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Date and Time of the Query: 2019-06-24 T16:47:56 PDT
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Diameter data point(s) for object IC 4951

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 0.80 arcmin ... ... ... ... 176
[B1950]
About 25.5 B-mag arcsec^-2^ 6.81E+14 210.00 ... 0.23 0.77 0.90 77 176
[J2000]
2 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
164.06 arcsec ... ... 4.38 (a/b) ... ... ... 176.00
[B1950]
25.0 B-mag arcsec^-2^ 6.81E+14 164.06 ... 0.23 0.77 0.90 77 176
[J2000]
3 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
204.17 arcsec ... ... 4.38 (a/b) ... ... ... 176.00
[B1950]
26.0 B-mag arcsec^-2^ 6.81E+14 204.17 ... 0.23 0.77 0.90 77 176
[J2000]
4 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
239.88 arcsec ... ... 4.38 (a/b) ... ... ... 176.00
[B1950]
27.0 B-mag arcsec^-2^ 6.81E+14 239.88 ... 0.23 0.77 0.90 77 176
[J2000]
5 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
110.92 arcsec ... ... 4.38 (a/b) ... ... ... 176.00
[B1950]
70% total B light 6.81E+14 110.92 ... 0.23 0.77 0.90 77 176
[J2000]
6 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
134.90 arcsec ... ... 4.38 (a/b) ... ... ... 176.00
[B1950]
80% total B light 6.81E+14 134.90 ... 0.23 0.77 0.90 77 176
[J2000]
7 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
169.82 arcsec ... ... 4.38 (a/b) ... ... ... 176.00
[B1950]
90% total B light 6.81E+14 169.82 ... 0.23 0.77 0.90 77 176
[J2000]
8 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
74.13 arcsec ... ... 4.38 (a/b) ... ... ... 176.00
[B1950]
50% total B light, major dia. 6.81E+14 74.13 ... 0.23 0.77 0.90 77 176
[J2000]
9 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
50.12 arcsec ... ... ... ... ... ... ... 50% total B light, aperture 6.81E+14 50.12 ... ... ... ... ... ...
10 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
14.01 arcsec ... ... ... ... ... ... ... B disk exp. scale length 6.81E+14 14.01 ... ... ... ... ... ...
11 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
9.00 arcsec ... ... 8.35 (a/b) ... ... ... 172.70
[B1950]
B exponential scale length 6.81E+14 9.00 ... 0.12 0.88 0.97 83 172
[J2000]
12 ESO-LV IIIa-F
1989ESOLV.C...0000L
16.92 arcsec ... ... ... ... ... ... ... R exponential scale length 4.68E+14 16.92 ... ... ... ... ... ...
13 RC3 D_25, R_25 (blue)
1991RC3.9.C...0000d
1.44 log(2a) + 1 ... ... 0.75
log(a/b)
0.04 ... ... 176
[J2000]
25.0 B-mag arcsec^-2^ 6.81E+14 165.30 15.90 0.18 0.82 0.94 80 176
[J2000]
14 RC3 D_0 (blue)
1991RC3.9.C...0000d
1.45 log(2a) + 1 ... ... ... ... ... ... ... 25.0 B-mag arcsec^-2^ 6.81E+14 169.10 ... ... ... ... ... ...


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 1982ESOU..C...0000L
Published Object Name         : ESO 143- G 010                
Frequency Targeted            : ESO-Uppsala "Quick Blue" IIa-O
Major Axis (2a)               : 3.50       arcmin                   2a = 210.00 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : 2b =   0.80     arcmin              2b = 48.00 arcsec 
Uncertainty                   : ...                                 ...
Axis Ratio                    : ...                                 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)                    : ...                                 77 deg
Position Angle [Equinox]      : 176    deg [B1950]                  176 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          : 200511.         -615936.    (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 1430100 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 164.06 arcsec 2a = 164.06 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 716.42 arcsec Uncertainty : ... ... Axis Ratio : a/b = 4.38 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) : ... 77 deg Position Angle [Equinox] : 176.00 deg [B1950] 176 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 : 301.295837 -61.993332 (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 1430100 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 204.17 arcsec 2a = 204.17 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 891.57 arcsec Uncertainty : ... ... Axis Ratio : a/b = 4.38 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) : ... 77 deg Position Angle [Equinox] : 176.00 deg [B1950] 176 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 : 301.295837 -61.993332 (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 1430100 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 239.88 arcsec 2a = 239.88 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 1047.51 arcsec Uncertainty : ... ... Axis Ratio : a/b = 4.38 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) : ... 77 deg Position Angle [Equinox] : 176.00 deg [B1950] 176 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 : 301.295837 -61.993332 (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 1430100 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 110.92 arcsec 2a = 110.92 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 484.37 arcsec Uncertainty : ... ... Axis Ratio : a/b = 4.38 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) : ... 77 deg Position Angle [Equinox] : 176.00 deg [B1950] 176 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 : 301.295837 -61.993332 (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 1430100 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 134.90 arcsec 2a = 134.90 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 589.08 arcsec Uncertainty : ... ... Axis Ratio : a/b = 4.38 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) : ... 77 deg Position Angle [Equinox] : 176.00 deg [B1950] 176 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 : 301.295837 -61.993332 (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 1430100 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 169.82 arcsec 2a = 169.82 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 741.57 arcsec Uncertainty : ... ... Axis Ratio : a/b = 4.38 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) : ... 77 deg Position Angle [Equinox] : 176.00 deg [B1950] 176 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 : 301.295837 -61.993332 (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 1430100 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 74.13 arcsec 2a = 74.13 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 323.71 arcsec Uncertainty : ... ... Axis Ratio : a/b = 4.38 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) : ... 77 deg Position Angle [Equinox] : 176.00 deg [B1950] 176 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 : 301.295837 -61.993332 (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 1430100 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 50.12 arcsec 2a = 50.12 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 : 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 : 301.295837 -61.993332 (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 1430100 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 14.01 arcsec 2a = 14.01 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 : 301.295837 -61.993332 (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 1430100 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 9.00 arcsec 2a = 9.00 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 75.00 arcsec Uncertainty : ... ... Axis Ratio : a/b = 8.35 b/a = 0.12 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.88 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.97 Uncertainty : ... ... Cos-1(b/a) : ... 83 deg Position Angle [Equinox] : 172.70 deg [B1950] 172 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 : 301.295837 -61.993332 (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 1430100 Frequency Targeted : ESO-LV IIIa-F Major Axis (2a) : 16.92 arcsec 2a = 16.92 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 : 301.295837 -61.993332 (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 143- G 010 Frequency Targeted : RC3 D_25, R_25 (blue) Major Axis (2a) : log(2a) + 1 = 1.44 2a = 165.30 arcsec Uncertainty : 0.04 15.90 arcsec Minor Axis (2b) : ... 2b = 29.42 arcsec Uncertainty : ... ... Axis Ratio : log(a/b) = 0.75 b/a = 0.18 Uncertainty : 0.05 0.02 Ellipticity : ... 1 - b/a = 0.82 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.94 Uncertainty : ... ... Cos-1(b/a) : ... 80 deg Position Angle [Equinox] : 176 deg [J2000] 176 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 : 200931.2 -615047. (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 143- G 010 Frequency Targeted : RC3 D_0 (blue) Major Axis (2a) : log(2a) + 1 = 1.45 2a = 169.10 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 : 200931.2 -615047. (J2000) Qualifiers : Homogenized from previously published data NED Comment : Extinction and inclination corrected.

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