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Date and Time of the Query: 2019-04-23 T19:12:50 PDT
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Diameter data point(s) for object NGC 4644B

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 K_s (2MASS isophotal)
20032MASX.C.......:
12.1 (a) arcsec ... ... 0.380 (b/a) ... ... ... -50
[J2000]
20.0 K-mag arcsec^-2^ 1.38E+14 24.20 ... 0.38 0.62 0.75 68 130
[J2000]
2 K_s (2MASS "total")
20032MASX.C.......:
35.2 (a) arcsec ... ... 0.380 (b/a) ... ... ... -50
[J2000]
Diameter for "total" magnitude 1.38E+14 70.30 ... 0.38 0.62 0.75 68 130
[J2000]
3 POSS1 103a-O
1962MCG1..C...0000V
0.50 arcmin 0.15 arcmin ... ... ... ... ... High surface brightness 7.40E+14 30.00 ... 0.30 0.70 0.83 73 ...
4 POSS1 103a-O
1962MCG1..C...0000V
1.00 arcmin 0.15 arcmin ... ... ... ... ... Intermed. surface brightness 7.40E+14 60.00 ... 0.15 0.85 0.96 81 ...
5 RC3 D_25, R_25 (blue)
1991RC3.9.C...0000d
1.04 log(2a) + 1 ... ... 0.78
log(a/b)
0.09 ... ... 47
[J2000]
25.0 B-mag arcsec^-2^ 6.81E+14 65.80 15.10 0.17 0.83 0.95 80 47
[J2000]
6 RC3 D_0 (blue)
1991RC3.9.C...0000d
1.04 log(2a) + 1 ... ... ... ... ... ... ... 25.0 B-mag arcsec^-2^ 6.81E+14 65.80 ... ... ... ... ... ...
7 r (SDSS Isophotal)
2004SDSS3.C...0000:
47.05 (a) arcsec 8.21 arcsec ... ... ... ... 139.3
[J2000]
25.0 mag arcsec^-2^ 4.77E+14 94.09 ... 0.17 0.82 0.94 80 139
[J2000]
8 r (SDSS Petrosian)
2004SDSS3.C...0000:
6.68 (a) arcsec ... ... ... 1.67 ... ... ... ... 4.77E+14 13.37 3.35 ... ... ... ... ...
9 r (SDSS de Vaucouleurs)
2004SDSS3.C...0000:
8.52 (a) arcsec ... ... 0.250 (b/a) 0.09 ... ... 131.7
[J2000]
... 4.77E+14 17.04 0.18 0.25 0.75 0.88 76 132
[J2000]
10 r (SDSS Exponential)
2004SDSS3.C...0000:
3.83 (a) arcsec ... ... 0.236 (b/a) 0.02 ... ... 131.7
[J2000]
... 4.77E+14 7.66 0.05 0.24 0.76 0.89 76 132
[J2000]


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 20032MASX.C.......:
Published Object Name         : 2MASX J12425272+5508445       
Frequency Targeted            : K_s (2MASS isophotal)         
Major Axis (2a)               : a = 12.1       arcsec               2a = 24.20 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : ...                                 2b = 9.20 arcsec
Uncertainty                   : ...                                 ...
Axis Ratio                    : b/a = 0.380                         b/a = 0.38
Uncertainty                   : ...                                 ...
Ellipticity                   : ...                                 1 - b/a = 0.62
Uncertainty                   : ...                                 ...
Eccentricity                  : ...                                 [(a/b)2-1]/[(a/b)2+1] = 0.75
Uncertainty                   : ...                                 ...
Cos-1(b/a)                    : ...                                 68 deg
Position Angle [Equinox]      :  -50   deg [J2000]                  130 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          : 190.719696      55.145760    (J2000)
Qualifiers                    : From new, raw data
NED Comment                   :                                         

