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Date and Time of the Query: 2019-07-19 T16:52:51 PDT
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Diameter data point(s) for object IC 4042

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.......:
16.6 (a) arcsec ... ... 0.900 (b/a) ... ... ... 40
[J2000]
20.0 K-mag arcsec^-2^ 1.38E+14 33.20 ... 0.90 0.10 0.10 26 40
[J2000]
2 K_s (2MASS "total")
20032MASX.C.......:
40.9 (a) arcsec ... ... 0.900 (b/a) ... ... ... 40
[J2000]
Diameter for "total" magnitude 1.38E+14 81.70 ... 0.90 0.10 0.10 26 40
[J2000]
3 RC3 A_e (Johnson B)
1991RC3.9.C...0000d
0.27 log(2a) + 1 ... ... ... 0.02 ... ... ... ... 6.81E+14 11.20 0.50 ... ... ... ... ...
4 r (SDSS Isophotal)
2007SDSS6.C...0000:
23.40 (a) arcsec 20.86 arcsec ... ... ... ... 106.9
[J2000]
25.0 mag arcsec^-2^ 4.77E+14 46.80 ... 0.89 0.11 0.11 27 107
[J2000]
5 r (SDSS Petrosian)
2007SDSS6.C...0000:
4.66 (a) arcsec ... ... ... 0.077 ... ... ... ... 4.77E+14 9.32 0.15 ... ... ... ... ...
6 r (SDSS deVaucouleurs)
2007SDSS6.C...0000:
1.9538 (a) arcsec ... ... 0.894 (b/a) 0.014 ... ... 58.6
[J2000]
... 4.77E+14 3.91 0.03 0.89 0.11 0.11 27 59
[J2000]
7 r (SDSS Exponential)
2007SDSS6.C...0000:
1.7606 (a) arcsec ... ... 0.821 (b/a) 0.006 ... ... 51.4
[J2000]
... 4.77E+14 3.52 0.01 0.82 0.18 0.19 35 51
[J2000]


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 20032MASX.C.......:
Published Object Name         : 2MASX J13004277+2758166       
Frequency Targeted            : K_s (2MASS isophotal)         
Major Axis (2a)               : a = 16.6       arcsec               2a = 33.20 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : ...                                 2b = 29.88 arcsec
Uncertainty                   : ...                                 ...
Axis Ratio                    : b/a = 0.900                         b/a = 0.90
Uncertainty                   : ...                                 ...
Ellipticity                   : ...                                 1 - b/a = 0.10
Uncertainty                   : ...                                 ...
Eccentricity                  : ...                                 [(a/b)2-1]/[(a/b)2+1] = 0.10
Uncertainty                   : ...                                 ...
Cos-1(b/a)                    : ...                                 26 deg
Position Angle [Equinox]      :   40   deg [J2000]                  40 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          : 195.178177      27.971270    (J2000)
Qualifiers                    : From new, raw data
NED Comment                   :                                         

No. 2 Published Units: Homogenized Units: Reference Code : 20032MASX.C.......: Published Object Name : 2MASX J13004277+2758166 Frequency Targeted : K_s (2MASS "total") Major Axis (2a) : a = 40.9 arcsec 2a = 81.70 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 73.53 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.900 b/a = 0.90 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.10 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.10 Uncertainty : ... ... Cos-1(b/a) : ... 26 deg Position Angle [Equinox] : 40 deg [J2000] 40 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 : 195.178177 27.971270 (J2000) Qualifiers : From new, raw data NED Comment :
No. 3 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : CGCG 160-255 Frequency Targeted : RC3 A_e (Johnson B) Major Axis (2a) : log(2a) + 1 = 0.27 2a = 11.20 arcsec Uncertainty : 0.02 0.50 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 : 130042.8 +275816. (J2000) Qualifiers : From new, raw data NED Comment : From magnitude-aperture curves.
No. 4 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J130042.75+275816.5 Frequency Targeted : r (SDSS Isophotal) Major Axis (2a) : a = 23.40 arcsec 2a = 46.80 arcsec Uncertainty : ... ... Minor Axis (2b) : b = 20.86 arcsec 2b = 41.72 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.89 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.11 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.11 Uncertainty : ... ... Cos-1(b/a) : ... 27 deg Position Angle [Equinox] : 106.9 deg [J2000] 107 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 : 195.1781507892 27.9712663082 (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 J130042.75+275816.5 Frequency Targeted : r (SDSS Petrosian) Major Axis (2a) : a = 4.66 arcsec 2a = 9.32 arcsec Uncertainty : 0.077 arcsec 0.15 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 : 195.1781507892 27.9712663082 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment :
No. 6 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J130042.75+275816.5 Frequency Targeted : r (SDSS deVaucouleurs) Major Axis (2a) : a = 1.9538 arcsec 2a = 3.91 arcsec Uncertainty : 0.014 arcsec 0.03 arcsec Minor Axis (2b) : ... 2b = 3.49 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.894 b/a = 0.89 Uncertainty : 0.005 0.01 Ellipticity : ... 1 - b/a = 0.11 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.11 Uncertainty : ... ... Cos-1(b/a) : ... 27 deg Position Angle [Equinox] : 58.6 deg [J2000] 59 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 : 195.1781507892 27.9712663082 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment : Effective (half-light) radius
No. 7 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J130042.75+275816.5 Frequency Targeted : r (SDSS Exponential) Major Axis (2a) : a = 1.7606 arcsec 2a = 3.52 arcsec Uncertainty : 0.006 arcsec 0.01 arcsec Minor Axis (2b) : ... 2b = 2.89 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.821 b/a = 0.82 Uncertainty : 0.004 0.00 Ellipticity : ... 1 - b/a = 0.18 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.19 Uncertainty : ... ... Cos-1(b/a) : ... 35 deg Position Angle [Equinox] : 51.4 deg [J2000] 51 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 : 195.1781507892 27.9712663082 (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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