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Date and Time of the Query: 2019-04-20 T19:28:10 PDT
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Diameter data point(s) for object NGC 2774

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.......:
20.9 (a) arcsec ... ... 0.960 (b/a) ... ... ... -5
[J2000]
20.0 K-mag arcsec^-2^ 1.38E+14 41.80 ... 0.96 0.04 0.04 16 175
[J2000]
2 K_s (2MASS "total")
20032MASX.C.......:
33.6 (a) arcsec ... ... 0.960 (b/a) ... ... ... -5
[J2000]
Diameter for "total" magnitude 1.38E+14 67.30 ... 0.96 0.04 0.04 16 175
[J2000]
3 POSS1 103a-O
1964MCG2..C...0000V
0.40 arcmin 0.35 arcmin ... ... ... ... ... Very high surface brightness 7.40E+14 24.00 ... 0.88 0.12 0.13 29 ...
4 POSS1 103a-O
1964MCG2..C...0000V
0.80 arcmin 0.80 arcmin ... ... ... ... ... Moderate surface brightness 7.40E+14 48.00 ... 1.00 0.00 0.00 0 ...
5 r (SDSS Isophotal)
2007SDSS6.C...0000:
33.93 (a) arcsec 31.99 arcsec ... ... ... ... 61.2
[J2000]
25.0 mag arcsec^-2^ 4.77E+14 67.87 ... 0.94 0.06 0.06 19 61
[J2000]
6 r (SDSS Petrosian)
2007SDSS6.C...0000:
7.48 (a) arcsec ... ... ... 0.037 ... ... ... ... 4.77E+14 14.97 0.07 ... ... ... ... ...
7 r (SDSS deVaucouleurs)
2007SDSS6.C...0000:
4.2340 (a) arcsec ... ... 0.969 (b/a) 0.021 ... ... 66.8
[J2000]
... 4.77E+14 8.47 0.04 0.97 0.03 0.03 14 67
[J2000]
8 r (SDSS Exponential)
2007SDSS6.C...0000:
2.8724 (a) arcsec ... ... 0.970 (b/a) 0.009 ... ... 64.0
[J2000]
... 4.77E+14 5.75 0.02 0.97 0.03 0.03 14 64
[J2000]


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 20032MASX.C.......:
Published Object Name         : 2MASX J09103992+1841475       
Frequency Targeted            : K_s (2MASS isophotal)         
Major Axis (2a)               : a = 20.9       arcsec               2a = 41.80 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : ...                                 2b = 40.13 arcsec
Uncertainty                   : ...                                 ...
Axis Ratio                    : b/a = 0.960                         b/a = 0.96
Uncertainty                   : ...                                 ...
Ellipticity                   : ...                                 1 - b/a = 0.04
Uncertainty                   : ...                                 ...
Eccentricity                  : ...                                 [(a/b)2-1]/[(a/b)2+1] = 0.04
Uncertainty                   : ...                                 ...
Cos-1(b/a)                    : ...                                 16 deg
Position Angle [Equinox]      :   -5   deg [J2000]                  175 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          : 137.666336      18.696568    (J2000)
Qualifiers                    : From new, raw data
NED Comment                   :                                         

No. 2 Published Units: Homogenized Units: Reference Code : 20032MASX.C.......: Published Object Name : 2MASX J09103992+1841475 Frequency Targeted : K_s (2MASS "total") Major Axis (2a) : a = 33.6 arcsec 2a = 67.30 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 64.61 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.960 b/a = 0.96 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.04 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.04 Uncertainty : ... ... Cos-1(b/a) : ... 16 deg Position Angle [Equinox] : -5 deg [J2000] 175 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 : 137.666336 18.696568 (J2000) Qualifiers : From new, raw data NED Comment :
No. 3 Published Units: Homogenized Units: Reference Code : 1964MCG2..C...0000V Published Object Name : MCG +03-24-004 Frequency Targeted : POSS1 103a-O Major Axis (2a) : 0.40 arcmin 2a = 24.00 arcsec Uncertainty : ... ... Minor Axis (2b) : 2b = 0.35 arcmin 2b = 21.00 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.88 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.12 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.13 Uncertainty : ... ... Cos-1(b/a) : ... 29 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 : 090754 +1854 (B1950) Qualifiers : From new, raw data NED Comment :
No. 4 Published Units: Homogenized Units: Reference Code : 1964MCG2..C...0000V Published Object Name : MCG +03-24-004 Frequency Targeted : POSS1 103a-O Major Axis (2a) : 0.80 arcmin 2a = 48.00 arcsec Uncertainty : ... ... Minor Axis (2b) : 2b = 0.80 arcmin 2b = 48.00 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 1.00 Uncertainty : ... ... 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] : ... ... Uncertainty : ... ... Significance : No uncertainty reported Diameter Reference Level : Moderate 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 : 090754 +1854 (B1950) Qualifiers : From new, raw data NED Comment :
No. 5 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J091039.92+184147.7 Frequency Targeted : r (SDSS Isophotal) Major Axis (2a) : a = 33.93 arcsec 2a = 67.87 arcsec Uncertainty : ... ... Minor Axis (2b) : b = 31.99 arcsec 2b = 63.99 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.94 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.06 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.06 Uncertainty : ... ... Cos-1(b/a) : ... 19 deg Position Angle [Equinox] : 61.2 deg [J2000] 61 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 : 137.6663518301 18.6965924569 (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 J091039.92+184147.7 Frequency Targeted : r (SDSS Petrosian) Major Axis (2a) : a = 7.48 arcsec 2a = 14.97 arcsec Uncertainty : 0.037 arcsec 0.07 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 : 137.6663518301 18.6965924569 (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 J091039.92+184147.7 Frequency Targeted : r (SDSS deVaucouleurs) Major Axis (2a) : a = 4.2340 arcsec 2a = 8.47 arcsec Uncertainty : 0.021 arcsec 0.04 arcsec Minor Axis (2b) : ... 2b = 8.21 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.969 b/a = 0.97 Uncertainty : 0.005 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] : 66.8 deg [J2000] 67 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 : 137.6663518301 18.6965924569 (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 J091039.92+184147.7 Frequency Targeted : r (SDSS Exponential) Major Axis (2a) : a = 2.8724 arcsec 2a = 5.75 arcsec Uncertainty : 0.009 arcsec 0.02 arcsec Minor Axis (2b) : ... 2b = 5.57 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.970 b/a = 0.97 Uncertainty : 0.004 0.00 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] : 64.0 deg [J2000] 64 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 : 137.6663518301 18.6965924569 (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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