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Date and Time of the Query: 2019-04-19 T21:17:04 PDT
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Diameter data point(s) for object NGC 2741

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.......:
12.2 (a) arcsec ... ... 0.480 (b/a) ... ... ... 75
[J2000]
20.0 K-mag arcsec^-2^ 1.38E+14 24.40 ... 0.48 0.52 0.63 61 75
[J2000]
2 K_s (2MASS "total")
20032MASX.C.......:
22.1 (a) arcsec ... ... 0.480 (b/a) ... ... ... 75
[J2000]
Diameter for "total" magnitude 1.38E+14 44.30 ... 0.48 0.52 0.63 61 75
[J2000]
3 r (SDSS Isophotal)
2007SDSS6.C...0000:
1.76 (a) arcsec 1.67 arcsec ... ... ... ... 114.3
[J2000]
25.0 mag arcsec^-2^ 4.77E+14 3.52 ... 0.95 0.05 0.05 18 114
[J2000]
4 r (SDSS Petrosian)
2007SDSS6.C...0000:
0.39 (a) arcsec ... ... ... 0.014 ... ... ... ... 4.77E+14 0.78 0.03 ... ... ... ... ...
5 r (SDSS deVaucouleurs)
2007SDSS6.C...0000:
0.0208 (a) arcsec ... ... 0.837 (b/a) 0.126 ... ... 113.3
[J2000]
... 4.77E+14 0.04 0.25 0.84 0.16 0.18 33 113
[J2000]
6 r (SDSS Exponential)
2007SDSS6.C...0000:
0.0227 (a) arcsec ... ... 0.873 (b/a) 0.131 ... ... 113.2
[J2000]
... 4.77E+14 0.04 0.26 0.87 0.13 0.13 29 113
[J2000]


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 20032MASX.C.......:
Published Object Name         : 2MASX J09031650+1815401       
Frequency Targeted            : K_s (2MASS isophotal)         
Major Axis (2a)               : a = 12.2       arcsec               2a = 24.40 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : ...                                 2b = 11.71 arcsec
Uncertainty                   : ...                                 ...
Axis Ratio                    : b/a = 0.480                         b/a = 0.48
Uncertainty                   : ...                                 ...
Ellipticity                   : ...                                 1 - b/a = 0.52
Uncertainty                   : ...                                 ...
Eccentricity                  : ...                                 [(a/b)2-1]/[(a/b)2+1] = 0.63
Uncertainty                   : ...                                 ...
Cos-1(b/a)                    : ...                                 61 deg
Position Angle [Equinox]      :   75   deg [J2000]                  75 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          : 135.818817      18.261145    (J2000)
Qualifiers                    : From new, raw data
NED Comment                   :                                         

No. 2 Published Units: Homogenized Units: Reference Code : 20032MASX.C.......: Published Object Name : 2MASX J09031650+1815401 Frequency Targeted : K_s (2MASS "total") Major Axis (2a) : a = 22.1 arcsec 2a = 44.30 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 21.26 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.480 b/a = 0.48 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.52 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.63 Uncertainty : ... ... Cos-1(b/a) : ... 61 deg Position Angle [Equinox] : 75 deg [J2000] 75 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 : 135.818817 18.261145 (J2000) Qualifiers : From new, raw data NED Comment :
No. 3 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J090316.37+181539.9 Frequency Targeted : r (SDSS Isophotal) Major Axis (2a) : a = 1.76 arcsec 2a = 3.52 arcsec Uncertainty : ... ... Minor Axis (2b) : b = 1.67 arcsec 2b = 3.34 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.95 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.05 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.05 Uncertainty : ... ... Cos-1(b/a) : ... 18 deg Position Angle [Equinox] : 114.3 deg [J2000] 114 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 : 135.8182085007 18.2610875758 (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 J090316.37+181539.9 Frequency Targeted : r (SDSS Petrosian) Major Axis (2a) : a = 0.39 arcsec 2a = 0.78 arcsec Uncertainty : 0.014 arcsec 0.03 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 : 135.8182085007 18.2610875758 (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 J090316.37+181539.9 Frequency Targeted : r (SDSS deVaucouleurs) Major Axis (2a) : a = 0.0208 arcsec 2a = 0.04 arcsec Uncertainty : 0.126 arcsec 0.25 arcsec Minor Axis (2b) : ... 2b = 0.04 arcsec Uncertainty : ... 0.56 Axis Ratio : b/a = 0.837 b/a = 0.84 Uncertainty : 2.236 2.24 Ellipticity : ... 1 - b/a = 0.16 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.18 Uncertainty : ... ... Cos-1(b/a) : ... 33 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 : 135.8182085007 18.2610875758 (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 J090316.37+181539.9 Frequency Targeted : r (SDSS Exponential) Major Axis (2a) : a = 0.0227 arcsec 2a = 0.04 arcsec Uncertainty : 0.131 arcsec 0.26 arcsec Minor Axis (2b) : ... 2b = 0.04 arcsec Uncertainty : ... 0.47 Axis Ratio : b/a = 0.873 b/a = 0.87 Uncertainty : 1.814 1.81 Ellipticity : ... 1 - b/a = 0.13 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.13 Uncertainty : ... ... Cos-1(b/a) : ... 29 deg Position Angle [Equinox] : 113.2 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 : 135.8182085007 18.2610875758 (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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