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Date and Time of the Query: 2019-05-26 T07:14:05 PDT
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Diameter data point(s) for object NGC 2836

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
3.50 arcmin 2.50 arcmin ... ... ... ... 118
[B1950]
About 25.5 B-mag arcsec^-2^ 6.81E+14 210.00 ... 0.71 0.29 0.32 44 119
[J2000]
2 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
160.32 arcsec ... ... 1.40 (a/b) ... ... ... 118.00
[B1950]
25.0 B-mag arcsec^-2^ 6.81E+14 160.32 ... 0.71 0.29 0.32 44 119
[J2000]
3 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
190.55 arcsec ... ... 1.40 (a/b) ... ... ... 118.00
[B1950]
26.0 B-mag arcsec^-2^ 6.81E+14 190.55 ... 0.71 0.29 0.32 44 119
[J2000]
4 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
213.80 arcsec ... ... 1.40 (a/b) ... ... ... 118.00
[B1950]
27.0 B-mag arcsec^-2^ 6.81E+14 213.80 ... 0.71 0.29 0.32 44 119
[J2000]
5 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
96.61 arcsec ... ... 1.40 (a/b) ... ... ... 118.00
[B1950]
70% total B light 6.81E+14 96.61 ... 0.71 0.29 0.32 44 119
[J2000]
6 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
116.14 arcsec ... ... 1.40 (a/b) ... ... ... 118.00
[B1950]
80% total B light 6.81E+14 116.14 ... 0.71 0.29 0.32 44 119
[J2000]
7 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
146.22 arcsec ... ... 1.40 (a/b) ... ... ... 118.00
[B1950]
90% total B light 6.81E+14 146.22 ... 0.71 0.29 0.32 44 119
[J2000]
8 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
66.83 arcsec ... ... 1.40 (a/b) ... ... ... 118.00
[B1950]
50% total B light, major dia. 6.81E+14 66.83 ... 0.71 0.29 0.32 44 119
[J2000]
9 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
58.21 arcsec ... ... ... ... ... ... ... 50% total B light, aperture 6.81E+14 58.21 ... ... ... ... ... ...
10 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
27.29 arcsec ... ... ... ... ... ... ... B disk exp. scale length 6.81E+14 27.29 ... ... ... ... ... ...
11 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
22.60 arcsec ... ... 1.98 (a/b) ... ... ... 110.21
[B1950]
B exponential scale length 6.81E+14 22.60 ... 0.51 0.49 0.59 60 111
[J2000]
12 ESO-LV IIIa-F
1989ESOLV.C...0000L
16.06 arcsec ... ... ... ... ... ... ... R exponential scale length 4.68E+14 16.06 ... ... ... ... ... ...
13 RC3 D_25, R_25 (blue)
1991RC3.9.C...0000d
1.42 log(2a) + 1 ... ... 0.14
log(a/b)
0.04 ... ... 118
[J2000]
25.0 B-mag arcsec^-2^ 6.81E+14 157.80 15.20 0.72 0.28 0.31 44 119
[J2000]
14 RC3 D_0 (blue)
1991RC3.9.C...0000d
1.46 log(2a) + 1 ... ... ... ... ... ... ... 25.0 B-mag arcsec^-2^ 6.81E+14 173.00 ... ... ... ... ... ...


