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Date and Time of the Query: 2019-03-24 T16:32:51 PDT
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Diameter data point(s) for object NGC 4807A

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.......:
11.2 (a) arcsec ... ... 0.420 (b/a) ... ... ... -55
[J2000]
20.0 K-mag arcsec^-2^ 1.38E+14 22.40 ... 0.42 0.58 0.70 65 125
[J2000]
2 K_s (2MASS "total")
20032MASX.C.......:
20.9 (a) arcsec ... ... 0.420 (b/a) ... ... ... -55
[J2000]
Diameter for "total" magnitude 1.38E+14 41.70 ... 0.42 0.58 0.70 65 125
[J2000]
3 r (SDSS Isophotal)
2007SDSS6.C...0000:
17.80 (a) arcsec 11.99 arcsec ... ... ... ... 118.7
[J2000]
25.0 mag arcsec^-2^ 4.77E+14 35.59 ... 0.67 0.33 0.38 48 119
[J2000]
4 r (SDSS Petrosian)
2007SDSS6.C...0000:
4.90 (a) arcsec ... ... ... 0.544 ... ... ... ... 4.77E+14 9.81 1.09 ... ... ... ... ...
5 r (SDSS deVaucouleurs)
2007SDSS6.C...0000:
3.9161 (a) arcsec ... ... 0.417 (b/a) 0.052 ... ... 121.0
[J2000]
... 4.77E+14 7.83 0.10 0.42 0.58 0.70 65 121
[J2000]
6 r (SDSS Exponential)
2007SDSS6.C...0000:
1.9589 (a) arcsec ... ... 0.411 (b/a) 0.014 ... ... 121.3
[J2000]
... 4.77E+14 3.92 0.03 0.41 0.59 0.71 66 121
[J2000]


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 20032MASX.C.......:
Published Object Name         : 2MASX J12553058+2732398       
Frequency Targeted            : K_s (2MASS isophotal)         
Major Axis (2a)               : a = 11.2       arcsec               2a = 22.40 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : ...                                 2b = 9.41 arcsec
Uncertainty                   : ...                                 ...
Axis Ratio                    : b/a = 0.420                         b/a = 0.42
Uncertainty                   : ...                                 ...
Ellipticity                   : ...                                 1 - b/a = 0.58
Uncertainty                   : ...                                 ...
Eccentricity                  : ...                                 [(a/b)2-1]/[(a/b)2+1] = 0.70
Uncertainty                   : ...                                 ...
Cos-1(b/a)                    : ...                                 65 deg
Position Angle [Equinox]      :  -55   deg [J2000]                  125 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          : 193.877502      27.544336    (J2000)
Qualifiers                    : From new, raw data
NED Comment                   :                                         

No. 2 Published Units: Homogenized Units: Reference Code : 20032MASX.C.......: Published Object Name : 2MASX J12553058+2732398 Frequency Targeted : K_s (2MASS "total") Major Axis (2a) : a = 20.9 arcsec 2a = 41.70 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 17.51 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.420 b/a = 0.42 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.58 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.70 Uncertainty : ... ... Cos-1(b/a) : ... 65 deg Position Angle [Equinox] : -55 deg [J2000] 125 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 : 193.877502 27.544336 (J2000) Qualifiers : From new, raw data NED Comment :
No. 3 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J125530.61+273239.3 Frequency Targeted : r (SDSS Isophotal) Major Axis (2a) : a = 17.80 arcsec 2a = 35.59 arcsec Uncertainty : ... ... Minor Axis (2b) : b = 11.99 arcsec 2b = 23.98 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] : 118.7 deg [J2000] 119 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 : 193.8775782863 27.5442677272 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment :
No. 4 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J125530.61+273239.3 Frequency Targeted : r (SDSS Petrosian) Major Axis (2a) : a = 4.90 arcsec 2a = 9.81 arcsec Uncertainty : 0.544 arcsec 1.09 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 : 193.8775782863 27.5442677272 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment :
No. 5 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J125530.61+273239.3 Frequency Targeted : r (SDSS deVaucouleurs) Major Axis (2a) : a = 3.9161 arcsec 2a = 7.83 arcsec Uncertainty : 0.052 arcsec 0.10 arcsec Minor Axis (2b) : ... 2b = 3.27 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.417 b/a = 0.42 Uncertainty : 0.004 0.00 Ellipticity : ... 1 - b/a = 0.58 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.70 Uncertainty : ... ... Cos-1(b/a) : ... 65 deg Position Angle [Equinox] : 121.0 deg [J2000] 121 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 : 193.8775782863 27.5442677272 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment : Effective (half-light) radius
No. 6 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J125530.61+273239.3 Frequency Targeted : r (SDSS Exponential) Major Axis (2a) : a = 1.9589 arcsec 2a = 3.92 arcsec Uncertainty : 0.014 arcsec 0.03 arcsec Minor Axis (2b) : ... 2b = 1.61 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.411 b/a = 0.41 Uncertainty : 0.003 0.00 Ellipticity : ... 1 - b/a = 0.59 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.71 Uncertainty : ... ... Cos-1(b/a) : ... 66 deg Position Angle [Equinox] : 121.3 deg [J2000] 121 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 : 193.8775782863 27.5442677272 (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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