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Date and Time of the Query: 2019-05-26 T04:29:27 PDT
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Diameter data point(s) for object NGC 1427A

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
2.0 arcmin 1.2 arcmin ... ... ... ... ... Very low surface brightness 7.40E+14 120.00 ... 0.60 0.40 0.47 53 ...
2 ESO-Uppsala "Quick Blue" IIa-O
1982ESOU..C...0000L
3.30 arcmin 2.10 arcmin ... ... ... ... 76
[B1950]
About 25.5 B-mag arcsec^-2^ 6.81E+14 198.00 ... 0.64 0.36 0.42 51 76
[J2000]
3 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
138.04 arcsec ... ... 1.57 (a/b) ... ... ... 76.00
[B1950]
25.0 B-mag arcsec^-2^ 6.81E+14 138.04 ... 0.64 0.36 0.42 51 76
[J2000]
4 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
175.79 arcsec ... ... 1.57 (a/b) ... ... ... 76.00
[B1950]
26.0 B-mag arcsec^-2^ 6.81E+14 175.79 ... 0.64 0.36 0.42 51 76
[J2000]
5 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
254.10 arcsec ... ... 1.57 (a/b) ... ... ... 76.00
[B1950]
27.0 B-mag arcsec^-2^ 6.81E+14 254.10 ... 0.64 0.36 0.42 51 76
[J2000]
6 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
114.82 arcsec ... ... 1.57 (a/b) ... ... ... 76.00
[B1950]
70% total B light 6.81E+14 114.82 ... 0.64 0.36 0.42 51 76
[J2000]
7 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
136.46 arcsec ... ... 1.57 (a/b) ... ... ... 76.00
[B1950]
80% total B light 6.81E+14 136.46 ... 0.64 0.36 0.42 51 76
[J2000]
8 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
181.97 arcsec ... ... 1.57 (a/b) ... ... ... 76.00
[B1950]
90% total B light 6.81E+14 181.97 ... 0.64 0.36 0.42 51 76
[J2000]
9 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
89.13 arcsec ... ... 1.57 (a/b) ... ... ... 76.00
[B1950]
50% total B light, major dia. 6.81E+14 89.13 ... 0.64 0.36 0.42 51 76
[J2000]
10 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
72.44 arcsec ... ... ... ... ... ... ... 50% total B light, aperture 6.81E+14 72.44 ... ... ... ... ... ...
11 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
328.64 arcsec ... ... ... ... ... ... ... B disk exp. scale length 6.81E+14 328.64 ... ... ... ... ... ...
12 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
72.23 arcsec ... ... 1.99 (a/b) ... ... ... 91.20
[B1950]
B exponential scale length 6.81E+14 72.23 ... 0.50 0.50 0.60 60 91
[J2000]
13 ESO-LV IIIa-F
1989ESOLV.C...0000L
67.00 arcsec ... ... ... ... ... ... ... R exponential scale length 4.68E+14 67.00 ... ... ... ... ... ...
14 RC3 D_25, R_25 (blue)
1991RC3.9.C...0000d
1.37 log(2a) + 1 ... ... 0.20
log(a/b)
0.04 ... ... 76
[J2000]
25.0 B-mag arcsec^-2^ 6.81E+14 140.70 13.60 0.63 0.37 0.43 51 76
[J2000]
15 RC3 D_0 (blue)
1991RC3.9.C...0000d
1.37 log(2a) + 1 ... ... ... ... ... ... ... 25.0 B-mag arcsec^-2^ 6.81E+14 140.70 ... ... ... ... ... ...


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 1974MCG5..C...0000V
Published Object Name         : MCG -06-09-016                
Frequency Targeted            : POSS1 103a-E                  
Major Axis (2a)               : 2.0        arcmin                   2a = 120.00 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : 2b =  1.2       arcmin              2b = 72.00 arcsec 
Uncertainty                   : ...                                 ...
Axis Ratio                    : ...                                 b/a = 0.60
Uncertainty                   : ...                                 ...
Ellipticity                   : ...                                 1 - b/a = 0.40
Uncertainty                   : ...                                 ...
Eccentricity                  : ...                                 [(a/b)2-1]/[(a/b)2+1] = 0.47
Uncertainty                   : ...                                 ...
Cos-1(b/a)                    : ...                                 53 deg
Position Angle [Equinox]      : ...                                 ...
Uncertainty                   : ...                                 ...
Significance                  : No uncertainty reported
Diameter Reference Level      : Very low 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          : 033818          -3547    (B1950)
Qualifiers                    : From new, raw data
NED Comment                   :                                         

