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Date and Time of the Query: 2019-05-19 T23:45:48 PDT
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Diameter data point(s) for object NGC 6744

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 ESO-Uppsala "Quick Blue" IIa-O
1982ESOU..C...0000L
25.00 arcmin 15.00 arcmin ... ... ... ... 15
[B1950]
About 25.5 B-mag arcsec^-2^ 6.81E+14 1500.00 ... 0.60 0.40 0.47 53 14
[J2000]
2 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
933.25 arcsec ... ... 1.67 (a/b) ... ... ... 15.00
[B1950]
25.0 B-mag arcsec^-2^ 6.81E+14 933.25 ... 0.60 0.40 0.47 53 14
[J2000]
3 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
1109.18 arcsec ... ... 1.67 (a/b) ... ... ... 15.00
[B1950]
26.0 B-mag arcsec^-2^ 6.81E+14 1109.18 ... 0.60 0.40 0.47 53 14
[J2000]
4 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
645.65 arcsec ... ... 1.67 (a/b) ... ... ... 15.00
[B1950]
70% total B light 6.81E+14 645.65 ... 0.60 0.40 0.47 53 14
[J2000]
5 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
758.58 arcsec ... ... 1.67 (a/b) ... ... ... 15.00
[B1950]
80% total B light 6.81E+14 758.58 ... 0.60 0.40 0.47 53 14
[J2000]
6 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
933.25 arcsec ... ... 1.67 (a/b) ... ... ... 15.00
[B1950]
90% total B light 6.81E+14 933.25 ... 0.60 0.40 0.47 53 14
[J2000]
7 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
467.74 arcsec ... ... 1.67 (a/b) ... ... ... 15.00
[B1950]
50% total B light, major dia. 6.81E+14 467.74 ... 0.60 0.40 0.47 53 14
[J2000]
8 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
358.92 arcsec ... ... ... ... ... ... ... 50% total B light, aperture 6.81E+14 358.92 ... ... ... ... ... ...
9 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
97.87 arcsec ... ... ... ... ... ... ... B disk exp. scale length 6.81E+14 97.87 ... ... ... ... ... ...
10 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
157.69 arcsec ... ... 1.33 (a/b) ... ... ... 16.17
[B1950]
B exponential scale length 6.81E+14 157.69 ... 0.75 0.25 0.28 41 16
[J2000]
11 ESO-LV IIIa-F
1989ESOLV.C...0000L
119.96 arcsec ... ... ... ... ... ... ... R exponential scale length 4.68E+14 119.96 ... ... ... ... ... ...
12 RC3 D_25, R_25 (blue)
1991RC3.9.C...0000d
2.30 log(2a) + 1 ... ... 0.19
log(a/b)
0.01 ... ... 15
[J2000]
25.0 B-mag arcsec^-2^ 6.81E+14 1197.20 27.90 0.65 0.35 0.41 50 14
[J2000]
13 RC3 D_0 (blue)
1991RC3.9.C...0000d
2.31 log(2a) + 1 ... ... ... ... ... ... ... 25.0 B-mag arcsec^-2^ 6.81E+14 1225.00 ... ... ... ... ... ...
14 K_s (LGA/2MASS isophotal)
2003AJ....125..525J
217.2 (a) arcsec ... ... 0.500 (b/a) ... ... ... -2.5
[J2000]
20.0 K-mag arcsec^-2^ 1.38E+14 434.40 ... 0.50 0.50 0.60 60 178
[J2000]
15 K_s (LGA/2MASS "total")
2003AJ....125..525J
460.6 (a) arcsec ... ... 0.500 (b/a) ... ... ... -2.5
[J2000]
Diameter for "total" magnitude 1.38E+14 921.20 ... 0.50 0.50 0.60 60 178
[J2000]


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 1982ESOU..C...0000L
Published Object Name         : ESO 104- G 042                
Frequency Targeted            : ESO-Uppsala "Quick Blue" IIa-O
Major Axis (2a)               : 25.00      arcmin                   2a = 1500.00 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : 2b =  15.00     arcmin              2b = 900.00 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]      :  15    deg [B1950]                  14 deg [J2000]
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          : 190501.         -635612.    (B1950)
Qualifiers                    : From new, raw data
NED Comment                   : Diameters flagged uncertain.            

