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Date and Time of the Query: 2018-10-18 T12:48:31 PDT
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Diameter data point(s) for object IC 4970

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
0.60 arcmin 0.20 arcmin ... ... ... ... 6
[B1950]
About 25.5 B-mag arcsec^-2^ 6.81E+14 36.00 ... 0.33 0.67 0.80 71 5
[J2000]
2 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
128.82 arcsec ... ... 3.00 (a/b) ... ... ... 17.36
[B1950]
25.0 B-mag arcsec^-2^ 6.81E+14 128.82 ... 0.33 0.67 0.80 71 17
[J2000]
3 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
64.57 arcsec ... ... 3.00 (a/b) ... ... ... 17.36
[B1950]
70% total B light 6.81E+14 64.57 ... 0.33 0.67 0.80 71 17
[J2000]
4 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
94.41 arcsec ... ... 3.00 (a/b) ... ... ... 17.36
[B1950]
80% total B light 6.81E+14 94.41 ... 0.33 0.67 0.80 71 17
[J2000]
5 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
127.35 arcsec ... ... 3.00 (a/b) ... ... ... 17.36
[B1950]
90% total B light 6.81E+14 127.35 ... 0.33 0.67 0.80 71 17
[J2000]
6 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
29.51 arcsec ... ... 3.00 (a/b) ... ... ... 17.36
[B1950]
50% total B light, major dia. 6.81E+14 29.51 ... 0.33 0.67 0.80 71 17
[J2000]
7 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
22.39 arcsec ... ... ... ... ... ... ... 50% total B light, aperture 6.81E+14 22.39 ... ... ... ... ... ...
8 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
5.82 arcsec ... ... ... ... ... ... ... B disk exp. scale length 6.81E+14 5.82 ... ... ... ... ... ...
9 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
0.07 arcsec ... ... 3.00 (a/b) ... ... ... 17.36
[B1950]
B exponential scale length 6.81E+14 0.07 ... 0.33 0.67 0.80 71 17
[J2000]
10 ESO-LV IIIa-F
1989ESOLV.C...0000L
0.02 arcsec ... ... ... ... ... ... ... R exponential scale length 4.68E+14 0.02 ... ... ... ... ... ...
11 RC3 D_25, R_25 (blue)
1991RC3.9.C...0000d
0.83 log(2a) + 1 ... ... 0.49
log(a/b)
0.07 ... ... 6
[J2000]
25.0 B-mag arcsec^-2^ 6.81E+14 40.60 7.10 0.32 0.68 0.81 71 5
[J2000]
12 RC3 D_0 (blue)
1991RC3.9.C...0000d
0.78 log(2a) + 1 ... ... ... ... ... ... ... 25.0 B-mag arcsec^-2^ 6.81E+14 36.20 ... ... ... ... ... ...


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 1982ESOU..C...0000L
Published Object Name         : ESO 073-IG 033                
Frequency Targeted            : ESO-Uppsala "Quick Blue" IIa-O
Major Axis (2a)               : 0.60       arcmin                   2a = 36.00 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : 2b =   0.20     arcmin              2b = 12.00 arcsec 
Uncertainty                   : ...                                 ...
Axis Ratio                    : ...                                 b/a = 0.33
Uncertainty                   : ...                                 ...
Ellipticity                   : ...                                 1 - b/a = 0.67
Uncertainty                   : ...                                 ...
Eccentricity                  : ...                                 [(a/b)2-1]/[(a/b)2+1] = 0.80
Uncertainty                   : ...                                 ...
Cos-1(b/a)                    : ...                                 71 deg
Position Angle [Equinox]      :   6    deg [B1950]                  5 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          : 201144.         -705412.    (B1950)
Qualifiers                    : From new, raw data
NED Comment                   :                                         

