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Date and Time of the Query: 2019-08-18 T18:40:10 PDT
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Diameter data point(s) for object NGC 1566

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
13.00 arcmin 9.00 arcmin ... ... ... ... 60
[B1950]
About 25.5 B-mag arcsec^-2^ 6.81E+14 780.00 ... 0.69 0.31 0.35 46 60
[J2000]
2 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
421.70 arcsec ... ... 1.44 (a/b) ... ... ... 60.00
[B1950]
25.0 B-mag arcsec^-2^ 6.81E+14 421.70 ... 0.69 0.31 0.35 46 60
[J2000]
3 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
616.59 arcsec ... ... 1.44 (a/b) ... ... ... 60.00
[B1950]
26.0 B-mag arcsec^-2^ 6.81E+14 616.59 ... 0.69 0.31 0.35 46 60
[J2000]
4 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
776.25 arcsec ... ... 1.44 (a/b) ... ... ... 60.00
[B1950]
27.0 B-mag arcsec^-2^ 6.81E+14 776.25 ... 0.69 0.31 0.35 46 60
[J2000]
5 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
266.07 arcsec ... ... 1.44 (a/b) ... ... ... 60.00
[B1950]
70% total B light 6.81E+14 266.07 ... 0.69 0.31 0.35 46 60
[J2000]
6 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
371.54 arcsec ... ... 1.44 (a/b) ... ... ... 60.00
[B1950]
80% total B light 6.81E+14 371.54 ... 0.69 0.31 0.35 46 60
[J2000]
7 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
582.10 arcsec ... ... 1.44 (a/b) ... ... ... 60.00
[B1950]
90% total B light 6.81E+14 582.10 ... 0.69 0.31 0.35 46 60
[J2000]
8 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
181.97 arcsec ... ... 1.44 (a/b) ... ... ... 60.00
[B1950]
50% total B light, major dia. 6.81E+14 181.97 ... 0.69 0.31 0.35 46 60
[J2000]
9 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
139.64 arcsec ... ... ... ... ... ... ... 50% total B light, aperture 6.81E+14 139.64 ... ... ... ... ... ...
10 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
38.82 arcsec ... ... ... ... ... ... ... B disk exp. scale length 6.81E+14 38.82 ... ... ... ... ... ...
11 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
50.80 arcsec ... ... 1.49 (a/b) ... ... ... 2.98
[B1950]
B exponential scale length 6.81E+14 50.80 ... 0.67 0.33 0.38 48 3
[J2000]
12 ESO-LV IIIa-F
1989ESOLV.C...0000L
20.35 arcsec ... ... ... ... ... ... ... R exponential scale length 4.68E+14 20.35 ... ... ... ... ... ...
13 RC3 D_25, R_25 (blue)
1991RC3.9.C...0000d
1.92 log(2a) + 1 ... ... 0.10
log(a/b)
0.02 ... ... 60
[J2000]
25.0 B-mag arcsec^-2^ 6.81E+14 499.10 23.50 0.79 0.21 0.23 37 60
[J2000]
14 RC3 A_e (Johnson B)
1991RC3.9.C...0000d
1.34 log(2a) + 1 ... ... ... 0.03 ... ... ... ... 6.81E+14 131.30 9.40 ... ... ... ... ...
15 RC3 D_0 (blue)
1991RC3.9.C...0000d
1.92 log(2a) + 1 ... ... ... ... ... ... ... 25.0 B-mag arcsec^-2^ 6.81E+14 499.10 ... ... ... ... ... ...
16 K_s (LGA/2MASS isophotal)
2003AJ....125..525J
113.3 (a) arcsec ... ... 0.950 (b/a) ... ... ... -10.0
[J2000]
20.0 K-mag arcsec^-2^ 1.38E+14 226.60 ... 0.95 0.05 0.05 18 170
[J2000]
17 K_s (LGA/2MASS "total")
2003AJ....125..525J
220.1 (a) arcsec ... ... 0.950 (b/a) ... ... ... -10.0
[J2000]
Diameter for "total" magnitude 1.38E+14 440.20 ... 0.95 0.05 0.05 18 170
[J2000]


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 1982ESOU..C...0000L
Published Object Name         : ESO 157- G 020                
Frequency Targeted            : ESO-Uppsala "Quick Blue" IIa-O
Major Axis (2a)               : 13.00      arcmin                   2a = 780.00 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : 2b =   9.00     arcmin              2b = 540.00 arcsec 
Uncertainty                   : ...                                 ...