No. 2 Published Units: Homogenized Units: Reference Code : 20032MASX.C.......: Published Object Name : 2MASX J12425272+5508445 Frequency Targeted : K_s (2MASS "total") Major Axis (2a) : a = 35.2 arcsec 2a = 70.30 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 26.71 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.380 b/a = 0.38 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.62 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.75 Uncertainty : ... ... Cos-1(b/a) : ... 68 deg Position Angle [Equinox] : -50 deg [J2000] 130 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 : 190.719696 55.145760 (J2000) Qualifiers : From new, raw data NED Comment :
No. 3 Published Units: Homogenized Units: Reference Code : 1962MCG1..C...0000V Published Object Name : MCG +09-21-032 Frequency Targeted : POSS1 103a-O Major Axis (2a) : 0.50 arcmin 2a = 30.00 arcsec Uncertainty : ... ... Minor Axis (2b) : 2b = 0.15 arcmin 2b = 9.00 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.30 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.70 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.83 Uncertainty : ... ... Cos-1(b/a) : ... 73 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 : 124030 +5525 (B1950) Qualifiers : From new, raw data NED Comment :
No. 4 Published Units: Homogenized Units: Reference Code : 1962MCG1..C...0000V Published Object Name : MCG +09-21-032 Frequency Targeted : POSS1 103a-O Major Axis (2a) : 1.00 arcmin 2a = 60.00 arcsec Uncertainty : ... ... Minor Axis (2b) : 2b = 0.15 arcmin 2b = 9.00 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.15 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.85 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.96 Uncertainty : ... ... Cos-1(b/a) : ... 81 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 : 124030 +5525 (B1950) Qualifiers : From new, raw data NED Comment :
No. 5 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : MCG +09-21-032 Frequency Targeted : RC3 D_25, R_25 (blue) Major Axis (2a) : log(2a) + 1 = 1.04 2a = 65.80 arcsec Uncertainty : 0.09 15.10 arcsec Minor Axis (2b) : ... 2b = 10.92 arcsec Uncertainty : ... ... Axis Ratio : log(a/b) = 0.78 b/a = 0.17 Uncertainty : 0.07 0.03 Ellipticity : ... 1 - b/a = 0.83 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.95 Uncertainty : ... ... Cos-1(b/a) : ... 80 deg Position Angle [Equinox] : 47 deg [J2000] 47 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 : 124242.0 +550800. (J2000) Qualifiers : Homogenized from previously published data NED Comment :
No. 6 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : MCG +09-21-032 Frequency Targeted : RC3 D_0 (blue) Major Axis (2a) : log(2a) + 1 = 1.04 2a = 65.80 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 : 124242.0 +550800. (J2000) Qualifiers : Homogenized from previously published data NED Comment : Extinction and inclination corrected.
No. 7 Published Units: Homogenized Units: Reference Code : 2004SDSS3.C...0000: Published Object Name : SDSS J124252.65+550844.9 Frequency Targeted : r (SDSS Isophotal) Major Axis (2a) : a = 47.05 arcsec 2a = 94.09 arcsec Uncertainty : ... ... Minor Axis (2b) : b = 8.21 arcsec 2b = 16.42 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.17 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.82 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.94 Uncertainty : ... ... Cos-1(b/a) : ... 80 deg Position Angle [Equinox] : 139.3 deg [J2000] 139 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 : 190.7193604 55.1457939 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment :
No. 8 Published Units: Homogenized Units: Reference Code : 2004SDSS3.C...0000: Published Object Name : SDSS J124252.65+550844.9 Frequency Targeted : r (SDSS Petrosian) Major Axis (2a) : a = 6.68 arcsec 2a = 13.37 arcsec Uncertainty : 1.67 arcsec 3.35 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 : 190.7193604 55.1457939 (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 : 2004SDSS3.C...0000: Published Object Name : SDSS J124252.65+550844.9 Frequency Targeted : r (SDSS de Vaucouleurs) Major Axis (2a) : a = 8.52 arcsec 2a = 17.04 arcsec Uncertainty : 0.09 arcsec 0.18 arcsec Minor Axis (2b) : ... 2b = 4.26 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.250 b/a = 0.25 Uncertainty : 0.003 0.00 Ellipticity : ... 1 - b/a = 0.75 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.88 Uncertainty : ... ... Cos-1(b/a) : ... 76 deg Position Angle [Equinox] : 131.7 deg [J2000] 132 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 : 190.7193604 55.1457939 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment : Effective (half-light) radius
No. 10 Published Units: Homogenized Units: Reference Code : 2004SDSS3.C...0000: Published Object Name : SDSS J124252.65+550844.9 Frequency Targeted : r (SDSS Exponential) Major Axis (2a) : a = 3.83 arcsec 2a = 7.66 arcsec Uncertainty : 0.02 arcsec 0.05 arcsec Minor Axis (2b) : ... 2b = 1.81 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.236 b/a = 0.24 Uncertainty : 0.002 0.00 Ellipticity : ... 1 - b/a = 0.76 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.89 Uncertainty : ... ... Cos-1(b/a) : ... 76 deg Position Angle [Equinox] : 131.7 deg [J2000] 132 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 : 190.7193604 55.1457939 (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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