No. 2 Published Units: Homogenized Units: Reference Code : 1989ESOLV.C...0000L Published Object Name : ESO-LV 0730330 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 128.82 arcsec 2a = 128.82 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 386.85 arcsec Uncertainty : ... ... Axis Ratio : a/b = 3.00 b/a = 0.33 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.67 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.80 Uncertainty : ... ... Cos-1(b/a) : ... 71 deg Position Angle [Equinox] : 17.36 deg [B1950] 17 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 : 302.933319 -70.903336 (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 0730330 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 64.57 arcsec 2a = 64.57 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 193.90 arcsec Uncertainty : ... ... Axis Ratio : a/b = 3.00 b/a = 0.33 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.67 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.80 Uncertainty : ... ... Cos-1(b/a) : ... 71 deg Position Angle [Equinox] : 17.36 deg [B1950] 17 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 : 302.933319 -70.903336 (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 0730330 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 94.41 arcsec 2a = 94.41 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 283.51 arcsec Uncertainty : ... ... Axis Ratio : a/b = 3.00 b/a = 0.33 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.67 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.80 Uncertainty : ... ... Cos-1(b/a) : ... 71 deg Position Angle [Equinox] : 17.36 deg [B1950] 17 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 : 302.933319 -70.903336 (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 0730330 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 127.35 arcsec 2a = 127.35 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 382.43 arcsec Uncertainty : ... ... Axis Ratio : a/b = 3.00 b/a = 0.33 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.67 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.80 Uncertainty : ... ... Cos-1(b/a) : ... 71 deg Position Angle [Equinox] : 17.36 deg [B1950] 17 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 : 302.933319 -70.903336 (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 0730330 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 29.51 arcsec 2a = 29.51 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 88.62 arcsec Uncertainty : ... ... Axis Ratio : a/b = 3.00 b/a = 0.33 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.67 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.80 Uncertainty : ... ... Cos-1(b/a) : ... 71 deg Position Angle [Equinox] : 17.36 deg [B1950] 17 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 : 302.933319 -70.903336 (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 0730330 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 22.39 arcsec 2a = 22.39 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 : 302.933319 -70.903336 (B1950) Qualifiers : From new, raw data; Corrected for contaminating sources NED Comment : Circular aperture
No. 8 Published Units: Homogenized Units: Reference Code : 1989ESOLV.C...0000L Published Object Name : ESO-LV 0730330 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 5.82 arcsec 2a = 5.82 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 : 302.933319 -70.903336 (B1950) Qualifiers : From new, raw data; Corrected for contaminating sources NED Comment : From fits to surf. brightness in octants
No. 9 Published Units: Homogenized Units: Reference Code : 1989ESOLV.C...0000L Published Object Name : ESO-LV 0730330 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 0.07 arcsec 2a = 0.07 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 0.21 arcsec Uncertainty : ... ... Axis Ratio : a/b = 3.00 b/a = 0.33 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.67 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.80 Uncertainty : ... ... Cos-1(b/a) : ... 71 deg Position Angle [Equinox] : 17.36 deg [B1950] 17 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 : 302.933319 -70.903336 (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 0730330 Frequency Targeted : ESO-LV IIIa-F Major Axis (2a) : 0.02 arcsec 2a = 0.02 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 : 302.933319 -70.903336 (B1950) Qualifiers : From new, raw data; Corrected for contaminating sources NED Comment : Derived scale length < 2" mean ESO-B PSF
No. 11 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : ESO 073-IG 033 Frequency Targeted : RC3 D_25, R_25 (blue) Major Axis (2a) : log(2a) + 1 = 0.83 2a = 40.60 arcsec Uncertainty : 0.07 7.10 arcsec Minor Axis (2b) : ... 2b = 13.15 arcsec Uncertainty : ... ... Axis Ratio : log(a/b) = 0.49 b/a = 0.32 Uncertainty : 0.03 0.02 Ellipticity : ... 1 - b/a = 0.68 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.81 Uncertainty : ... ... Cos-1(b/a) : ... 71 deg Position Angle [Equinox] : 6 deg [J2000] 5 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 : 201657.9 -704457. (J2000) Qualifiers : Homogenized from previously published data NED Comment :
No. 12 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : ESO 073-IG 033 Frequency Targeted : RC3 D_0 (blue) Major Axis (2a) : log(2a) + 1 = 0.78 2a = 36.20 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 : 201657.9 -704457. (J2000) Qualifiers : Homogenized from previously published data NED Comment : Extinction and inclination corrected.

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