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Date and Time of the Query: 2019-03-26 T03:20:06 PDT
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Diameter data point(s) for object NGC 3647

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.......:
9.2 (a) arcsec ... ... 0.960 (b/a) ... ... ... 75
[J2000]
20.0 K-mag arcsec^-2^ 1.38E+14 18.40 ... 0.96 0.04 0.04 16 75
[J2000]
2 K_s (2MASS "total")
20032MASX.C.......:
27.6 (a) arcsec ... ... 0.960 (b/a) ... ... ... 75
[J2000]
Diameter for "total" magnitude 1.38E+14 55.10 ... 0.96 0.04 0.04 16 75
[J2000]
3 r (SDSS Isophotal)
2007SDSS6.C...0000:
18.39 (a) arcsec 15.64 arcsec ... ... ... ... 59.6
[J2000]
25.0 mag arcsec^-2^ 4.77E+14 36.78 ... 0.85 0.15 0.16 32 60
[J2000]
4 r (SDSS Petrosian)
2007SDSS6.C...0000:
3.45 (a) arcsec ... ... ... 0.035 ... ... ... ... 4.77E+14 6.90 0.07 ... ... ... ... ...
5 r (SDSS deVaucouleurs)
2007SDSS6.C...0000:
1.6650 (a) arcsec ... ... 0.855 (b/a) 0.011 ... ... 140.4
[J2000]
... 4.77E+14 3.33 0.02 0.85 0.15 0.16 31 140
[J2000]
6 r (SDSS Exponential)
2007SDSS6.C...0000:
1.1749 (a) arcsec ... ... 0.781 (b/a) 0.005 ... ... 144.8
[J2000]
... 4.77E+14 2.35 0.01 0.78 0.22 0.24 39 145
[J2000]


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 20032MASX.C.......:
Published Object Name         : 2MASX J11213859+0253309       
Frequency Targeted            : K_s (2MASS isophotal)         
Major Axis (2a)               : a = 9.2        arcsec               2a = 18.40 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : ...                                 2b = 17.66 arcsec
Uncertainty                   : ...                                 ...
Axis Ratio                    : b/a = 0.960                         b/a = 0.96
Uncertainty                   : ...                                 ...
Ellipticity                   : ...                                 1 - b/a = 0.04
Uncertainty                   : ...                                 ...
Eccentricity                  : ...                                 [(a/b)2-1]/[(a/b)2+1] = 0.04
Uncertainty                   : ...                                 ...
Cos-1(b/a)                    : ...                                 16 deg
Position Angle [Equinox]      :   75   deg [J2000]                  75 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          : 170.410767      2.891839    (J2000)
Qualifiers                    : From new, raw data
NED Comment                   :                                         

No. 2 Published Units: Homogenized Units: Reference Code : 20032MASX.C.......: Published Object Name : 2MASX J11213859+0253309 Frequency Targeted : K_s (2MASS "total") Major Axis (2a) : a = 27.6 arcsec 2a = 55.10 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 52.90 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.960 b/a = 0.96 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.04 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.04 Uncertainty : ... ... Cos-1(b/a) : ... 16 deg Position Angle [Equinox] : 75 deg [J2000] 75 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 : 170.410767 2.891839 (J2000) Qualifiers : From new, raw data NED Comment :
No. 3 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J112138.57+025330.2 Frequency Targeted : r (SDSS Isophotal) Major Axis (2a) : a = 18.39 arcsec 2a = 36.78 arcsec Uncertainty : ... ... Minor Axis (2b) : b = 15.64 arcsec 2b = 31.28 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.85 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.15 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.16 Uncertainty : ... ... Cos-1(b/a) : ... 32 deg Position Angle [Equinox] : 59.6 deg [J2000] 60 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 : 170.4107345043 2.8917313834 (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 J112138.57+025330.2 Frequency Targeted : r (SDSS Petrosian) Major Axis (2a) : a = 3.45 arcsec 2a = 6.90 arcsec Uncertainty : 0.035 arcsec 0.07 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 : 170.4107345043 2.8917313834 (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 J112138.57+025330.2 Frequency Targeted : r (SDSS deVaucouleurs) Major Axis (2a) : a = 1.6650 arcsec 2a = 3.33 arcsec Uncertainty : 0.011 arcsec 0.02 arcsec Minor Axis (2b) : ... 2b = 2.85 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.855 b/a = 0.85 Uncertainty : 0.006 0.01 Ellipticity : ... 1 - b/a = 0.15 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.16 Uncertainty : ... ... Cos-1(b/a) : ... 31 deg Position Angle [Equinox] : 140.4 deg [J2000] 140 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 : 170.4107345043 2.8917313834 (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 J112138.57+025330.2 Frequency Targeted : r (SDSS Exponential) Major Axis (2a) : a = 1.1749 arcsec 2a = 2.35 arcsec Uncertainty : 0.005 arcsec 0.01 arcsec Minor Axis (2b) : ... 2b = 1.84 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.781 b/a = 0.78 Uncertainty : 0.005 0.01 Ellipticity : ... 1 - b/a = 0.22 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.24 Uncertainty : ... ... Cos-1(b/a) : ... 39 deg Position Angle [Equinox] : 144.8 deg [J2000] 145 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 : 170.4107345043 2.8917313834 (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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