Axis Ratio                    : ...                                 b/a = 0.69
Uncertainty                   : ...                                 ...
Ellipticity                   : ...                                 1 - b/a = 0.31
Uncertainty                   : ...                                 ...
Eccentricity                  : ...                                 [(a/b)2-1]/[(a/b)2+1] = 0.35
Uncertainty                   : ...                                 ...
Cos-1(b/a)                    : ...                                 46 deg
Position Angle [Equinox]      :  60    deg [B1950]                  60 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          : 041853.         -550324.    (B1950)
Qualifiers                    : From new, raw data
NED Comment                   : Diameters and PA flagged uncertain.     

No. 2 Published Units: Homogenized Units: Reference Code : 1989ESOLV.C...0000L Published Object Name : ESO-LV 1570200 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 421.70 arcsec 2a = 421.70 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 609.39 arcsec Uncertainty : ... ... Axis Ratio : a/b = 1.44 b/a = 0.69 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.31 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.35 Uncertainty : ... ... Cos-1(b/a) : ... 46 deg Position Angle [Equinox] : 60.00 deg [B1950] 60 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 : 64.720833 -55.056667 (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 1570200 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 616.59 arcsec 2a = 616.59 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 891.03 arcsec Uncertainty : ... ... Axis Ratio : a/b = 1.44 b/a = 0.69 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.31 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.35 Uncertainty : ... ... Cos-1(b/a) : ... 46 deg Position Angle [Equinox] : 60.00 deg [B1950] 60 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 : 64.720833 -55.056667 (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 1570200 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 776.25 arcsec 2a = 776.25 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 1121.75 arcsec Uncertainty : ... ... Axis Ratio : a/b = 1.44 b/a = 0.69 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.31 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.35 Uncertainty : ... ... Cos-1(b/a) : ... 46 deg Position Angle [Equinox] : 60.00 deg [B1950] 60 deg [J2000] Uncertainty : ... ... Significance : No uncertainty reported Diameter Reference Level : 27.0 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 : 64.720833 -55.056667 (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 1570200 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 266.07 arcsec 2a = 266.07 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 384.49 arcsec Uncertainty : ... ... Axis Ratio : a/b = 1.44 b/a = 0.69 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.31 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.35 Uncertainty : ... ... Cos-1(b/a) : ... 46 deg Position Angle [Equinox] : 60.00 deg [B1950] 60 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 : 64.720833 -55.056667 (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 1570200 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 371.54 arcsec 2a = 371.54 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 536.91 arcsec Uncertainty : ... ... Axis Ratio : a/b = 1.44 b/a = 0.69 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.31 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.35 Uncertainty : ... ... Cos-1(b/a) : ... 46 deg Position Angle [Equinox] : 60.00 deg [B1950] 60 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 : 64.720833 -55.056667 (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 1570200 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 582.10 arcsec 2a = 582.10 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 841.18 arcsec Uncertainty : ... ... Axis Ratio : a/b = 1.44 b/a = 0.69 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.31 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.35 Uncertainty : ... ... Cos-1(b/a) : ... 46 deg Position Angle [Equinox] : 60.00 deg [B1950] 60 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 : 64.720833 -55.056667 (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 1570200 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 181.97 arcsec 2a = 181.97 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 262.96 arcsec Uncertainty : ... ... Axis Ratio : a/b = 1.44 b/a = 0.69 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.31 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.35 Uncertainty : ... ... Cos-1(b/a) : ... 46 deg Position Angle [Equinox] : 60.00 deg [B1950] 60 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 : 64.720833 -55.056667 (B1950) Qualifiers : From new, raw data; Corrected for contaminating sources NED Comment : Elliptical isophote
