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Date and Time of the Query: 2019-05-27 T05:35:00 PDT
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Diameter data point(s) for object IC 0818

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.......:
21.9 (a) arcsec ... ... 0.320 (b/a) ... ... ... 50
[J2000]
20.0 K-mag arcsec^-2^ 1.38E+14 43.80 ... 0.32 0.68 0.81 71 50
[J2000]
2 K_s (2MASS "total")
20032MASX.C.......:
34.9 (a) arcsec ... ... 0.320 (b/a) ... ... ... 50
[J2000]
Diameter for "total" magnitude 1.38E+14 69.70 ... 0.32 0.68 0.81 71 50
[J2000]
3 POSS1 103a-O
1964MCG2..C...0000V
0.80 arcmin 0.20 arcmin ... ... ... ... ... Low surface brightness 7.40E+14 48.00 ... 0.25 0.75 0.88 76 ...
4 RC3 D_25, R_25 (blue)
1991RC3.9.C...0000d
0.94 log(2a) + 1 ... ... 0.57
log(a/b)
0.11 ... ... ... 25.0 B-mag arcsec^-2^ 6.81E+14 52.30 15.10 0.27 0.73 0.87 74 ...
5 RC3 D_0 (blue)
1991RC3.9.C...0000d
0.94 log(2a) + 1 ... ... ... ... ... ... ... 25.0 B-mag arcsec^-2^ 6.81E+14 52.30 ... ... ... ... ... ...
6 r (SDSS Isophotal)
2007SDSS6.C...0000:
36.69 (a) arcsec 9.79 arcsec ... ... ... ... 46.4
[J2000]
25.0 mag arcsec^-2^ 4.77E+14 73.37 ... 0.27 0.73 0.87 75 46
[J2000]
7 r (SDSS Petrosian)
2007SDSS6.C...0000:
5.63 (a) arcsec ... ... ... 0.822 ... ... ... ... 4.77E+14 11.26 1.64 ... ... ... ... ...
8 r (SDSS deVaucouleurs)
2007SDSS6.C...0000:
4.9677 (a) arcsec ... ... 0.313 (b/a) 0.030 ... ... 49.8
[J2000]
... 4.77E+14 9.94 0.06 0.31 0.69 0.82 72 50
[J2000]
9 r (SDSS Exponential)
2007SDSS6.C...0000:
3.4130 (a) arcsec ... ... 0.269 (b/a) 0.007 ... ... 50.1
[J2000]
... 4.77E+14 6.83 0.01 0.27 0.73 0.87 74 50
[J2000]


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 20032MASX.C.......:
Published Object Name         : 2MASX J12464453+2944068       
Frequency Targeted            : K_s (2MASS isophotal)         
Major Axis (2a)               : a = 21.9       arcsec               2a = 43.80 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : ...                                 2b = 14.02 arcsec
Uncertainty                   : ...                                 ...
Axis Ratio                    : b/a = 0.320                         b/a = 0.32
Uncertainty                   : ...                                 ...
Ellipticity                   : ...                                 1 - b/a = 0.68
Uncertainty                   : ...                                 ...
Eccentricity                  : ...                                 [(a/b)2-1]/[(a/b)2+1] = 0.81
Uncertainty                   : ...                                 ...
Cos-1(b/a)                    : ...                                 71 deg
Position Angle [Equinox]      :   50   deg [J2000]                  50 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          : 191.685577      29.735241    (J2000)
Qualifiers                    : From new, raw data
NED Comment                   :                                         

