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Date and Time of the Query: 2019-06-18 T15:18:22 PDT
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Diameter data point(s) for object IC 4379

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 POSS1 103a-E
1974MCG5..C...0000V
1.0 arcmin 0.2 arcmin ... ... ... ... ... Intermed. surface brightness 7.40E+14 60.00 ... 0.20 0.80 0.92 78 ...
2 ESO-Uppsala "Quick Blue" IIa-O
1982ESOU..C...0000L
1.00 arcmin 0.20 arcmin ... ... ... ... 90
[B1950]
About 25.5 B-mag arcsec^-2^ 6.81E+14 60.00 ... 0.20 0.80 0.92 78 90
[J2000]
3 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
76.74 arcsec ... ... 5.00 (a/b) ... ... ... 90.00
[B1950]
25.0 B-mag arcsec^-2^ 6.81E+14 76.74 ... 0.20 0.80 0.92 78 90
[J2000]
4 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
93.33 arcsec ... ... 5.00 (a/b) ... ... ... 90.00
[B1950]
26.0 B-mag arcsec^-2^ 6.81E+14 93.33 ... 0.20 0.80 0.92 78 90
[J2000]
5 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
50.12 arcsec ... ... 5.00 (a/b) ... ... ... 90.00
[B1950]
70% total B light 6.81E+14 50.12 ... 0.20 0.80 0.92 78 90
[J2000]
6 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
58.88 arcsec ... ... 5.00 (a/b) ... ... ... 90.00
[B1950]
80% total B light 6.81E+14 58.88 ... 0.20 0.80 0.92 78 90
[J2000]
7 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
73.28 arcsec ... ... 5.00 (a/b) ... ... ... 90.00
[B1950]
90% total B light 6.81E+14 73.28 ... 0.20 0.80 0.92 78 90
[J2000]
8 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
38.02 arcsec ... ... 5.00 (a/b) ... ... ... 90.00
[B1950]
50% total B light, major dia. 6.81E+14 38.02 ... 0.20 0.80 0.92 78 90
[J2000]
9 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
17.38 arcsec ... ... ... ... ... ... ... 50% total B light, aperture 6.81E+14 17.38 ... ... ... ... ... ...
10 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
8.10 arcsec ... ... ... ... ... ... ... B disk exp. scale length 6.81E+14 8.10 ... ... ... ... ... ...
11 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
2.73 arcsec ... ... 1.56 (a/b) ... ... ... 100.23
[B1950]
B exponential scale length 6.81E+14 2.73 ... 0.64 0.36 0.42 50 100
[J2000]
12 ESO-LV IIIa-F
1989ESOLV.C...0000L
0.33 arcsec ... ... ... ... ... ... ... R exponential scale length 4.68E+14 0.33 ... ... ... ... ... ...


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 1974MCG5..C...0000V
Published Object Name         : MCG -06-31-028                
Frequency Targeted            : POSS1 103a-E                  
Major Axis (2a)               : 1.0        arcmin                   2a = 60.00 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : 2b =  0.2       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]      : ...                                 ...
Uncertainty                   : ...                                 ...
Significance                  : No uncertainty reported
Diameter Reference Level      : Intermed. surface brightness  
Frequency                     : 4050         A                      7.40E+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          : 140912          -3400    (B1950)
Qualifiers                    : From new, raw data
NED Comment                   :                                         

No. 2 Published Units: Homogenized Units: Reference Code : 1982ESOU..C...0000L Published Object Name : ESO 384- G 065 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] : 90 deg [B1950] 90 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 : 140912. -340218. (B1950) Qualifiers : From new, raw data NED Comment :
No. 3 Published Units: Homogenized Units: Reference Code : 1989ESOLV.C...0000L Published Object Name : ESO-LV 3840650 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 76.74 arcsec 2a = 76.74 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 383.70 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] : 90.00 deg [B1950] 90 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 : 212.300003 -34.038334 (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 3840650 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 93.33 arcsec 2a = 93.33 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 466.65 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] : 90.00 deg [B1950] 90 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 : 212.300003 -34.038334 (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 3840650 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 50.12 arcsec 2a = 50.12 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 250.60 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] : 90.00 deg [B1950] 90 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 : 212.300003 -34.038334 (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 3840650 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 58.88 arcsec 2a = 58.88 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 294.40 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] : 90.00 deg [B1950] 90 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 : 212.300003 -34.038334 (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 3840650 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 73.28 arcsec 2a = 73.28 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 366.40 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] : 90.00 deg [B1950] 90 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 : 212.300003 -34.038334 (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 3840650 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 38.02 arcsec 2a = 38.02 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 190.10 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] : 90.00 deg [B1950] 90 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 : 212.300003 -34.038334 (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 3840650 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 17.38 arcsec 2a = 17.38 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 : 212.300003 -34.038334 (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 3840650 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 8.10 arcsec 2a = 8.10 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 : 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 : 212.300003 -34.038334 (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 3840650 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 2.73 arcsec 2a = 2.73 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 4.25 arcsec Uncertainty : ... ... Axis Ratio : a/b = 1.56 b/a = 0.64 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.36 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.42 Uncertainty : ... ... Cos-1(b/a) : ... 50 deg Position Angle [Equinox] : 100.23 deg [B1950] 100 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 : 212.300003 -34.038334 (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 3840650 Frequency Targeted : ESO-LV IIIa-F Major Axis (2a) : 0.33 arcsec 2a = 0.33 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 : 212.300003 -34.038334 (B1950) Qualifiers : From new, raw data; Corrected for contaminating sources NED Comment : Derived scale length < 2" mean ESO-B PSF

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