No. 2 Published Units: Homogenized Units: Reference Code : 1989ESOLV.C...0000L Published Object Name : ESO-LV 1040420 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 933.25 arcsec 2a = 933.25 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 1555.42 arcsec Uncertainty : ... ... Axis Ratio : a/b = 1.67 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] : 15.00 deg [B1950] 14 deg [J2000] 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 : Microphotometer scan of photographic plate or film Measured Quantity : Isophotal diameter Coordinates Targeted : 286.254181 -63.936668 (B1950) Qualifiers : From new, raw data; Corrected for contaminating sources NED Comment : Elliptical isophote
No. 3 Published Units: Homogenized Units: Reference Code : 1989ESOLV.C...0000L Published Object Name : ESO-LV 1040420 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 1109.18 arcsec 2a = 1109.18 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 1848.63 arcsec Uncertainty : ... ... Axis Ratio : a/b = 1.67 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] : 15.00 deg [B1950] 14 deg [J2000] Uncertainty : ... ... Significance : No uncertainty reported Diameter Reference Level : 26.0 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 : Microphotometer scan of photographic plate or film Measured Quantity : Isophotal diameter Coordinates Targeted : 286.254181 -63.936668 (B1950) Qualifiers : From new, raw data; Corrected for contaminating sources NED Comment : Elliptical isophote
No. 4 Published Units: Homogenized Units: Reference Code : 1989ESOLV.C...0000L Published Object Name : ESO-LV 1040420 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 645.65 arcsec 2a = 645.65 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 1076.08 arcsec Uncertainty : ... ... Axis Ratio : a/b = 1.67 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] : 15.00 deg [B1950] 14 deg [J2000] Uncertainty : ... ... Significance : No uncertainty reported Diameter Reference Level : 70% total B light 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 : Microphotometer scan of photographic plate or film Measured Quantity : Isophotal diameter Coordinates Targeted : 286.254181 -63.936668 (B1950) Qualifiers : From new, raw data; Corrected for contaminating sources NED Comment : Elliptical isophote
No. 5 Published Units: Homogenized Units: Reference Code : 1989ESOLV.C...0000L Published Object Name : ESO-LV 1040420 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 758.58 arcsec 2a = 758.58 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 1264.30 arcsec Uncertainty : ... ... Axis Ratio : a/b = 1.67 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] : 15.00 deg [B1950] 14 deg [J2000] Uncertainty : ... ... Significance : No uncertainty reported Diameter Reference Level : 80% total B light 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 : Microphotometer scan of photographic plate or film Measured Quantity : Isophotal diameter Coordinates Targeted : 286.254181 -63.936668 (B1950) Qualifiers : From new, raw data; Corrected for contaminating sources NED Comment : Elliptical isophote
No. 6 Published Units: Homogenized Units: Reference Code : 1989ESOLV.C...0000L Published Object Name : ESO-LV 1040420 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 933.25 arcsec 2a = 933.25 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 1555.42 arcsec Uncertainty : ... ... Axis Ratio : a/b = 1.67 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] : 15.00 deg [B1950] 14 deg [J2000] Uncertainty : ... ... Significance : No uncertainty reported Diameter Reference Level : 90% total B light 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 : Microphotometer scan of photographic plate or film Measured Quantity : Isophotal diameter Coordinates Targeted : 286.254181 -63.936668 (B1950) Qualifiers : From new, raw data; Corrected for contaminating sources NED Comment : Elliptical isophote
No. 7 Published Units: Homogenized Units: Reference Code : 1989ESOLV.C...0000L Published Object Name : ESO-LV 1040420 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 467.74 arcsec 2a = 467.74 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 779.57 arcsec Uncertainty : ... ... Axis Ratio : a/b = 1.67 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] : 15.00 deg [B1950] 14 deg [J2000] Uncertainty : ... ... Significance : No uncertainty reported Diameter Reference Level : 50% total B light, major dia. 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 : Microphotometer scan of photographic plate or film Measured Quantity : Half-light ("effective") diameter Coordinates Targeted : 286.254181 -63.936668 (B1950) Qualifiers : From new, raw data; Corrected for contaminating sources NED Comment : Elliptical isophote