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 1982ESOU..C...0000L
Published Object Name         : ESO 061- G 003                
Frequency Targeted            : ESO-Uppsala "Quick Blue" IIa-O
Major Axis (2a)               : 3.50       arcmin                   2a = 210.00 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : 2b =   2.50     arcmin              2b = 150.00 arcsec 
Uncertainty                   : ...                                 ...
Axis Ratio                    : ...                                 b/a = 0.71
Uncertainty                   : ...                                 ...
Ellipticity                   : ...                                 1 - b/a = 0.29
Uncertainty                   : ...                                 ...
Eccentricity                  : ...                                 [(a/b)2-1]/[(a/b)2+1] = 0.32
Uncertainty                   : ...                                 ...
Cos-1(b/a)                    : ...                                 44 deg
Position Angle [Equinox]      : 118    deg [B1950]                  119 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          : 091308.         -690736.    (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 0610030 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 160.32 arcsec 2a = 160.32 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 224.54 arcsec Uncertainty : ... ... Axis Ratio : a/b = 1.40 b/a = 0.71 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.29 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.32 Uncertainty : ... ... Cos-1(b/a) : ... 44 deg Position Angle [Equinox] : 118.00 deg [B1950] 119 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 : 138.283340 -69.126663 (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 0610030 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 190.55 arcsec 2a = 190.55 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 266.88 arcsec Uncertainty : ... ... Axis Ratio : a/b = 1.40 b/a = 0.71 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.29 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.32 Uncertainty : ... ... Cos-1(b/a) : ... 44 deg Position Angle [Equinox] : 118.00 deg [B1950] 119 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 : 138.283340 -69.126663 (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 0610030 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 213.80 arcsec 2a = 213.80 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 299.44 arcsec Uncertainty : ... ... Axis Ratio : a/b = 1.40 b/a = 0.71 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.29 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.32 Uncertainty : ... ... Cos-1(b/a) : ... 44 deg Position Angle [Equinox] : 118.00 deg [B1950] 119 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 : 138.283340 -69.126663 (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 0610030 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 96.61 arcsec 2a = 96.61 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 135.31 arcsec Uncertainty : ... ... Axis Ratio : a/b = 1.40 b/a = 0.71 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.29 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.32 Uncertainty : ... ... Cos-1(b/a) : ... 44 deg Position Angle [Equinox] : 118.00 deg [B1950] 119 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 : 138.283340 -69.126663 (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 0610030 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 116.14 arcsec 2a = 116.14 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 162.66 arcsec Uncertainty : ... ... Axis Ratio : a/b = 1.40 b/a = 0.71 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.29 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.32 Uncertainty : ... ... Cos-1(b/a) : ... 44 deg Position Angle [Equinox] : 118.00 deg [B1950] 119 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 : 138.283340 -69.126663 (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 0610030 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 146.22 arcsec 2a = 146.22 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 204.79 arcsec Uncertainty : ... ... Axis Ratio : a/b = 1.40 b/a = 0.71 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.29 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.32 Uncertainty : ... ... Cos-1(b/a) : ... 44 deg Position Angle [Equinox] : 118.00 deg [B1950] 119 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 : 138.283340 -69.126663 (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 0610030 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 66.83 arcsec 2a = 66.83 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 93.60 arcsec Uncertainty : ... ... Axis Ratio : a/b = 1.40 b/a = 0.71 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.29 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.32 Uncertainty : ... ... Cos-1(b/a) : ... 44 deg Position Angle [Equinox] : 118.00 deg [B1950] 119 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 : 138.283340 -69.126663 (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 0610030 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 58.21 arcsec 2a = 58.21 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 : 138.283340 -69.126663 (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 0610030 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 27.29 arcsec 2a = 27.29 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 : 138.283340 -69.126663 (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 0610030 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 22.60 arcsec 2a = 22.60 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 44.75 arcsec Uncertainty : ... ... Axis Ratio : a/b = 1.98 b/a = 0.51 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.49 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.59 Uncertainty : ... ... Cos-1(b/a) : ... 60 deg Position Angle [Equinox] : 110.21 deg [B1950] 111 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 : 138.283340 -69.126663 (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 0610030 Frequency Targeted : ESO-LV IIIa-F Major Axis (2a) : 16.06 arcsec 2a = 16.06 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 : 138.283340 -69.126663 (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 061- G 003 Frequency Targeted : RC3 D_25, R_25 (blue) Major Axis (2a) : log(2a) + 1 = 1.42 2a = 157.80 arcsec Uncertainty : 0.04 15.20 arcsec Minor Axis (2b) : ... 2b = 114.25 arcsec Uncertainty : ... ... Axis Ratio : log(a/b) = 0.14 b/a = 0.72 Uncertainty : 0.04 0.07 Ellipticity : ... 1 - b/a = 0.28 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.31 Uncertainty : ... ... Cos-1(b/a) : ... 44 deg Position Angle [Equinox] : 118 deg [J2000] 119 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 : 091344.7 -692005. (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 061- G 003 Frequency Targeted : RC3 D_0 (blue) Major Axis (2a) : log(2a) + 1 = 1.46 2a = 173.00 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 : 091344.7 -692005. (J2000) Qualifiers : Homogenized from previously published data NED Comment : Extinction and inclination corrected.

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