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Date and Time of the Query: 2019-03-24 T17:07:34 PDT
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Diameter data point(s) for object IC 2879

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.......:
10.0 (a) arcsec ... ... 0.520 (b/a) ... ... ... -30
[J2000]
20.0 K-mag arcsec^-2^ 1.38E+14 20.00 ... 0.52 0.48 0.57 59 150
[J2000]
2 K_s (2MASS "total")
20032MASX.C.......:
18.4 (a) arcsec ... ... 0.520 (b/a) ... ... ... -30
[J2000]
Diameter for "total" magnitude 1.38E+14 36.90 ... 0.52 0.48 0.57 59 150
[J2000]
3 r (SDSS Isophotal)
2007SDSS6.C...0000:
13.89 (a) arcsec 11.30 arcsec ... ... ... ... 11.8
[J2000]
25.0 mag arcsec^-2^ 4.77E+14 27.78 ... 0.81 0.19 0.20 36 12
[J2000]
4 r (SDSS Petrosian)
2007SDSS6.C...0000:
4.16 (a) arcsec ... ... ... 0.133 ... ... ... ... 4.77E+14 8.32 0.27 ... ... ... ... ...
5 r (SDSS deVaucouleurs)
2007SDSS6.C...0000:
4.8793 (a) arcsec ... ... 0.552 (b/a) 0.069 ... ... 159.9
[J2000]
... 4.77E+14 9.76 0.14 0.55 0.45 0.53 56 160
[J2000]
6 r (SDSS Exponential)
2007SDSS6.C...0000:
2.1992 (a) arcsec ... ... 0.536 (b/a) 0.017 ... ... 160.1
[J2000]
... 4.77E+14 4.40 0.03 0.54 0.46 0.55 58 160
[J2000]


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 20032MASX.C.......:
Published Object Name         : 2MASX J11294427+0900500       
Frequency Targeted            : K_s (2MASS isophotal)         
Major Axis (2a)               : a = 10.0       arcsec               2a = 20.00 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : ...                                 2b = 10.40 arcsec
Uncertainty                   : ...                                 ...
Axis Ratio                    : b/a = 0.520                         b/a = 0.52
Uncertainty                   : ...                                 ...
Ellipticity                   : ...                                 1 - b/a = 0.48
Uncertainty                   : ...                                 ...
Eccentricity                  : ...                                 [(a/b)2-1]/[(a/b)2+1] = 0.57
Uncertainty                   : ...                                 ...
Cos-1(b/a)                    : ...                                 59 deg
Position Angle [Equinox]      :  -30   deg [J2000]                  150 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          : 172.434525      9.013878    (J2000)
Qualifiers                    : From new, raw data
NED Comment                   :                                         

No. 2 Published Units: Homogenized Units: Reference Code : 20032MASX.C.......: Published Object Name : 2MASX J11294427+0900500 Frequency Targeted : K_s (2MASS "total") Major Axis (2a) : a = 18.4 arcsec 2a = 36.90 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 19.19 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.520 b/a = 0.52 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.48 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.57 Uncertainty : ... ... Cos-1(b/a) : ... 59 deg Position Angle [Equinox] : -30 deg [J2000] 150 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 : 172.434525 9.013878 (J2000) Qualifiers : From new, raw data NED Comment :
No. 3 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J112944.29+090049.8 Frequency Targeted : r (SDSS Isophotal) Major Axis (2a) : a = 13.89 arcsec 2a = 27.78 arcsec Uncertainty : ... ... Minor Axis (2b) : b = 11.30 arcsec 2b = 22.60 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.81 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.19 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.20 Uncertainty : ... ... Cos-1(b/a) : ... 36 deg Position Angle [Equinox] : 11.8 deg [J2000] 12 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 : 172.4345538983 9.0138556087 (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 J112944.29+090049.8 Frequency Targeted : r (SDSS Petrosian) Major Axis (2a) : a = 4.16 arcsec 2a = 8.32 arcsec Uncertainty : 0.133 arcsec 0.27 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 : 172.4345538983 9.0138556087 (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 J112944.29+090049.8 Frequency Targeted : r (SDSS deVaucouleurs) Major Axis (2a) : a = 4.8793 arcsec 2a = 9.76 arcsec Uncertainty : 0.069 arcsec 0.14 arcsec Minor Axis (2b) : ... 2b = 5.39 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.552 b/a = 0.55 Uncertainty : 0.007 0.01 Ellipticity : ... 1 - b/a = 0.45 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.53 Uncertainty : ... ... Cos-1(b/a) : ... 56 deg Position Angle [Equinox] : 159.9 deg [J2000] 160 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 : 172.4345538983 9.0138556087 (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 J112944.29+090049.8 Frequency Targeted : r (SDSS Exponential) Major Axis (2a) : a = 2.1992 arcsec 2a = 4.40 arcsec Uncertainty : 0.017 arcsec 0.03 arcsec Minor Axis (2b) : ... 2b = 2.36 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.536 b/a = 0.54 Uncertainty : 0.006 0.01 Ellipticity : ... 1 - b/a = 0.46 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.55 Uncertainty : ... ... Cos-1(b/a) : ... 58 deg Position Angle [Equinox] : 160.1 deg [J2000] 160 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 : 172.4345538983 9.0138556087 (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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