No. 2 Published Units: Homogenized Units: Reference Code : 1982ESOU..C...0000L Published Object Name : ESO 358- G 049 Frequency Targeted : ESO-Uppsala "Quick Blue" IIa-O Major Axis (2a) : 3.30 arcmin 2a = 198.00 arcsec Uncertainty : ... ... Minor Axis (2b) : 2b = 2.10 arcmin 2b = 126.00 arcsec Uncertainty : ... ... Axis Ratio : ... 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) : ... 51 deg Position Angle [Equinox] : 76 deg [B1950] 76 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 : 033815. -354654. (B1950) Qualifiers : From new, raw data NED Comment : Diameters flagged uncertain.
No. 3 Published Units: Homogenized Units: Reference Code : 1989ESOLV.C...0000L Published Object Name : ESO-LV 3580490 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 138.04 arcsec 2a = 138.04 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 217.04 arcsec Uncertainty : ... ... Axis Ratio : a/b = 1.57 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) : ... 51 deg Position Angle [Equinox] : 76.00 deg [B1950] 76 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 : 54.562500 -35.781666 (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 3580490 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 175.79 arcsec 2a = 175.79 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 276.40 arcsec Uncertainty : ... ... Axis Ratio : a/b = 1.57 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) : ... 51 deg Position Angle [Equinox] : 76.00 deg [B1950] 76 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 : 54.562500 -35.781666 (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 3580490 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 254.10 arcsec 2a = 254.10 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 399.53 arcsec Uncertainty : ... ... Axis Ratio : a/b = 1.57 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) : ... 51 deg Position Angle [Equinox] : 76.00 deg [B1950] 76 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 : 54.562500 -35.781666 (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 3580490 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 114.82 arcsec 2a = 114.82 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 180.53 arcsec Uncertainty : ... ... Axis Ratio : a/b = 1.57 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) : ... 51 deg Position Angle [Equinox] : 76.00 deg [B1950] 76 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 : 54.562500 -35.781666 (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 3580490 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 136.46 arcsec 2a = 136.46 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 214.56 arcsec Uncertainty : ... ... Axis Ratio : a/b = 1.57 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) : ... 51 deg Position Angle [Equinox] : 76.00 deg [B1950] 76 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 : 54.562500 -35.781666 (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 3580490 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 181.97 arcsec 2a = 181.97 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 286.12 arcsec Uncertainty : ... ... Axis Ratio : a/b = 1.57 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) : ... 51 deg Position Angle [Equinox] : 76.00 deg [B1950] 76 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 : 54.562500 -35.781666 (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 3580490 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 89.13 arcsec 2a = 89.13 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 140.14 arcsec Uncertainty : ... ... Axis Ratio : a/b = 1.57 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) : ... 51 deg Position Angle [Equinox] : 76.00 deg [B1950] 76 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 : 54.562500 -35.781666 (B1950) Qualifiers : From new, raw data; Corrected for contaminating sources NED Comment : Elliptical isophote
No. 10 Published Units: Homogenized Units: Reference Code : 1989ESOLV.C...0000L Published Object Name : ESO-LV 3580490 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 72.44 arcsec 2a = 72.44 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 : 54.562500 -35.781666 (B1950) Qualifiers : From new, raw data; Corrected for contaminating sources NED Comment : Circular aperture
No. 11 Published Units: Homogenized Units: Reference Code : 1989ESOLV.C...0000L Published Object Name : ESO-LV 3580490 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 328.64 arcsec 2a = 328.64 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 : 54.562500 -35.781666 (B1950) Qualifiers : From new, raw data; Corrected for contaminating sources NED Comment : From fits to surf. brightness in octants
No. 12 Published Units: Homogenized Units: Reference Code : 1989ESOLV.C...0000L Published Object Name : ESO-LV 3580490 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 72.23 arcsec 2a = 72.23 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 143.88 arcsec Uncertainty : ... ... Axis Ratio : a/b = 1.99 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] : 91.20 deg [B1950] 91 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 : 54.562500 -35.781666 (B1950) Qualifiers : From new, raw data; Corrected for contaminating sources NED Comment : Elliptical isophote
No. 13 Published Units: Homogenized Units: Reference Code : 1989ESOLV.C...0000L Published Object Name : ESO-LV 3580490 Frequency Targeted : ESO-LV IIIa-F Major Axis (2a) : 67.00 arcsec 2a = 67.00 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 : 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 : 54.562500 -35.781666 (B1950) Qualifiers : From new, raw data; Corrected for contaminating sources NED Comment : From fits to surf. brightness in octants
No. 14 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : ESO 358- G 049 Frequency Targeted : RC3 D_25, R_25 (blue) Major Axis (2a) : log(2a) + 1 = 1.37 2a = 140.70 arcsec Uncertainty : 0.04 13.60 arcsec Minor Axis (2b) : ... 2b = 88.78 arcsec Uncertainty : ... ... Axis Ratio : log(a/b) = 0.20 b/a = 0.63 Uncertainty : 0.04 0.06 Ellipticity : ... 1 - b/a = 0.37 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.43 Uncertainty : ... ... Cos-1(b/a) : ... 51 deg Position Angle [Equinox] : 76 deg [J2000] 76 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 : 034009.6 -353716. (J2000) Qualifiers : Homogenized from previously published data NED Comment :
No. 15 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : ESO 358- G 049 Frequency Targeted : RC3 D_0 (blue) Major Axis (2a) : log(2a) + 1 = 1.37 2a = 140.70 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 : 034009.6 -353716. (J2000) Qualifiers : Homogenized from previously published data NED Comment : Extinction and inclination corrected.

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