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Date and Time of the Query: 2019-06-15 T15:57:56 PDT
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Diameter data point(s) for object IC 3948

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.......:
6.3 (a) arcsec ... ... 0.700 (b/a) ... ... ... 30
[J2000]
20.0 K-mag arcsec^-2^ 1.38E+14 12.60 ... 0.70 0.30 0.34 46 30
[J2000]
2 K_s (2MASS "total")
20032MASX.C.......:
12.9 (a) arcsec ... ... 0.700 (b/a) ... ... ... 30
[J2000]
Diameter for "total" magnitude 1.38E+14 25.80 ... 0.70 0.30 0.34 46 30
[J2000]
3 r (SDSS Isophotal)
2007SDSS6.C...0000:
11.08 (a) arcsec 9.07 arcsec ... ... ... ... 23.0
[J2000]
25.0 mag arcsec^-2^ 4.77E+14 22.16 ... 0.82 0.18 0.20 35 23
[J2000]
4 r (SDSS Petrosian)
2007SDSS6.C...0000:
2.28 (a) arcsec ... ... ... 0.067 ... ... ... ... 4.77E+14 4.57 0.13 ... ... ... ... ...
5 r (SDSS deVaucouleurs)
2007SDSS6.C...0000:
0.7778 (a) arcsec ... ... 0.902 (b/a) 0.015 ... ... 173.3
[J2000]
... 4.77E+14 1.56 0.03 0.90 0.10 0.10 26 173
[J2000]
6 r (SDSS Exponential)
2007SDSS6.C...0000:
0.5664 (a) arcsec ... ... 0.832 (b/a) 0.004 ... ... 170.4
[J2000]
... 4.77E+14 1.13 0.01 0.83 0.17 0.18 34 170
[J2000]


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 20032MASX.C.......:
Published Object Name         : 2MASX J12585817+2403409       
Frequency Targeted            : K_s (2MASS isophotal)         
Major Axis (2a)               : a = 6.3        arcsec               2a = 12.60 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : ...                                 2b = 8.82 arcsec
Uncertainty                   : ...                                 ...
Axis Ratio                    : b/a = 0.700                         b/a = 0.70
Uncertainty                   : ...                                 ...
Ellipticity                   : ...                                 1 - b/a = 0.30
Uncertainty                   : ...                                 ...
Eccentricity                  : ...                                 [(a/b)2-1]/[(a/b)2+1] = 0.34
Uncertainty                   : ...                                 ...
Cos-1(b/a)                    : ...                                 46 deg
Position Angle [Equinox]      :   30   deg [J2000]                  30 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          : 194.742279      24.061382    (J2000)
Qualifiers                    : From new, raw data
NED Comment                   :                                         

No. 2 Published Units: Homogenized Units: Reference Code : 20032MASX.C.......: Published Object Name : 2MASX J12585817+2403409 Frequency Targeted : K_s (2MASS "total") Major Axis (2a) : a = 12.9 arcsec 2a = 25.80 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 18.06 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.700 b/a = 0.70 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.30 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.34 Uncertainty : ... ... Cos-1(b/a) : ... 46 deg Position Angle [Equinox] : 30 deg [J2000] 30 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 : 194.742279 24.061382 (J2000) Qualifiers : From new, raw data NED Comment :
No. 3 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J125858.15+240340.9 Frequency Targeted : r (SDSS Isophotal) Major Axis (2a) : a = 11.08 arcsec 2a = 22.16 arcsec Uncertainty : ... ... Minor Axis (2b) : b = 9.07 arcsec 2b = 18.14 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.82 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.18 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.20 Uncertainty : ... ... Cos-1(b/a) : ... 35 deg Position Angle [Equinox] : 23.0 deg [J2000] 23 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 : 194.7422924506 24.0613715153 (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 J125858.15+240340.9 Frequency Targeted : r (SDSS Petrosian) Major Axis (2a) : a = 2.28 arcsec 2a = 4.57 arcsec Uncertainty : 0.067 arcsec 0.13 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 : 194.7422924506 24.0613715153 (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 J125858.15+240340.9 Frequency Targeted : r (SDSS deVaucouleurs) Major Axis (2a) : a = 0.7778 arcsec 2a = 1.56 arcsec Uncertainty : 0.015 arcsec 0.03 arcsec Minor Axis (2b) : ... 2b = 1.40 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.902 b/a = 0.90 Uncertainty : 0.013 0.01 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] : 173.3 deg [J2000] 173 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 : 194.7422924506 24.0613715153 (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 J125858.15+240340.9 Frequency Targeted : r (SDSS Exponential) Major Axis (2a) : a = 0.5664 arcsec 2a = 1.13 arcsec Uncertainty : 0.004 arcsec 0.01 arcsec Minor Axis (2b) : ... 2b = 0.94 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.832 b/a = 0.83 Uncertainty : 0.010 0.01 Ellipticity : ... 1 - b/a = 0.17 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.18 Uncertainty : ... ... Cos-1(b/a) : ... 34 deg Position Angle [Equinox] : 170.4 deg [J2000] 170 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 : 194.7422924506 24.0613715153 (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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