No. 2 Published Units: Homogenized Units: Reference Code : 20032MASX.C.......: Published Object Name : 2MASX J12464453+2944068 Frequency Targeted : K_s (2MASS "total") Major Axis (2a) : a = 34.9 arcsec 2a = 69.70 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 22.30 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.320 b/a = 0.32 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.68 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.81 Uncertainty : ... ... Cos-1(b/a) : ... 71 deg Position Angle [Equinox] : 50 deg [J2000] 50 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 : 191.685577 29.735241 (J2000) Qualifiers : From new, raw data NED Comment :
No. 3 Published Units: Homogenized Units: Reference Code : 1964MCG2..C...0000V Published Object Name : MCG +05-30-078 Frequency Targeted : POSS1 103a-O Major Axis (2a) : 0.80 arcmin 2a = 48.00 arcsec Uncertainty : ... ... Minor Axis (2b) : 2b = 0.20 arcmin 2b = 12.00 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.25 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.75 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.88 Uncertainty : ... ... Cos-1(b/a) : ... 76 deg Position Angle [Equinox] : ... ... Uncertainty : ... ... Significance : No uncertainty reported Diameter Reference Level : Low surface brightness Frequency : 4050 A 7.40E+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 : "Outer" diameter Coordinates Targeted : 124424 +3001 (B1950) Qualifiers : From new, raw data NED Comment :
No. 4 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : MCG +05-30-078 Frequency Targeted : RC3 D_25, R_25 (blue) Major Axis (2a) : log(2a) + 1 = 0.94 2a = 52.30 arcsec Uncertainty : 0.11 15.10 arcsec Minor Axis (2b) : ... 2b = 14.07 arcsec Uncertainty : ... ... Axis Ratio : log(a/b) = 0.57 b/a = 0.27 Uncertainty : 0.07 0.05 Ellipticity : ... 1 - b/a = 0.73 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.87 Uncertainty : ... ... Cos-1(b/a) : ... 74 deg Position Angle [Equinox] : ... ... Uncertainty : ... ... Significance : Mean error Diameter Reference Level : 25.0 B-mag arcsec^-2^ 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 : 124644.5 +294407. (J2000) Qualifiers : Homogenized from previously published data NED Comment :
No. 5 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : MCG +05-30-078 Frequency Targeted : RC3 D_0 (blue) Major Axis (2a) : log(2a) + 1 = 0.94 2a = 52.30 arcsec Uncertainty : ... ... Minor Axis (2b) : ... ... Uncertainty : ... ... Axis Ratio : ... ... Uncertainty : ... ... Ellipticity : ... ... Uncertainty : ... ... Eccentricity : ... ... Uncertainty : ... ... Cos-1(b/a) : ... ... Position Angle [Equinox] : ... ... Uncertainty : ... ... Significance : No uncertainty reported Diameter Reference Level : 25.0 B-mag arcsec^-2^ 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 : 124644.5 +294407. (J2000) Qualifiers : Homogenized from previously published data NED Comment : Extinction and inclination corrected.
No. 6 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J124644.55+294407.0 Frequency Targeted : r (SDSS Isophotal) Major Axis (2a) : a = 36.69 arcsec 2a = 73.37 arcsec Uncertainty : ... ... Minor Axis (2b) : b = 9.79 arcsec 2b = 19.58 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.27 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.73 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.87 Uncertainty : ... ... Cos-1(b/a) : ... 75 deg Position Angle [Equinox] : 46.4 deg [J2000] 46 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 : 191.6856427944 29.7352885723 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment :
No. 7 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J124644.55+294407.0 Frequency Targeted : r (SDSS Petrosian) Major Axis (2a) : a = 5.63 arcsec 2a = 11.26 arcsec Uncertainty : 0.822 arcsec 1.64 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 : 191.6856427944 29.7352885723 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment :
No. 8 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J124644.55+294407.0 Frequency Targeted : r (SDSS deVaucouleurs) Major Axis (2a) : a = 4.9677 arcsec 2a = 9.94 arcsec Uncertainty : 0.030 arcsec 0.06 arcsec Minor Axis (2b) : ... 2b = 3.11 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.313 b/a = 0.31 Uncertainty : 0.002 0.00 Ellipticity : ... 1 - b/a = 0.69 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.82 Uncertainty : ... ... Cos-1(b/a) : ... 72 deg Position Angle [Equinox] : 49.8 deg [J2000] 50 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 : 191.6856427944 29.7352885723 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment : Effective (half-light) radius
No. 9 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J124644.55+294407.0 Frequency Targeted : r (SDSS Exponential) Major Axis (2a) : a = 3.4130 arcsec 2a = 6.83 arcsec Uncertainty : 0.007 arcsec 0.01 arcsec Minor Axis (2b) : ... 2b = 1.84 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.269 b/a = 0.27 Uncertainty : 0.001 0.00 Ellipticity : ... 1 - b/a = 0.73 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.87 Uncertainty : ... ... Cos-1(b/a) : ... 74 deg Position Angle [Equinox] : 50.1 deg [J2000] 50 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 : 191.6856427944 29.7352885723 (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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