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Date and Time of the Query: 2019-03-23 T01:57:43 PDT
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Diameter data point(s) for object IC 3820

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.......:
7.7 (a) arcsec ... ... 0.740 (b/a) ... ... ... 55
[J2000]
20.0 K-mag arcsec^-2^ 1.38E+14 15.40 ... 0.74 0.26 0.29 42 55
[J2000]
2 K_s (2MASS "total")
20032MASX.C.......:
14.7 (a) arcsec ... ... 0.740 (b/a) ... ... ... 55
[J2000]
Diameter for "total" magnitude 1.38E+14 29.40 ... 0.74 0.26 0.29 42 55
[J2000]
3 r (SDSS Isophotal)
2007SDSS6.C...0000:
10.68 (a) arcsec 10.13 arcsec ... ... ... ... 159.1
[J2000]
25.0 mag arcsec^-2^ 4.77E+14 21.37 ... 0.95 0.05 0.05 19 159
[J2000]
4 r (SDSS Petrosian)
2007SDSS6.C...0000:
3.34 (a) arcsec ... ... ... 0.017 ... ... ... ... 4.77E+14 6.69 0.04 ... ... ... ... ...
5 r (SDSS deVaucouleurs)
2007SDSS6.C...0000:
3.9375 (a) arcsec ... ... 1.000 (b/a) 0.058 ... ... 21.0
[J2000]
... 4.77E+14 7.88 0.12 1.00 0.00 0.00 0 21
[J2000]
6 r (SDSS Exponential)
2007SDSS6.C...0000:
1.6419 (a) arcsec ... ... 0.969 (b/a) 0.017 ... ... 54.5
[J2000]
... 4.77E+14 3.28 0.03 0.97 0.03 0.03 14 55
[J2000]


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 20032MASX.C.......:
Published Object Name         : 2MASX J12493886+3707009       
Frequency Targeted            : K_s (2MASS isophotal)         
Major Axis (2a)               : a = 7.7        arcsec               2a = 15.40 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : ...                                 2b = 11.40 arcsec
Uncertainty                   : ...                                 ...
Axis Ratio                    : b/a = 0.740                         b/a = 0.74
Uncertainty                   : ...                                 ...
Ellipticity                   : ...                                 1 - b/a = 0.26
Uncertainty                   : ...                                 ...
Eccentricity                  : ...                                 [(a/b)2-1]/[(a/b)2+1] = 0.29
Uncertainty                   : ...                                 ...
Cos-1(b/a)                    : ...                                 42 deg
Position Angle [Equinox]      :   55   deg [J2000]                  55 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          : 192.412033      37.116978    (J2000)
Qualifiers                    : From new, raw data
NED Comment                   :                                         

No. 2 Published Units: Homogenized Units: Reference Code : 20032MASX.C.......: Published Object Name : 2MASX J12493886+3707009 Frequency Targeted : K_s (2MASS "total") Major Axis (2a) : a = 14.7 arcsec 2a = 29.40 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 21.76 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.740 b/a = 0.74 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.26 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.29 Uncertainty : ... ... Cos-1(b/a) : ... 42 deg Position Angle [Equinox] : 55 deg [J2000] 55 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 : 192.412033 37.116978 (J2000) Qualifiers : From new, raw data NED Comment :
No. 3 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J124938.94+370701.7 Frequency Targeted : r (SDSS Isophotal) Major Axis (2a) : a = 10.68 arcsec 2a = 21.37 arcsec Uncertainty : ... ... Minor Axis (2b) : b = 10.13 arcsec 2b = 20.27 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.95 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.05 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.05 Uncertainty : ... ... Cos-1(b/a) : ... 19 deg Position Angle [Equinox] : 159.1 deg [J2000] 159 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 : 192.4122718382 37.1171659182 (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 J124938.94+370701.7 Frequency Targeted : r (SDSS Petrosian) Major Axis (2a) : a = 3.34 arcsec 2a = 6.69 arcsec Uncertainty : 0.017 arcsec 0.04 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 : 192.4122718382 37.1171659182 (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 J124938.94+370701.7 Frequency Targeted : r (SDSS deVaucouleurs) Major Axis (2a) : a = 3.9375 arcsec 2a = 7.88 arcsec Uncertainty : 0.058 arcsec 0.12 arcsec Minor Axis (2b) : ... 2b = 7.88 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 1.000 b/a = 1.00 Uncertainty : 0.018 0.02 Ellipticity : ... 1 - b/a = 0.00 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.00 Uncertainty : ... ... Cos-1(b/a) : ... 0 deg Position Angle [Equinox] : 21.0 deg [J2000] 21 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 : 192.4122718382 37.1171659182 (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 J124938.94+370701.7 Frequency Targeted : r (SDSS Exponential) Major Axis (2a) : a = 1.6419 arcsec 2a = 3.28 arcsec Uncertainty : 0.017 arcsec 0.03 arcsec Minor Axis (2b) : ... 2b = 3.18 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.969 b/a = 0.97 Uncertainty : 0.011 0.01 Ellipticity : ... 1 - b/a = 0.03 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.03 Uncertainty : ... ... Cos-1(b/a) : ... 14 deg Position Angle [Equinox] : 54.5 deg [J2000] 55 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 : 192.4122718382 37.1171659182 (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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