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Date and Time of the Query: 2019-04-22 T21:31:30 PDT
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Diameter data point(s) for object NGC 7103

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.......:
29.9 (a) arcsec ... ... 0.800 (b/a) ... ... ... 75
[J2000]
20.0 K-mag arcsec^-2^ 1.38E+14 59.80 ... 0.80 0.20 0.22 37 75
[J2000]
2 K_s (2MASS "total")
20032MASX.C.......:
48.3 (a) arcsec ... ... 0.800 (b/a) ... ... ... 75
[J2000]
Diameter for "total" magnitude 1.38E+14 96.60 ... 0.80 0.20 0.22 37 75
[J2000]
3 ESO-Uppsala "Quick Blue" IIa-O
1982ESOU..C...0000L
1.20 arcmin 1.20 arcmin ... ... ... ... ... About 25.5 B-mag arcsec^-2^ 6.81E+14 72.00 ... 1.00 0.00 0.00 0 ...
4 RC3 D_25, R_25 (blue)
1991RC3.9.C...0000d
1.13 log(2a) + 1 ... ... 0.04
log(a/b)
0.08 ... ... ... 25.0 B-mag arcsec^-2^ 6.81E+14 80.90 16.40 0.91 0.09 0.09 24 ...
5 RC3 D_0 (blue)
1991RC3.9.C...0000d
1.13 log(2a) + 1 ... ... ... ... ... ... ... 25.0 B-mag arcsec^-2^ 6.81E+14 80.90 ... ... ... ... ... ...


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 20032MASX.C.......:
Published Object Name         : 2MASX J21395143-2228251       
Frequency Targeted            : K_s (2MASS isophotal)         
Major Axis (2a)               : a = 29.9       arcsec               2a = 59.80 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : ...                                 2b = 47.84 arcsec
Uncertainty                   : ...                                 ...
Axis Ratio                    : b/a = 0.800                         b/a = 0.80
Uncertainty                   : ...                                 ...
Ellipticity                   : ...                                 1 - b/a = 0.20
Uncertainty                   : ...                                 ...
Eccentricity                  : ...                                 [(a/b)2-1]/[(a/b)2+1] = 0.22
Uncertainty                   : ...                                 ...
Cos-1(b/a)                    : ...                                 37 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          : 324.964294      -22.473694    (J2000)
Qualifiers                    : From new, raw data
NED Comment                   :                                         

No. 2 Published Units: Homogenized Units: Reference Code : 20032MASX.C.......: Published Object Name : 2MASX J21395143-2228251 Frequency Targeted : K_s (2MASS "total") Major Axis (2a) : a = 48.3 arcsec 2a = 96.60 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 77.28 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.800 b/a = 0.80 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.20 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.22 Uncertainty : ... ... Cos-1(b/a) : ... 37 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 : 324.964294 -22.473694 (J2000) Qualifiers : From new, raw data NED Comment :
No. 3 Published Units: Homogenized Units: Reference Code : 1982ESOU..C...0000L Published Object Name : ESO 531- G 015 Frequency Targeted : ESO-Uppsala "Quick Blue" IIa-O Major Axis (2a) : 1.20 arcmin 2a = 72.00 arcsec Uncertainty : ... ... Minor Axis (2b) : 2b = 1.20 arcmin 2b = 72.00 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 : About 25.5 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 : "Outer" diameter Coordinates Targeted : 213701. -224200. (B1950) Qualifiers : From new, raw data NED Comment : Diameters flagged uncertain.
No. 4 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : ESO 531- G 015 Frequency Targeted : RC3 D_25, R_25 (blue) Major Axis (2a) : log(2a) + 1 = 1.13 2a = 80.90 arcsec Uncertainty : 0.08 16.40 arcsec Minor Axis (2b) : ... 2b = 73.78 arcsec Uncertainty : ... ... Axis Ratio : log(a/b) = 0.04 b/a = 0.91 Uncertainty : 0.06 0.14 Ellipticity : ... 1 - b/a = 0.09 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.09 Uncertainty : ... ... Cos-1(b/a) : ... 24 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 : 213950.9 -222823. (J2000) Qualifiers : Homogenized from previously published data NED Comment :
No. 5 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : ESO 531- G 015 Frequency Targeted : RC3 D_0 (blue) Major Axis (2a) : log(2a) + 1 = 1.13 2a = 80.90 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 : 213950.9 -222823. (J2000) Qualifiers : Homogenized from previously published data NED Comment : Extinction and inclination corrected.

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