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Date and Time of the Query: 2019-06-19 T22:45:07 PDT
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Diameter data point(s) for object IC 2475

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.......:
17.3 (a) arcsec ... ... 0.540 (b/a) ... ... ... -65
[J2000]
20.0 K-mag arcsec^-2^ 1.38E+14 34.60 ... 0.54 0.46 0.55 57 115
[J2000]
2 K_s (2MASS "total")
20032MASX.C.......:
34.1 (a) arcsec ... ... 0.540 (b/a) ... ... ... -65
[J2000]
Diameter for "total" magnitude 1.38E+14 68.30 ... 0.54 0.46 0.55 57 115
[J2000]
3 POSS1 103a-O
1964MCG2..C...0000V
0.30 arcmin 0.15 arcmin ... ... ... ... ... Very high surface brightness 7.40E+14 18.00 ... 0.50 0.50 0.60 60 ...
4 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 ...
5 r (SDSS Isophotal)
2007SDSS6.C...0000:
35.48 (a) arcsec 12.87 arcsec ... ... ... ... 105.9
[J2000]
25.0 mag arcsec^-2^ 4.77E+14 70.96 ... 0.36 0.64 0.77 69 106
[J2000]
6 r (SDSS Petrosian)
2007SDSS6.C...0000:
5.14 (a) arcsec ... ... ... 0.678 ... ... ... ... 4.77E+14 10.28 1.35 ... ... ... ... ...
7 r (SDSS deVaucouleurs)
2007SDSS6.C...0000:
3.3298 (a) arcsec ... ... 0.471 (b/a) 0.021 ... ... 113.3
[J2000]
... 4.77E+14 6.66 0.04 0.47 0.53 0.64 62 113
[J2000]
8 r (SDSS Exponential)
2007SDSS6.C...0000:
2.4501 (a) arcsec ... ... 0.474 (b/a) 0.011 ... ... 114.9
[J2000]
... 4.77E+14 4.90 0.02 0.47 0.53 0.63 62 115
[J2000]


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 20032MASX.C.......:
Published Object Name         : 2MASX J09275435+2947303       
Frequency Targeted            : K_s (2MASS isophotal)         
Major Axis (2a)               : a = 17.3       arcsec               2a = 34.60 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : ...                                 2b = 18.68 arcsec
Uncertainty                   : ...                                 ...
Axis Ratio                    : b/a = 0.540                         b/a = 0.54
Uncertainty                   : ...                                 ...
Ellipticity                   : ...                                 1 - b/a = 0.46
Uncertainty                   : ...                                 ...
Eccentricity                  : ...                                 [(a/b)2-1]/[(a/b)2+1] = 0.55
Uncertainty                   : ...                                 ...
Cos-1(b/a)                    : ...                                 57 deg
Position Angle [Equinox]      :  -65   deg [J2000]                  115 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          : 141.976440      29.791794    (J2000)
Qualifiers                    : From new, raw data
NED Comment                   :                                         

No. 2 Published Units: Homogenized Units: Reference Code : 20032MASX.C.......: Published Object Name : 2MASX J09275435+2947303 Frequency Targeted : K_s (2MASS "total") Major Axis (2a) : a = 34.1 arcsec 2a = 68.30 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 36.88 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.540 b/a = 0.54 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.46 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.55 Uncertainty : ... ... Cos-1(b/a) : ... 57 deg Position Angle [Equinox] : -65 deg [J2000] 115 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 : 141.976440 29.791794 (J2000) Qualifiers : From new, raw data NED Comment :
No. 3 Published Units: Homogenized Units: Reference Code : 1964MCG2..C...0000V Published Object Name : MCG +05-22-049 Frequency Targeted : POSS1 103a-O Major Axis (2a) : 0.30 arcmin 2a = 18.00 arcsec Uncertainty : ... ... Minor Axis (2b) : 2b = 0.15 arcmin 2b = 9.00 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.50 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.50 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.60 Uncertainty : ... ... Cos-1(b/a) : ... 60 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 : 092454 +3001 (B1950) Qualifiers : From new, raw data NED Comment :
No. 4 Published Units: Homogenized Units: Reference Code : 1964MCG2..C...0000V Published Object Name : MCG +05-22-049 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 : 092454 +3001 (B1950) Qualifiers : From new, raw data NED Comment :
No. 5 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J092754.33+294730.6 Frequency Targeted : r (SDSS Isophotal) Major Axis (2a) : a = 35.48 arcsec 2a = 70.96 arcsec Uncertainty : ... ... Minor Axis (2b) : b = 12.87 arcsec 2b = 25.74 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.36 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.64 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.77 Uncertainty : ... ... Cos-1(b/a) : ... 69 deg Position Angle [Equinox] : 105.9 deg [J2000] 106 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 : 141.9763832183 29.7918603074 (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 J092754.33+294730.6 Frequency Targeted : r (SDSS Petrosian) Major Axis (2a) : a = 5.14 arcsec 2a = 10.28 arcsec Uncertainty : 0.678 arcsec 1.35 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 : 141.9763832183 29.7918603074 (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 J092754.33+294730.6 Frequency Targeted : r (SDSS deVaucouleurs) Major Axis (2a) : a = 3.3298 arcsec 2a = 6.66 arcsec Uncertainty : 0.021 arcsec 0.04 arcsec Minor Axis (2b) : ... 2b = 3.14 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.471 b/a = 0.47 Uncertainty : 0.003 0.00 Ellipticity : ... 1 - b/a = 0.53 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.64 Uncertainty : ... ... Cos-1(b/a) : ... 62 deg Position Angle [Equinox] : 113.3 deg [J2000] 113 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 : 141.9763832183 29.7918603074 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment : Effective (half-light) radius
No. 8 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J092754.33+294730.6 Frequency Targeted : r (SDSS Exponential) Major Axis (2a) : a = 2.4501 arcsec 2a = 4.90 arcsec Uncertainty : 0.011 arcsec 0.02 arcsec Minor Axis (2b) : ... 2b = 2.32 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.474 b/a = 0.47 Uncertainty : 0.001 0.00 Ellipticity : ... 1 - b/a = 0.53 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.63 Uncertainty : ... ... Cos-1(b/a) : ... 62 deg Position Angle [Equinox] : 114.9 deg [J2000] 115 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 : 141.9763832183 29.7918603074 (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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