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Date and Time of the Query: 2019-06-16 T17:03:13 PDT
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Diameter data point(s) for object IC 2071

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 0.50 arcmin ... ... ... ... 85
[B1950]
About 25.5 B-mag arcsec^-2^ 6.81E+14 60.00 ... 0.50 0.50 0.60 60 85
[J2000]
2 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
17.38 arcsec ... ... 1.20 (a/b) ... ... ... 87.58
[B1950]
25.0 B-mag arcsec^-2^ 6.81E+14 17.38 ... 0.83 0.17 0.18 34 88
[J2000]
3 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
22.65 arcsec ... ... 1.20 (a/b) ... ... ... 87.58
[B1950]
26.0 B-mag arcsec^-2^ 6.81E+14 22.65 ... 0.83 0.17 0.18 34 88
[J2000]
4 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
27.86 arcsec ... ... 1.20 (a/b) ... ... ... 87.58
[B1950]
27.0 B-mag arcsec^-2^ 6.81E+14 27.86 ... 0.83 0.17 0.18 34 88
[J2000]
5 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
10.96 arcsec ... ... 1.20 (a/b) ... ... ... 87.58
[B1950]
70% total B light 6.81E+14 10.96 ... 0.83 0.17 0.18 34 88
[J2000]
6 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
13.80 arcsec ... ... 1.20 (a/b) ... ... ... 87.58
[B1950]
80% total B light 6.81E+14 13.80 ... 0.83 0.17 0.18 34 88
[J2000]
7 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
19.05 arcsec ... ... 1.20 (a/b) ... ... ... 87.58
[B1950]
90% total B light 6.81E+14 19.05 ... 0.83 0.17 0.18 34 88
[J2000]
8 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
65.31 arcsec ... ... ... ... ... ... ... 50% total B light, aperture 6.81E+14 65.31 ... ... ... ... ... ...
9 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
1.12 arcsec ... ... 1.20 (a/b) ... ... ... 87.58
[B1950]
B exponential scale length 6.81E+14 1.12 ... 0.83 0.17 0.18 34 88
[J2000]
10 ESO-LV IIIa-F
1989ESOLV.C...0000L
5.89 arcsec ... ... ... ... ... ... ... R exponential scale length 4.68E+14 5.89 ... ... ... ... ... ...


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 1982ESOU..C...0000L
Published Object Name         : ESO 157-IG 028                
Frequency Targeted            : ESO-Uppsala "Quick Blue" IIa-O
Major Axis (2a)               : 1.00       arcmin                   2a = 60.00 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : 2b =   0.50     arcmin              2b = 30.00 arcsec 
Uncertainty                   : ...                                 ...
Axis Ratio                    : ...                                 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]      :  85    deg [B1950]                  85 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          : 042502.         -531542.    (B1950)
Qualifiers                    : From new, raw data
NED Comment                   :                                         

No. 2 Published Units: Homogenized Units: Reference Code : 1989ESOLV.C...0000L Published Object Name : ESO-LV 1570280 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 17.38 arcsec 2a = 17.38 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 20.86 arcsec Uncertainty : ... ... Axis Ratio : a/b = 1.20 b/a = 0.83 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.17 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.18 Uncertainty : ... ... Cos-1(b/a) : ... 34 deg Position Angle [Equinox] : 87.58 deg [B1950] 88 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 : 66.258331 -53.261665 (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 1570280 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 22.65 arcsec 2a = 22.65 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 27.19 arcsec Uncertainty : ... ... Axis Ratio : a/b = 1.20 b/a = 0.83 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.17 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.18 Uncertainty : ... ... Cos-1(b/a) : ... 34 deg Position Angle [Equinox] : 87.58 deg [B1950] 88 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 : 66.258331 -53.261665 (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 1570280 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 27.86 arcsec 2a = 27.86 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 33.45 arcsec Uncertainty : ... ... Axis Ratio : a/b = 1.20 b/a = 0.83 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.17 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.18 Uncertainty : ... ... Cos-1(b/a) : ... 34 deg Position Angle [Equinox] : 87.58 deg [B1950] 88 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 : 66.258331 -53.261665 (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 1570280 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 10.96 arcsec 2a = 10.96 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 13.16 arcsec Uncertainty : ... ... Axis Ratio : a/b = 1.20 b/a = 0.83 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.17 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.18 Uncertainty : ... ... Cos-1(b/a) : ... 34 deg Position Angle [Equinox] : 87.58 deg [B1950] 88 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 : 66.258331 -53.261665 (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 1570280 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 13.80 arcsec 2a = 13.80 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 16.57 arcsec Uncertainty : ... ... Axis Ratio : a/b = 1.20 b/a = 0.83 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.17 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.18 Uncertainty : ... ... Cos-1(b/a) : ... 34 deg Position Angle [Equinox] : 87.58 deg [B1950] 88 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 : 66.258331 -53.261665 (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 1570280 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 19.05 arcsec 2a = 19.05 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 22.87 arcsec Uncertainty : ... ... Axis Ratio : a/b = 1.20 b/a = 0.83 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.17 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.18 Uncertainty : ... ... Cos-1(b/a) : ... 34 deg Position Angle [Equinox] : 87.58 deg [B1950] 88 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 : 66.258331 -53.261665 (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 1570280 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 65.31 arcsec 2a = 65.31 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 : 66.258331 -53.261665 (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 1570280 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 1.12 arcsec 2a = 1.12 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 1.34 arcsec Uncertainty : ... ... Axis Ratio : a/b = 1.20 b/a = 0.83 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.17 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.18 Uncertainty : ... ... Cos-1(b/a) : ... 34 deg Position Angle [Equinox] : 87.58 deg [B1950] 88 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 : 66.258331 -53.261665 (B1950) Qualifiers : From new, raw data; Corrected for contaminating sources NED Comment : Derived scale length < 2" mean ESO-B PSF
No. 10 Published Units: Homogenized Units: Reference Code : 1989ESOLV.C...0000L Published Object Name : ESO-LV 1570280 Frequency Targeted : ESO-LV IIIa-F Major Axis (2a) : 5.89 arcsec 2a = 5.89 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 : 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 : 66.258331 -53.261665 (B1950) Qualifiers : From new, raw data; Corrected for contaminating sources NED Comment : From fits to surf. brightness in octants

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