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Date and Time of the Query: 2019-06-20 T14:27:24 PDT
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Diameter data point(s) for object IC 4795

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
1.00 arcmin 0.20 arcmin ... ... ... ... 70
[B1950]
About 25.5 B-mag arcsec^-2^ 6.81E+14 60.00 ... 0.20 0.80 0.92 78 69
[J2000]
2 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
69.18 arcsec ... ... 5.00 (a/b) ... ... ... 70.00
[B1950]
25.0 B-mag arcsec^-2^ 6.81E+14 69.18 ... 0.20 0.80 0.92 78 69
[J2000]
3 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
80.35 arcsec ... ... 5.00 (a/b) ... ... ... 70.00
[B1950]
26.0 B-mag arcsec^-2^ 6.81E+14 80.35 ... 0.20 0.80 0.92 78 69
[J2000]
4 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
89.13 arcsec ... ... 5.00 (a/b) ... ... ... 70.00
[B1950]
27.0 B-mag arcsec^-2^ 6.81E+14 89.13 ... 0.20 0.80 0.92 78 69
[J2000]
5 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
44.16 arcsec ... ... 5.00 (a/b) ... ... ... 70.00
[B1950]
70% total B light 6.81E+14 44.16 ... 0.20 0.80 0.92 78 69
[J2000]
6 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
51.29 arcsec ... ... 5.00 (a/b) ... ... ... 70.00
[B1950]
80% total B light 6.81E+14 51.29 ... 0.20 0.80 0.92 78 69
[J2000]
7 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
61.66 arcsec ... ... 5.00 (a/b) ... ... ... 70.00
[B1950]
90% total B light 6.81E+14 61.66 ... 0.20 0.80 0.92 78 69
[J2000]
8 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
34.28 arcsec ... ... 5.00 (a/b) ... ... ... 70.00
[B1950]
50% total B light, major dia. 6.81E+14 34.28 ... 0.20 0.80 0.92 78 69
[J2000]
9 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
20.89 arcsec ... ... ... ... ... ... ... 50% total B light, aperture 6.81E+14 20.89 ... ... ... ... ... ...
10 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
11.90 arcsec ... ... ... ... ... ... ... B disk exp. scale length 6.81E+14 11.90 ... ... ... ... ... ...
11 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
21.06 arcsec ... ... 4.28 (a/b) ... ... ... 68.66
[B1950]
B exponential scale length 6.81E+14 21.06 ... 0.23 0.77 0.90 76 68
[J2000]
12 ESO-LV IIIa-F
1989ESOLV.C...0000L
11.22 arcsec ... ... ... ... ... ... ... R exponential scale length 4.68E+14 11.22 ... ... ... ... ... ...


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 1982ESOU..C...0000L
Published Object Name         : ESO 141- G 014                
Frequency Targeted            : ESO-Uppsala "Quick Blue" IIa-O
Major Axis (2a)               : 1.00       arcmin                   2a = 60.00 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : 2b =   0.20     arcmin              2b = 12.00 arcsec 
Uncertainty                   : ...                                 ...
Axis Ratio                    : ...                                 b/a = 0.20
Uncertainty                   : ...                                 ...
Ellipticity                   : ...                                 1 - b/a = 0.80
Uncertainty                   : ...                                 ...
Eccentricity                  : ...                                 [(a/b)2-1]/[(a/b)2+1] = 0.92
Uncertainty                   : ...                                 ...
Cos-1(b/a)                    : ...                                 78 deg
Position Angle [Equinox]      :  70    deg [B1950]                  69 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          : 185242.         -614036.    (B1950)
Qualifiers                    : From new, raw data
NED Comment                   :                                         

No. 2 Published Units: Homogenized Units: Reference Code : 1989ESOLV.C...0000L Published Object Name : ESO-LV 1410140 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 69.18 arcsec 2a = 69.18 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 345.90 arcsec Uncertainty : ... ... Axis Ratio : a/b = 5.00 b/a = 0.20 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.80 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.92 Uncertainty : ... ... Cos-1(b/a) : ... 78 deg Position Angle [Equinox] : 70.00 deg [B1950] 69 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 : 283.174988 -61.676666 (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 1410140 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 80.35 arcsec 2a = 80.35 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 401.75 arcsec Uncertainty : ... ... Axis Ratio : a/b = 5.00 b/a = 0.20 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.80 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.92 Uncertainty : ... ... Cos-1(b/a) : ... 78 deg Position Angle [Equinox] : 70.00 deg [B1950] 69 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 : 283.174988 -61.676666 (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 1410140 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 89.13 arcsec 2a = 89.13 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 445.65 arcsec Uncertainty : ... ... Axis Ratio : a/b = 5.00 b/a = 0.20 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.80 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.92 Uncertainty : ... ... Cos-1(b/a) : ... 78 deg Position Angle [Equinox] : 70.00 deg [B1950] 69 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 : 283.174988 -61.676666 (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 1410140 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 44.16 arcsec 2a = 44.16 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 220.80 arcsec Uncertainty : ... ... Axis Ratio : a/b = 5.00 b/a = 0.20 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.80 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.92 Uncertainty : ... ... Cos-1(b/a) : ... 78 deg Position Angle [Equinox] : 70.00 deg [B1950] 69 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 : 283.174988 -61.676666 (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 1410140 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 51.29 arcsec 2a = 51.29 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 256.45 arcsec Uncertainty : ... ... Axis Ratio : a/b = 5.00 b/a = 0.20 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.80 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.92 Uncertainty : ... ... Cos-1(b/a) : ... 78 deg Position Angle [Equinox] : 70.00 deg [B1950] 69 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 : 283.174988 -61.676666 (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 1410140 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 61.66 arcsec 2a = 61.66 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 308.30 arcsec Uncertainty : ... ... Axis Ratio : a/b = 5.00 b/a = 0.20 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.80 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.92 Uncertainty : ... ... Cos-1(b/a) : ... 78 deg Position Angle [Equinox] : 70.00 deg [B1950] 69 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 : 283.174988 -61.676666 (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 1410140 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 34.28 arcsec 2a = 34.28 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 171.40 arcsec Uncertainty : ... ... Axis Ratio : a/b = 5.00 b/a = 0.20 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.80 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.92 Uncertainty : ... ... Cos-1(b/a) : ... 78 deg Position Angle [Equinox] : 70.00 deg [B1950] 69 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 : 283.174988 -61.676666 (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 1410140 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 20.89 arcsec 2a = 20.89 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 : 283.174988 -61.676666 (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 1410140 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 11.90 arcsec 2a = 11.90 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 : 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 : 283.174988 -61.676666 (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 1410140 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 21.06 arcsec 2a = 21.06 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 90.00 arcsec Uncertainty : ... ... Axis Ratio : a/b = 4.28 b/a = 0.23 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.77 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.90 Uncertainty : ... ... Cos-1(b/a) : ... 76 deg Position Angle [Equinox] : 68.66 deg [B1950] 68 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 : 283.174988 -61.676666 (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 1410140 Frequency Targeted : ESO-LV IIIa-F Major Axis (2a) : 11.22 arcsec 2a = 11.22 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 : 283.174988 -61.676666 (B1950) Qualifiers : From new, raw data; Corrected for contaminating sources NED Comment : From fits to surf. brightness in octants

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