...0000V
1.60 arcmin 1.20 arcmin ... ... ... ... ... Very high surface brightness 7.40E+14 96.00 ... 0.75 0.25 0.28 41 ...
3 POSS1 103a-O
1964MCG2..C...0000V
6.00 arcmin 5.00 arcmin ... ... ... ... ... Very high surface brightness 7.40E+14 360.00 ... 0.83 0.17 0.18 34 ...
4 RC3 D_25, R_25 (blue)
1991RC3.9.C...0000d
1.73 log(2a) + 1 ... ... 0.06
log(a/b)
0.01 ... ... ... 25.0 B-mag arcsec^-2^ 6.81E+14 322.20 7.50 0.87 0.13 0.14 29 ...
5 RC3 A_e (Johnson B)
1991RC3.9.C...0000d
1.27 log(2a) + 1 ... ... ... 0.01 ... ... ... ... 6.81E+14 111.70 2.60 ... ... ... ... ...
6 RC3 D_0 (blue)
1991RC3.9.C...0000d
1.75 log(2a) + 1 ... ... ... ... ... ... ... 25.0 B-mag arcsec^-2^ 6.81E+14 337.40 ... ... ... ... ... ...
7 K_s (LGA/2MASS isophotal)
2003AJ....125..525J
102.2 (a) arcsec ... ... 0.950 (b/a) ... ... ... 23.5
[J2000]
20.0 K-mag arcsec^-2^ 1.38E+14 204.40 ... 0.95 0.05 0.05 18 24
[J2000]
8 K_s (LGA/2MASS "total")
2003AJ....125..525J
204.3 (a) arcsec ... ... 0.950 (b/a) ... ... ... 23.5
[J2000]
Diameter for "total" magnitude 1.38E+14 408.60 ... 0.95 0.05 0.05 18 24
[J2000]
9 r (SDSS Isophotal)
2007SDSS6.C...0000:
133.58 (a) arcsec 88.88 arcsec ... ... ... ... 50.9
[J2000]
25.0 mag arcsec^-2^ 4.77E+14 267.16 ... 0.67 0.33 0.39 48 51
[J2000]
10 r (SDSS Petrosian)
2007SDSS6.C...0000:
23.02 (a) arcsec ... ... ... 1.471 ... ... ... ... 4.77E+14 46.03 2.94 ... ... ... ... ...
11 r (SDSS deVaucouleurs)
2007SDSS6.C...0000:
11.7526 (a) arcsec ... ... 0.997 (b/a) 0.043 ... ... 92.3
[J2000]
... 4.77E+14 23.50 0.09 1.00 0.00 0.00 4 92
[J2000]
12 r (SDSS Exponential)
2007SDSS6.C...0000:
7.2567 (a) arcsec ... ... 0.828 (b/a) 0.029 ... ... 86.6
[J2000]
... 4.77E+14 14.51 0.06 0.83 0.17 0.19 34 87
[J2000]


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 1973UGC...C...0000N
Published Object Name         : UGC 07345                     
Frequency Targeted            : POSS1 103a-O                  
Major Axis (2a)               : 5.00       arcmin                   2a = 300.00 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : 2b =  4.70      arcmin              2b = 282.00 arcsec 
Uncertainty                   : ...                                 ...
Axis Ratio                    : ...                                 b/a = 0.94
Uncertainty                   : ...                                 ...
Ellipticity                   : ...                                 1 - b/a = 0.06
Uncertainty                   : ...                                 ...
Eccentricity                  : ...                                 [(a/b)2-1]/[(a/b)2+1] = 0.06
Uncertainty                   : ...                                 ...
