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Date and Time of the Query: 2019-06-18 T16:24:05 PDT
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Diameter data point(s) for object IC 0817

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.......:
12.8 (a) arcsec ... ... 0.820 (b/a) ... ... ... 70
[J2000]
20.0 K-mag arcsec^-2^ 1.38E+14 25.60 ... 0.82 0.18 0.20 35 70
[J2000]
2 K_s (2MASS "total")
20032MASX.C.......:
25.7 (a) arcsec ... ... 0.820 (b/a) ... ... ... 70
[J2000]
Diameter for "total" magnitude 1.38E+14 51.30 ... 0.82 0.18 0.20 35 70
[J2000]
3 POSS1 103a-O
1963MCG3..C...0000V
0.30 arcmin 0.25 arcmin ... ... ... ... ... Very high surface brightness 7.40E+14 18.00 ... 0.83 0.17 0.18 34 ...
4 r (SDSS Isophotal)
2007SDSS6.C...0000:
25.59 (a) arcsec 20.31 arcsec ... ... ... ... 91.4
[J2000]
25.0 mag arcsec^-2^ 4.77E+14 51.18 ... 0.79 0.21 0.23 37 91
[J2000]
5 r (SDSS Petrosian)
2007SDSS6.C...0000:
4.66 (a) arcsec ... ... ... 0.123 ... ... ... ... 4.77E+14 9.33 0.25 ... ... ... ... ...
6 r (SDSS deVaucouleurs)
2007SDSS6.C...0000:
2.1559 (a) arcsec ... ... 0.766 (b/a) 0.013 ... ... 95.0
[J2000]
... 4.77E+14 4.31 0.03 0.77 0.23 0.26 40 95
[J2000]
7 r (SDSS Exponential)
2007SDSS6.C...0000:
1.7332 (a) arcsec ... ... 0.720 (b/a) 0.006 ... ... 94.6
[J2000]
... 4.77E+14 3.47 0.01 0.72 0.28 0.32 44 95
[J2000]


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 20032MASX.C.......:
Published Object Name         : 2MASX J12465678+0951254       
Frequency Targeted            : K_s (2MASS isophotal)         
Major Axis (2a)               : a = 12.8       arcsec               2a = 25.60 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : ...                                 2b = 20.99 arcsec
Uncertainty                   : ...                                 ...
Axis Ratio                    : b/a = 0.820                         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]      :   70   deg [J2000]                  70 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          : 191.736618      9.857050    (J2000)
Qualifiers                    : From new, raw data
NED Comment                   :                                         

No. 2 Published Units: Homogenized Units: Reference Code : 20032MASX.C.......: Published Object Name : 2MASX J12465678+0951254 Frequency Targeted : K_s (2MASS "total") Major Axis (2a) : a = 25.7 arcsec 2a = 51.30 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 42.07 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.820 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] : 70 deg [J2000] 70 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 : 191.736618 9.857050 (J2000) Qualifiers : From new, raw data NED Comment :
No. 3 Published Units: Homogenized Units: Reference Code : 1963MCG3..C...0000V Published Object Name : MCG +02-33-020 Frequency Targeted : POSS1 103a-O Major Axis (2a) : 0.30 arcmin 2a = 18.00 arcsec Uncertainty : ... ... Minor Axis (2b) : 2b = 0.25 arcmin 2b = 15.00 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.83 Uncertainty : ... ... 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] : ... ... Uncertainty : ... ... Significance : No uncertainty reported Diameter Reference Level : Very high 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 : "Inner" diameter Coordinates Targeted : 124424 +1008 (B1950) Qualifiers : From new, raw data NED Comment :
No. 4 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J124656.80+095125.5 Frequency Targeted : r (SDSS Isophotal) Major Axis (2a) : a = 25.59 arcsec 2a = 51.18 arcsec Uncertainty : ... ... Minor Axis (2b) : b = 20.31 arcsec 2b = 40.62 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.79 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.21 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.23 Uncertainty : ... ... Cos-1(b/a) : ... 37 deg Position Angle [Equinox] : 91.4 deg [J2000] 91 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 : 191.7366729022 9.8571109545 (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 J124656.80+095125.5 Frequency Targeted : r (SDSS Petrosian) Major Axis (2a) : a = 4.66 arcsec 2a = 9.33 arcsec Uncertainty : 0.123 arcsec 0.25 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 : 191.7366729022 9.8571109545 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment :
No. 6 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J124656.80+095125.5 Frequency Targeted : r (SDSS deVaucouleurs) Major Axis (2a) : a = 2.1559 arcsec 2a = 4.31 arcsec Uncertainty : 0.013 arcsec 0.03 arcsec Minor Axis (2b) : ... 2b = 3.30 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.766 b/a = 0.77 Uncertainty : 0.004 0.00 Ellipticity : ... 1 - b/a = 0.23 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.26 Uncertainty : ... ... Cos-1(b/a) : ... 40 deg Position Angle [Equinox] : 95.0 deg [J2000] 95 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 : 191.7366729022 9.8571109545 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment : Effective (half-light) radius
No. 7 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J124656.80+095125.5 Frequency Targeted : r (SDSS Exponential) Major Axis (2a) : a = 1.7332 arcsec 2a = 3.47 arcsec Uncertainty : 0.006 arcsec 0.01 arcsec Minor Axis (2b) : ... 2b = 2.50 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.720 b/a = 0.72 Uncertainty : 0.004 0.00 Ellipticity : ... 1 - b/a = 0.28 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.32 Uncertainty : ... ... Cos-1(b/a) : ... 44 deg Position Angle [Equinox] : 94.6 deg [J2000] 95 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 : 191.7366729022 9.8571109545 (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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