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Date and Time of the Query: 2019-03-25 T11:25:06 PDT
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Diameter data point(s) for object NGC 2903

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 POSS1 103a-O
1973UGC...C...0000N
13.30 arcmin 6.00 arcmin ... ... ... ... 17
[B1950]
About 25.0 B-mag arcsec^-2^ 7.40E+14 798.00 ... 0.45 0.55 0.66 63 17
[J2000]
2 POSS1 103a-O
1964MCG2..C...0000V
5.00 arcmin 3.00 arcmin ... ... ... ... ... Very high surface brightness 7.40E+14 300.00 ... 0.60 0.40 0.47 53 ...
3 POSS1 103a-O
1964MCG2..C...0000V
13.00 arcmin 5.00 arcmin ... ... ... ... ... Low surface brightness 7.40E+14 780.00 ... 0.39 0.61 0.74 67 ...
4 RC3 D_25, R_25 (blue)
1991RC3.9.C...0000d
2.10 log(2a) + 1 ... ... 0.32
log(a/b)
0.01 ... ... 17
[J2000]
25.0 B-mag arcsec^-2^ 6.81E+14 755.40 17.60 0.48 0.52 0.63 61 17
[J2000]
5 RC3 A_e (Johnson B)
1991RC3.9.C...0000d
1.47 log(2a) + 1 ... ... ... 0.01 ... ... ... ... 6.81E+14 177.10 4.10 ... ... ... ... ...
6 RC3 D_0 (blue)
1991RC3.9.C...0000d
2.10 log(2a) + 1 ... ... ... ... ... ... ... 25.0 B-mag arcsec^-2^ 6.81E+14 755.40 ... ... ... ... ... ...
7 K_s (LGA/2MASS isophotal)
2003AJ....125..525J
163.0 (a) arcsec ... ... 0.540 (b/a) ... ... ... 12.5
[J2000]
20.0 K-mag arcsec^-2^ 1.38E+14 326.00 ... 0.54 0.46 0.55 57 13
[J2000]
8 K_s (LGA/2MASS "total")
2003AJ....125..525J
247.2 (a) arcsec ... ... 0.540 (b/a) ... ... ... 12.5
[J2000]
Diameter for "total" magnitude 1.38E+14 494.40 ... 0.54 0.46 0.55 57 13
[J2000]


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 1973UGC...C...0000N
Published Object Name         : UGC 05079                     
Frequency Targeted            : POSS1 103a-O                  
Major Axis (2a)               : 13.30      arcmin                   2a = 798.00 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : 2b =  6.00      arcmin              2b = 360.00 arcsec 
Uncertainty                   : ...                                 ...
Axis Ratio                    : ...                                 b/a = 0.45
Uncertainty                   : ...                                 ...
Ellipticity                   : ...                                 1 - b/a = 0.55
Uncertainty                   : ...                                 ...
Eccentricity                  : ...                                 [(a/b)2-1]/[(a/b)2+1] = 0.66
Uncertainty                   : ...                                 ...
Cos-1(b/a)                    : ...                                 63 deg
Position Angle [Equinox]      :  17    deg [B1950]                  17 deg [J2000]
Uncertainty                   : ...                                 ...
Significance                  : No uncertainty reported
Diameter Reference Level      : About 25.0 B-mag arcsec^-2^   
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          : 092924.         +214400.    (B1950)
Qualifiers                    : From new, raw data
NED Comment                   :                                         

No. 2 Published Units: Homogenized Units: Reference Code : 1964MCG2..C...0000V Published Object Name : MCG +04-23-009 Frequency Targeted : POSS1 103a-O Major Axis (2a) : 5.00 arcmin 2a = 300.00 arcsec Uncertainty : ... ... Minor Axis (2b) : 2b = 3.00 arcmin 2b = 180.00 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.60 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.40 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.47 Uncertainty : ... ... Cos-1(b/a) : ... 53 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 : 092924 +2144 (B1950) Qualifiers : From new, raw data NED Comment :
No. 3 Published Units: Homogenized Units: Reference Code : 1964MCG2..C...0000V Published Object Name : MCG +04-23-009 Frequency Targeted : POSS1 103a-O Major Axis (2a) : 13.00 arcmin 2a = 780.00 arcsec Uncertainty : ... ... Minor Axis (2b) : 2b = 5.00 arcmin 2b = 300.00 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.39 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.61 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.74 Uncertainty : ... ... Cos-1(b/a) : ... 67 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 : 092924 +2144 (B1950) Qualifiers : From new, raw data NED Comment :
No. 4 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : UGC 05079 Frequency Targeted : RC3 D_25, R_25 (blue) Major Axis (2a) : log(2a) + 1 = 2.10 2a = 755.40 arcsec Uncertainty : 0.01 17.60 arcsec Minor Axis (2b) : ... 2b = 361.84 arcsec Uncertainty : ... ... Axis Ratio : log(a/b) = 0.32 b/a = 0.48 Uncertainty : 0.02 0.02 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] : 17 deg [J2000] 17 deg [J2000] 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 : 093209.7 +213002. (J2000) Qualifiers : Homogenized from previously published data NED Comment :
No. 5 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : UGC 05079 Frequency Targeted : RC3 A_e (Johnson B) Major Axis (2a) : log(2a) + 1 = 1.47 2a = 177.10 arcsec Uncertainty : 0.01 4.10 arcsec Minor Axis (2b) : ... ... Uncertainty : ... ... Axis Ratio : ... ... Uncertainty : ... ... Ellipticity : ... ... Uncertainty : ... ... Eccentricity : ... ... Uncertainty : ... ... Cos-1(b/a) : ... ... Position Angle [Equinox] : ... ... Uncertainty : ... ... Significance : Mean error Diameter Reference Level : ... 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 : 093209.7 +213002. (J2000) Qualifiers : From new, raw data NED Comment : From magnitude-aperture curves.
No. 6 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : UGC 05079 Frequency Targeted : RC3 D_0 (blue) Major Axis (2a) : log(2a) + 1 = 2.10 2a = 755.40 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 : 093209.7 +213002. (J2000) Qualifiers : Homogenized from previously published data NED Comment : Extinction and inclination corrected.
No. 7 Published Units: Homogenized Units: Reference Code : 2003AJ....125..525J Published Object Name : NGC 2903 Frequency Targeted : K_s (LGA/2MASS isophotal) Major Axis (2a) : a = 163.0 arcsec 2a = 326.00 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 176.04 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] : 12.5 deg [J2000] 13 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 : 143.042130 21.500830 (J2000) Qualifiers : From new, raw data NED Comment :
No. 8 Published Units: Homogenized Units: Reference Code : 2003AJ....125..525J Published Object Name : NGC 2903 Frequency Targeted : K_s (LGA/2MASS "total") Major Axis (2a) : a = 247.2 arcsec 2a = 494.40 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 266.98 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] : 12.5 deg [J2000] 13 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 : 143.042130 21.500830 (J2000) Qualifiers : From new, raw data NED Comment :

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