No. 8 Published Units: Homogenized Units: Reference Code : 1989ESOLV.C...0000L Published Object Name : ESO-LV 1040420 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 358.92 arcsec 2a = 358.92 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 : 50% total B light, aperture 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 : Microphotometer scan of photographic plate or film Measured Quantity : Half-light ("effective") diameter Coordinates Targeted : 286.254181 -63.936668 (B1950) Qualifiers : From new, raw data; Corrected for contaminating sources NED Comment : Circular aperture
No. 9 Published Units: Homogenized Units: Reference Code : 1989ESOLV.C...0000L Published Object Name : ESO-LV 1040420 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 97.87 arcsec 2a = 97.87 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 : B disk exp. scale length 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 : Microphotometer scan of photographic plate or film Measured Quantity : Scale length Coordinates Targeted : 286.254181 -63.936668 (B1950) Qualifiers : From new, raw data; Corrected for contaminating sources NED Comment : From fits to surf. brightness in octants
No. 10 Published Units: Homogenized Units: Reference Code : 1989ESOLV.C...0000L Published Object Name : ESO-LV 1040420 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 157.69 arcsec 2a = 157.69 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 209.14 arcsec Uncertainty : ... ... Axis Ratio : a/b = 1.33 b/a = 0.75 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.25 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.28 Uncertainty : ... ... Cos-1(b/a) : ... 41 deg Position Angle [Equinox] : 16.17 deg [B1950] 16 deg [J2000] Uncertainty : ... ... Significance : No uncertainty reported Diameter Reference Level : B exponential scale length 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 : Microphotometer scan of photographic plate or film Measured Quantity : Scale length Coordinates Targeted : 286.254181 -63.936668 (B1950) Qualifiers : From new, raw data; Corrected for contaminating sources NED Comment : Elliptical isophote
No. 11 Published Units: Homogenized Units: Reference Code : 1989ESOLV.C...0000L Published Object Name : ESO-LV 1040420 Frequency Targeted : ESO-LV IIIa-F Major Axis (2a) : 119.96 arcsec 2a = 119.96 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 : R exponential scale length Frequency : 6400 A 4.68E+14 Hz Frequency Mode : Broad-band detector (e.g. photographic plate) Measurement Mode Detector Type : Photographic plate, print, or film Fitting Technique : Microphotometer scan of photographic plate or film Measured Quantity : Scale length Coordinates Targeted : 286.254181 -63.936668 (B1950) Qualifiers : From new, raw data; Corrected for contaminating sources NED Comment : From fits to surf. brightness in octants
No. 12 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : ESO 104- G 042 Frequency Targeted : RC3 D_25, R_25 (blue) Major Axis (2a) : log(2a) + 1 = 2.30 2a = 1197.20 arcsec Uncertainty : 0.01 27.90 arcsec Minor Axis (2b) : ... 2b = 773.39 arcsec Uncertainty : ... ... Axis Ratio : log(a/b) = 0.19 b/a = 0.65 Uncertainty : 0.02 0.03 Ellipticity : ... 1 - b/a = 0.35 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.41 Uncertainty : ... ... Cos-1(b/a) : ... 50 deg Position Angle [Equinox] : 15 deg [J2000] 14 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 : 190945.4 -635122. (J2000) Qualifiers : Homogenized from previously published data NED Comment :
No. 13 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : ESO 104- G 042 Frequency Targeted : RC3 D_0 (blue) Major Axis (2a) : log(2a) + 1 = 2.31 2a = 1225.00 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 : 190945.4 -635122. (J2000) Qualifiers : Homogenized from previously published data NED Comment : Extinction and inclination corrected.
No. 14 Published Units: Homogenized Units: Reference Code : 2003AJ....125..525J Published Object Name : NGC 6744 Frequency Targeted : K_s (LGA/2MASS isophotal) Major Axis (2a) : a = 217.2 arcsec 2a = 434.40 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 217.20 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.500 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] : -2.5 deg [J2000] 178 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 : 287.442078 -63.857540 (J2000) Qualifiers : From new, raw data NED Comment :
No. 15 Published Units: Homogenized Units: Reference Code : 2003AJ....125..525J Published Object Name : NGC 6744 Frequency Targeted : K_s (LGA/2MASS "total") Major Axis (2a) : a = 460.6 arcsec 2a = 921.20 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 460.60 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.500 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] : -2.5 deg [J2000] 178 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 : 287.442078 -63.857540 (J2000) Qualifiers : From new, raw data NED Comment :

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