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Date and Time of the Query: 2019-03-21 T06:11:24 PDT
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Diameter data point(s) for object IC 3914

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.......:
7.6 (a) arcsec ... ... 0.800 (b/a) ... ... ... -45
[J2000]
20.0 K-mag arcsec^-2^ 1.38E+14 15.20 ... 0.80 0.20 0.22 37 135
[J2000]
2 K_s (2MASS "total")
20032MASX.C.......:
16.4 (a) arcsec ... ... 0.800 (b/a) ... ... ... -45
[J2000]
Diameter for "total" magnitude 1.38E+14 32.90 ... 0.80 0.20 0.22 37 135
[J2000]
3 r (SDSS Isophotal)
2007SDSS6.C...0000:
12.18 (a) arcsec 10.05 arcsec ... ... ... ... 110.2
[J2000]
25.0 mag arcsec^-2^ 4.77E+14 24.35 ... 0.82 0.18 0.19 34 110
[J2000]
4 r (SDSS Petrosian)
2007SDSS6.C...0000:
2.67 (a) arcsec ... ... ... 0.049 ... ... ... ... 4.77E+14 5.33 0.10 ... ... ... ... ...
5 r (SDSS deVaucouleurs)
2007SDSS6.C...0000:
1.0376 (a) arcsec ... ... 0.881 (b/a) 0.018 ... ... 99.9
[J2000]
... 4.77E+14 2.08 0.04 0.88 0.12 0.13 28 100
[J2000]
6 r (SDSS Exponential)
2007SDSS6.C...0000:
0.7287 (a) arcsec ... ... 0.839 (b/a) 0.005 ... ... 98.8
[J2000]
... 4.77E+14 1.46 0.01 0.84 0.16 0.17 33 99
[J2000]


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 20032MASX.C.......:
Published Object Name         : 2MASX J12562277+3621393       
Frequency Targeted            : K_s (2MASS isophotal)         
Major Axis (2a)               : a = 7.6        arcsec               2a = 15.20 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : ...                                 2b = 12.16 arcsec
Uncertainty                   : ...                                 ...
Axis Ratio                    : b/a = 0.800                         b/a = 0.80
Uncertainty                   : ...                                 ...
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]      :  -45   deg [J2000]                  135 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          : 194.094940      36.360943    (J2000)
Qualifiers                    : From new, raw data
NED Comment                   :                                         

No. 2 Published Units: Homogenized Units: Reference Code : 20032MASX.C.......: Published Object Name : 2MASX J12562277+3621393 Frequency Targeted : K_s (2MASS "total") Major Axis (2a) : a = 16.4 arcsec 2a = 32.90 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 26.32 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.800 b/a = 0.80 Uncertainty : ... ... 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] : -45 deg [J2000] 135 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 : 194.094940 36.360943 (J2000) Qualifiers : From new, raw data NED Comment :
No. 3 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J125622.78+362139.2 Frequency Targeted : r (SDSS Isophotal) Major Axis (2a) : a = 12.18 arcsec 2a = 24.35 arcsec Uncertainty : ... ... Minor Axis (2b) : b = 10.05 arcsec 2b = 20.09 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] = 0.19 Uncertainty : ... ... Cos-1(b/a) : ... 34 deg Position Angle [Equinox] : 110.2 deg [J2000] 110 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 : 194.0949170536 36.3609050926 (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 J125622.78+362139.2 Frequency Targeted : r (SDSS Petrosian) Major Axis (2a) : a = 2.67 arcsec 2a = 5.33 arcsec Uncertainty : 0.049 arcsec 0.10 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 : 194.0949170536 36.3609050926 (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 J125622.78+362139.2 Frequency Targeted : r (SDSS deVaucouleurs) Major Axis (2a) : a = 1.0376 arcsec 2a = 2.08 arcsec Uncertainty : 0.018 arcsec 0.04 arcsec Minor Axis (2b) : ... 2b = 1.83 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.881 b/a = 0.88 Uncertainty : 0.010 0.01 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] : 99.9 deg [J2000] 100 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 : 194.0949170536 36.3609050926 (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 J125622.78+362139.2 Frequency Targeted : r (SDSS Exponential) Major Axis (2a) : a = 0.7287 arcsec 2a = 1.46 arcsec Uncertainty : 0.005 arcsec 0.01 arcsec Minor Axis (2b) : ... 2b = 1.22 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.839 b/a = 0.84 Uncertainty : 0.008 0.01 Ellipticity : ... 1 - b/a = 0.16 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.17 Uncertainty : ... ... Cos-1(b/a) : ... 33 deg Position Angle [Equinox] : 98.8 deg [J2000] 99 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 : 194.0949170536 36.3609050926 (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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