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Date and Time of the Query: 2019-07-23 T11:38:44 PDT
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Diameter data point(s) for object IC 4792

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
0.90 arcmin 0.20 arcmin ... ... ... ... 157
[B1950]
About 25.5 B-mag arcsec^-2^ 6.81E+14 54.00 ... 0.22 0.78 0.91 77 157
[J2000]
2 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
81.28 arcsec ... ... 4.50 (a/b) ... ... ... 157.00
[B1950]
25.0 B-mag arcsec^-2^ 6.81E+14 81.28 ... 0.22 0.78 0.91 77 157
[J2000]
3 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
103.51 arcsec ... ... 4.50 (a/b) ... ... ... 157.00
[B1950]
26.0 B-mag arcsec^-2^ 6.81E+14 103.51 ... 0.22 0.78 0.91 77 157
[J2000]
4 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
125.89 arcsec ... ... 4.50 (a/b) ... ... ... 157.00
[B1950]
27.0 B-mag arcsec^-2^ 6.81E+14 125.89 ... 0.22 0.78 0.91 77 157
[J2000]
5 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
44.67 arcsec ... ... 4.50 (a/b) ... ... ... 157.00
[B1950]
70% total B light 6.81E+14 44.67 ... 0.22 0.78 0.91 77 157
[J2000]
6 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
56.89 arcsec ... ... 4.50 (a/b) ... ... ... 157.00
[B1950]
80% total B light 6.81E+14 56.89 ... 0.22 0.78 0.91 77 157
[J2000]
7 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
77.62 arcsec ... ... 4.50 (a/b) ... ... ... 157.00
[B1950]
90% total B light 6.81E+14 77.62 ... 0.22 0.78 0.91 77 157
[J2000]
8 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
29.17 arcsec ... ... 4.50 (a/b) ... ... ... 157.00
[B1950]
50% total B light, major dia. 6.81E+14 29.17 ... 0.22 0.78 0.91 77 157
[J2000]
9 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
15.14 arcsec ... ... ... ... ... ... ... 50% total B light, aperture 6.81E+14 15.14 ... ... ... ... ... ...
10 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
8.79 arcsec ... ... ... ... ... ... ... B disk exp. scale length 6.81E+14 8.79 ... ... ... ... ... ...
11 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
0.48 arcsec ... ... 3.06 (a/b) ... ... ... 153.72
[B1950]
B exponential scale length 6.81E+14 0.48 ... 0.33 0.67 0.81 71 153
[J2000]
12 ESO-LV IIIa-F
1989ESOLV.C...0000L
0.12 arcsec ... ... ... ... ... ... ... R exponential scale length 4.68E+14 0.12 ... ... ... ... ... ...


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 1982ESOU..C...0000L
Published Object Name         : ESO 183- G 026                
Frequency Targeted            : ESO-Uppsala "Quick Blue" IIa-O
Major Axis (2a)               : 0.90       arcmin                   2a = 54.00 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : 2b =   0.20     arcmin              2b = 12.00 arcsec 
Uncertainty                   : ...                                 ...
Axis Ratio                    : ...                                 b/a = 0.22
Uncertainty                   : ...                                 ...
Ellipticity                   : ...                                 1 - b/a = 0.78
Uncertainty                   : ...                                 ...
Eccentricity                  : ...                                 [(a/b)2-1]/[(a/b)2+1] = 0.91
Uncertainty                   : ...                                 ...
Cos-1(b/a)                    : ...                                 77 deg
Position Angle [Equinox]      : 157    deg [B1950]                  157 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          : 185130.         -562806.    (B1950)
Qualifiers                    : From new, raw data
NED Comment                   :                                         

No. 2 Published Units: Homogenized Units: Reference Code : 1989ESOLV.C...0000L Published Object Name : ESO-LV 1830260 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 81.28 arcsec 2a = 81.28 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 366.13 arcsec Uncertainty : ... ... Axis Ratio : a/b = 4.50 b/a = 0.22 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.78 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.91 Uncertainty : ... ... Cos-1(b/a) : ... 77 deg Position Angle [Equinox] : 157.00 deg [B1950] 157 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 : 282.875000 -56.468334 (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 1830260 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 103.51 arcsec 2a = 103.51 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 466.26 arcsec Uncertainty : ... ... Axis Ratio : a/b = 4.50 b/a = 0.22 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.78 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.91 Uncertainty : ... ... Cos-1(b/a) : ... 77 deg Position Angle [Equinox] : 157.00 deg [B1950] 157 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 : 282.875000 -56.468334 (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 1830260 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 125.89 arcsec 2a = 125.89 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 567.07 arcsec Uncertainty : ... ... Axis Ratio : a/b = 4.50 b/a = 0.22 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.78 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.91 Uncertainty : ... ... Cos-1(b/a) : ... 77 deg Position Angle [Equinox] : 157.00 deg [B1950] 157 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 : 282.875000 -56.468334 (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 1830260 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 44.67 arcsec 2a = 44.67 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 201.22 arcsec Uncertainty : ... ... Axis Ratio : a/b = 4.50 b/a = 0.22 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.78 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.91 Uncertainty : ... ... Cos-1(b/a) : ... 77 deg Position Angle [Equinox] : 157.00 deg [B1950] 157 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 : 282.875000 -56.468334 (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 1830260 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 56.89 arcsec 2a = 56.89 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 256.26 arcsec Uncertainty : ... ... Axis Ratio : a/b = 4.50 b/a = 0.22 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.78 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.91 Uncertainty : ... ... Cos-1(b/a) : ... 77 deg Position Angle [Equinox] : 157.00 deg [B1950] 157 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 : 282.875000 -56.468334 (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 1830260 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 77.62 arcsec 2a = 77.62 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 349.64 arcsec Uncertainty : ... ... Axis Ratio : a/b = 4.50 b/a = 0.22 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.78 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.91 Uncertainty : ... ... Cos-1(b/a) : ... 77 deg Position Angle [Equinox] : 157.00 deg [B1950] 157 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 : 282.875000 -56.468334 (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 1830260 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 29.17 arcsec 2a = 29.17 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 131.40 arcsec Uncertainty : ... ... Axis Ratio : a/b = 4.50 b/a = 0.22 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.78 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.91 Uncertainty : ... ... Cos-1(b/a) : ... 77 deg Position Angle [Equinox] : 157.00 deg [B1950] 157 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 : 282.875000 -56.468334 (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 1830260 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 15.14 arcsec 2a = 15.14 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 : 282.875000 -56.468334 (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 1830260 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 8.79 arcsec 2a = 8.79 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 : 282.875000 -56.468334 (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 1830260 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 0.48 arcsec 2a = 0.48 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 1.47 arcsec Uncertainty : ... ... Axis Ratio : a/b = 3.06 b/a = 0.33 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.67 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.81 Uncertainty : ... ... Cos-1(b/a) : ... 71 deg Position Angle [Equinox] : 153.72 deg [B1950] 153 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 : 282.875000 -56.468334 (B1950) Qualifiers : From new, raw data; Corrected for contaminating sources NED Comment : Derived scale length < 2" mean ESO-B PSF
No. 12 Published Units: Homogenized Units: Reference Code : 1989ESOLV.C...0000L Published Object Name : ESO-LV 1830260 Frequency Targeted : ESO-LV IIIa-F Major Axis (2a) : 0.12 arcsec 2a = 0.12 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 : 282.875000 -56.468334 (B1950) Qualifiers : From new, raw data; Corrected for contaminating sources NED Comment : Derived scale length < 2" mean ESO-B PSF

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