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Date and Time of the Query: 2019-03-21 T00:38:05 PDT
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Diameter data point(s) for object IC 4576

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.......:
20.7 (a) arcsec ... ... 0.880 (b/a) ... ... ... 85
[J2000]
20.0 K-mag arcsec^-2^ 1.38E+14 41.40 ... 0.88 0.12 0.13 28 85
[J2000]
2 K_s (2MASS "total")
20032MASX.C.......:
36.1 (a) arcsec ... ... 0.880 (b/a) ... ... ... 85
[J2000]
Diameter for "total" magnitude 1.38E+14 72.20 ... 0.88 0.12 0.13 28 85
[J2000]
3 r (SDSS Isophotal)
2007SDSS6.C...0000:
39.82 (a) arcsec 26.63 arcsec ... ... ... ... 75.1
[J2000]
25.0 mag arcsec^-2^ 4.77E+14 79.65 ... 0.67 0.33 0.38 48 75
[J2000]
4 r (SDSS Petrosian)
2007SDSS6.C...0000:
6.07 (a) arcsec ... ... ... 0.196 ... ... ... ... 4.77E+14 12.14 0.39 ... ... ... ... ...
5 r (SDSS deVaucouleurs)
2007SDSS6.C...0000:
3.3941 (a) arcsec ... ... 0.800 (b/a) 0.017 ... ... 73.3
[J2000]
... 4.77E+14 6.79 0.03 0.80 0.20 0.22 37 73
[J2000]
6 r (SDSS Exponential)
2007SDSS6.C...0000:
2.3244 (a) arcsec ... ... 0.837 (b/a) 0.008 ... ... 72.6
[J2000]
... 4.77E+14 4.65 0.02 0.84 0.16 0.18 33 73
[J2000]


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 20032MASX.C.......:
Published Object Name         : 2MASX J15423550+2340124       
Frequency Targeted            : K_s (2MASS isophotal)         
Major Axis (2a)               : a = 20.7       arcsec               2a = 41.40 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : ...                                 2b = 36.43 arcsec
Uncertainty                   : ...                                 ...
Axis Ratio                    : b/a = 0.880                         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)                    : ...                                 28 deg
Position Angle [Equinox]      :   85   deg [J2000]                  85 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          : 235.647934      23.670086    (J2000)
Qualifiers                    : From new, raw data
NED Comment                   :                                         

No. 2 Published Units: Homogenized Units: Reference Code : 20032MASX.C.......: Published Object Name : 2MASX J15423550+2340124 Frequency Targeted : K_s (2MASS "total") Major Axis (2a) : a = 36.1 arcsec 2a = 72.20 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 63.54 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.880 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) : ... 28 deg Position Angle [Equinox] : 85 deg [J2000] 85 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 : 235.647934 23.670086 (J2000) Qualifiers : From new, raw data NED Comment :
No. 3 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J154235.50+234012.1 Frequency Targeted : r (SDSS Isophotal) Major Axis (2a) : a = 39.82 arcsec 2a = 79.65 arcsec Uncertainty : ... ... Minor Axis (2b) : b = 26.63 arcsec 2b = 53.27 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] : 75.1 deg [J2000] 75 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 : 235.6479373314 23.6700529223 (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 J154235.50+234012.1 Frequency Targeted : r (SDSS Petrosian) Major Axis (2a) : a = 6.07 arcsec 2a = 12.14 arcsec Uncertainty : 0.196 arcsec 0.39 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 : 235.6479373314 23.6700529223 (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 J154235.50+234012.1 Frequency Targeted : r (SDSS deVaucouleurs) Major Axis (2a) : a = 3.3941 arcsec 2a = 6.79 arcsec Uncertainty : 0.017 arcsec 0.03 arcsec Minor Axis (2b) : ... 2b = 5.43 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.800 b/a = 0.80 Uncertainty : 0.004 0.00 Ellipticity : ... 1 - b/a = 0.20 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.22 Uncertainty : ... ... Cos-1(b/a) : ... 37 deg Position Angle [Equinox] : 73.3 deg [J2000] 73 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 : 235.6479373314 23.6700529223 (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 J154235.50+234012.1 Frequency Targeted : r (SDSS Exponential) Major Axis (2a) : a = 2.3244 arcsec 2a = 4.65 arcsec Uncertainty : 0.008 arcsec 0.02 arcsec Minor Axis (2b) : ... 2b = 3.89 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.837 b/a = 0.84 Uncertainty : 0.004 0.00 Ellipticity : ... 1 - b/a = 0.16 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.18 Uncertainty : ... ... Cos-1(b/a) : ... 33 deg Position Angle [Equinox] : 72.6 deg [J2000] 73 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 : 235.6479373314 23.6700529223 (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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