Cos-1(b/a)                    : ...                                 20 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          : 121618.         +144200.    (B1950)
Qualifiers                    : From new, raw data
NED Comment                   :                                         

No. 2 Published Units: Homogenized Units: Reference Code : 1964MCG2..C...0000V Published Object Name : MCG +03-31-099 Frequency Targeted : POSS1 103a-O Major Axis (2a) : 1.60 arcmin 2a = 96.00 arcsec Uncertainty : ... ... Minor Axis (2b) : 2b = 1.20 arcmin 2b = 72.00 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.75 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.25 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.28 Uncertainty : ... ... Cos-1(b/a) : ... 41 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 : 121612 +1441 (B1950) Qualifiers : From new, raw data NED Comment :
No. 3 Published Units: Homogenized Units: Reference Code : 1964MCG2..C...0000V Published Object Name : MCG +03-31-099 Frequency Targeted : POSS1 103a-O Major Axis (2a) : 6.00 arcmin 2a = 360.00 arcsec Uncertainty : ... ... Minor Axis (2b) : 2b = 5.00 arcmin 2b = 300.00 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.83 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.17 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.18 Uncertainty : ... ... Cos-1(b/a) : ... 34 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 : "Outer" diameter Coordinates Targeted : 121612 +1441 (B1950) Qualifiers : From new, raw data NED Comment :
No. 4 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : UGC 07345 Frequency Targeted : RC3 D_25, R_25 (blue) Major Axis (2a) : log(2a) + 1 = 1.73 2a = 322.20 arcsec Uncertainty : 0.01 7.50 arcsec Minor Axis (2b) : ... 2b = 280.64 arcsec Uncertainty : ... ... Axis Ratio : log(a/b) = 0.06 b/a = 0.87 Uncertainty : 0.02 0.04 Ellipticity : ... 1 - b/a = 0.13 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.14 Uncertainty : ... ... Cos-1(b/a) : ... 29 deg Position Angle [Equinox] : ... ... 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 : 121849.4 +142507. (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 07345 Frequency Targeted : RC3 A_e (Johnson B) Major Axis (2a) : log(2a) + 1 = 1.27 2a = 111.70 arcsec Uncertainty : 0.01 2.60 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 : 121849.4 +142507. (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 07345 Frequency Targeted : RC3 D_0 (blue) Major Axis (2a) : log(2a) + 1 = 1.75 2a = 337.40 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 : 121849.4 +142507. (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 : NGC 4254 Frequency Targeted : K_s (LGA/2MASS isophotal) Major Axis (2a) : a = 102.2 arcsec 2a = 204.40 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 194.18 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.950 b/a = 0.95 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.05 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.05 Uncertainty : ... ... Cos-1(b/a) : ... 18 deg Position Angle [Equinox] : 23.5 deg [J2000] 24 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 : 184.706772 14.416490 (J2000) Qualifiers : From new, raw data NED Comment :
No. 8 Published Units: Homogenized Units: Reference Code : 2003AJ....125..525J Published Object Name : NGC 4254 Frequency Targeted : K_s (LGA/2MASS "total") Major Axis (2a) : a = 204.3 arcsec 2a = 408.60 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 388.17 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.950 b/a = 0.95 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.05 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.05 Uncertainty : ... ... Cos-1(b/a) : ... 18 deg Position Angle [Equinox] : 23.5 deg [J2000] 24 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 : 184.706772 14.416490 (J2000) Qualifiers : From new, raw data NED Comment :
No. 9 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J121849.60+142459.4 Frequency Targeted : r (SDSS Isophotal) Major Axis (2a) : a = 133.58 arcsec 2a = 267.16 arcsec Uncertainty : ... ... Minor Axis (2b) : b = 88.88 arcsec 2b = 177.76 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] = 0.39 Uncertainty : ... ... Cos-1(b/a) : ... 48 deg Position Angle [Equinox] : 50.9 deg [J2000] 51 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 : 184.7066822787 14.4165085663 (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 J121849.60+142459.4 Frequency Targeted : r (SDSS Petrosian) Major Axis (2a) : a = 23.02 arcsec 2a = 46.03 arcsec Uncertainty : 1.471 arcsec 2.94 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 : 184.7066822787 14.4165085663 (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 : 2007SDSS6.C...0000: Published Object Name : SDSS J121849.60+142459.4 Frequency Targeted : r (SDSS deVaucouleurs) Major Axis (2a) : a = 11.7526 arcsec 2a = 23.50 arcsec Uncertainty : 0.043 arcsec 0.09 arcsec Minor Axis (2b) : ... 2b = 23.43 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.997 b/a = 1.00 Uncertainty : 0.005 0.01 Ellipticity : ... 1 - b/a = 0.00 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.00 Uncertainty : ... ... Cos-1(b/a) : ... 4 deg Position Angle [Equinox] : 92.3 deg [J2000] 92 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 : 184.7066822787 14.4165085663 (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 : 2007SDSS6.C...0000: Published Object Name : SDSS J121849.60+142459.4 Frequency Targeted : r (SDSS Exponential) Major Axis (2a) : a = 7.2567 arcsec 2a = 14.51 arcsec Uncertainty : 0.029 arcsec 0.06 arcsec Minor Axis (2b) : ... 2b = 12.02 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.828 b/a = 0.83 Uncertainty : 0.004 0.00 Ellipticity : ... 1 - b/a = 0.17 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.19 Uncertainty : ... ... Cos-1(b/a) : ... 34 deg Position Angle [Equinox] : 86.6 deg [J2000] 87 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 : 184.7066822787 14.4165085663 (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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