No. 9 Published Units: Homogenized Units: Reference Code : 1989ESOLV.C...0000L Published Object Name : ESO-LV 1570200 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 139.64 arcsec 2a = 139.64 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 : 64.720833 -55.056667 (B1950) Qualifiers : From new, raw data; Corrected for contaminating sources NED Comment : Circular aperture
No. 10 Published Units: Homogenized Units: Reference Code : 1989ESOLV.C...0000L Published Object Name : ESO-LV 1570200 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 38.82 arcsec 2a = 38.82 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 : 64.720833 -55.056667 (B1950) Qualifiers : From new, raw data; Corrected for contaminating sources NED Comment : From fits to surf. brightness in octants
No. 11 Published Units: Homogenized Units: Reference Code : 1989ESOLV.C...0000L Published Object Name : ESO-LV 1570200 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 50.80 arcsec 2a = 50.80 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 75.48 arcsec Uncertainty : ... ... Axis Ratio : a/b = 1.49 b/a = 0.67 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.33 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.38 Uncertainty : ... ... Cos-1(b/a) : ... 48 deg Position Angle [Equinox] : 2.98 deg [B1950] 3 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 : 64.720833 -55.056667 (B1950) Qualifiers : From new, raw data; Corrected for contaminating sources NED Comment : Elliptical isophote
No. 12 Published Units: Homogenized Units: Reference Code : 1989ESOLV.C...0000L Published Object Name : ESO-LV 1570200 Frequency Targeted : ESO-LV IIIa-F Major Axis (2a) : 20.35 arcsec 2a = 20.35 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 : 64.720833 -55.056667 (B1950) Qualifiers : From new, raw data; Corrected for contaminating sources NED Comment : From fits to surf. brightness in octants
No. 13 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : ESO 157- G 020 Frequency Targeted : RC3 D_25, R_25 (blue) Major Axis (2a) : log(2a) + 1 = 1.92 2a = 499.10 arcsec Uncertainty : 0.02 23.50 arcsec Minor Axis (2b) : ... 2b = 396.29 arcsec Uncertainty : ... ... Axis Ratio : log(a/b) = 0.10 b/a = 0.79 Uncertainty : 0.02 0.04 Ellipticity : ... 1 - b/a = 0.21 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.23 Uncertainty : ... ... Cos-1(b/a) : ... 37 deg Position Angle [Equinox] : 60 deg [J2000] 60 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 : 042000.4 -545618. (J2000) Qualifiers : Homogenized from previously published data NED Comment :
No. 14 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : ESO 157- G 020 Frequency Targeted : RC3 A_e (Johnson B) Major Axis (2a) : log(2a) + 1 = 1.34 2a = 131.30 arcsec Uncertainty : 0.03 9.40 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 : 042000.4 -545618. (J2000) Qualifiers : From new, raw data NED Comment : From magnitude-aperture curves.
No. 15 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : ESO 157- G 020 Frequency Targeted : RC3 D_0 (blue) Major Axis (2a) : log(2a) + 1 = 1.92 2a = 499.10 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 : 042000.4 -545618. (J2000) Qualifiers : Homogenized from previously published data NED Comment : Extinction and inclination corrected.
No. 16 Published Units: Homogenized Units: Reference Code : 2003AJ....125..525J Published Object Name : NGC 1566 Frequency Targeted : K_s (LGA/2MASS isophotal) Major Axis (2a) : a = 113.3 arcsec 2a = 226.60 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 215.27 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.950 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] : -10.0 deg [J2000] 170 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 : 65.001747 -54.937809 (J2000) Qualifiers : From new, raw data NED Comment :
No. 17 Published Units: Homogenized Units: Reference Code : 2003AJ....125..525J Published Object Name : NGC 1566 Frequency Targeted : K_s (LGA/2MASS "total") Major Axis (2a) : a = 220.1 arcsec 2a = 440.20 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 418.19 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.950 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] : -10.0 deg [J2000] 170 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 : 65.001747 -54.937809 (J2000) Qualifiers : From new, raw data NED Comment :

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