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Date and Time of the Query: 2019-04-22 T19:29:31 PDT
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Diameter data point(s) for object NGC 7151

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 1.50 arcmin ... ... ... ... 75
[B1950]
About 25.5 B-mag arcsec^-2^ 6.81E+14 210.00 ... 0.43 0.57 0.69 65 75
[J2000]
2 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
141.25 arcsec ... ... 2.33 (a/b) ... ... ... 75.00
[B1950]
25.0 B-mag arcsec^-2^ 6.81E+14 141.25 ... 0.43 0.57 0.69 65 75
[J2000]
3 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
169.82 arcsec ... ... 2.33 (a/b) ... ... ... 75.00
[B1950]
26.0 B-mag arcsec^-2^ 6.81E+14 169.82 ... 0.43 0.57 0.69 65 75
[J2000]
4 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
192.75 arcsec ... ... 2.33 (a/b) ... ... ... 75.00
[B1950]
27.0 B-mag arcsec^-2^ 6.81E+14 192.75 ... 0.43 0.57 0.69 65 75
[J2000]
5 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
91.20 arcsec ... ... 2.33 (a/b) ... ... ... 75.00
[B1950]
70% total B light 6.81E+14 91.20 ... 0.43 0.57 0.69 65 75
[J2000]
6 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
105.93 arcsec ... ... 2.33 (a/b) ... ... ... 75.00
[B1950]
80% total B light 6.81E+14 105.93 ... 0.43 0.57 0.69 65 75
[J2000]
7 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
131.83 arcsec ... ... 2.33 (a/b) ... ... ... 75.00
[B1950]
90% total B light 6.81E+14 131.83 ... 0.43 0.57 0.69 65 75
[J2000]
8 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
68.39 arcsec ... ... 2.33 (a/b) ... ... ... 75.00
[B1950]
50% total B light, major dia. 6.81E+14 68.39 ... 0.43 0.57 0.69 65 75
[J2000]
9 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
48.98 arcsec ... ... ... ... ... ... ... 50% total B light, aperture 6.81E+14 48.98 ... ... ... ... ... ...
10 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
30.87 arcsec ... ... ... ... ... ... ... B disk exp. scale length 6.81E+14 30.87 ... ... ... ... ... ...
11 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
44.98 arcsec ... ... 2.88 (a/b) ... ... ... 73.24
[B1950]
B exponential scale length 6.81E+14 44.98 ... 0.35 0.65 0.78 70 73
[J2000]
12 ESO-LV IIIa-F
1989ESOLV.C...0000L
28.72 arcsec ... ... ... ... ... ... ... R exponential scale length 4.68E+14 28.72 ... ... ... ... ... ...
13 RC3 D_25, R_25 (blue)
1991RC3.9.C...0000d
1.47 log(2a) + 1 ... ... 0.40
log(a/b)
0.04 ... ... 75
[J2000]
25.0 B-mag arcsec^-2^ 6.81E+14 177.10 17.10 0.40 0.60 0.73 67 75
[J2000]
14 RC3 D_0 (blue)
1991RC3.9.C...0000d
1.47 log(2a) + 1 ... ... ... ... ... ... ... 25.0 B-mag arcsec^-2^ 6.81E+14 177.10 ... ... ... ... ... ...


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 1982ESOU..C...0000L
Published Object Name         : ESO 237- G 015                
Frequency Targeted            : ESO-Uppsala "Quick Blue" IIa-O
Major Axis (2a)               : 3.50       arcmin                   2a = 210.00 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : 2b =   1.50     arcmin              2b = 90.00 arcsec 
Uncertainty                   : ...                                 ...
Axis Ratio                    : ...                                 b/a = 0.43
Uncertainty                   : ...                                 ...
Ellipticity                   : ...                                 1 - b/a = 0.57
Uncertainty                   : ...                                 ...
Eccentricity                  : ...                                 [(a/b)2-1]/[(a/b)2+1] = 0.69
Uncertainty                   : ...                                 ...
Cos-1(b/a)                    : ...                                 65 deg
Position Angle [Equinox]      :  75    deg [B1950]                  75 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          : 215147.         -505336.    (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 2370150 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 141.25 arcsec 2a = 141.25 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 329.25 arcsec Uncertainty : ... ... Axis Ratio : a/b = 2.33 b/a = 0.43 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.57 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.69 Uncertainty : ... ... Cos-1(b/a) : ... 65 deg Position Angle [Equinox] : 75.00 deg [B1950] 75 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 : 327.945831 -50.893333 (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 2370150 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 169.82 arcsec 2a = 169.82 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 395.85 arcsec Uncertainty : ... ... Axis Ratio : a/b = 2.33 b/a = 0.43 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.57 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.69 Uncertainty : ... ... Cos-1(b/a) : ... 65 deg Position Angle [Equinox] : 75.00 deg [B1950] 75 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 : 327.945831 -50.893333 (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 2370150 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 192.75 arcsec 2a = 192.75 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 449.30 arcsec Uncertainty : ... ... Axis Ratio : a/b = 2.33 b/a = 0.43 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.57 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.69 Uncertainty : ... ... Cos-1(b/a) : ... 65 deg Position Angle [Equinox] : 75.00 deg [B1950] 75 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 : 327.945831 -50.893333 (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 2370150 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 91.20 arcsec 2a = 91.20 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 212.59 arcsec Uncertainty : ... ... Axis Ratio : a/b = 2.33 b/a = 0.43 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.57 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.69 Uncertainty : ... ... Cos-1(b/a) : ... 65 deg Position Angle [Equinox] : 75.00 deg [B1950] 75 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 : 327.945831 -50.893333 (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 2370150 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 105.93 arcsec 2a = 105.93 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 246.92 arcsec Uncertainty : ... ... Axis Ratio : a/b = 2.33 b/a = 0.43 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.57 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.69 Uncertainty : ... ... Cos-1(b/a) : ... 65 deg Position Angle [Equinox] : 75.00 deg [B1950] 75 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 : 327.945831 -50.893333 (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 2370150 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 131.83 arcsec 2a = 131.83 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 307.30 arcsec Uncertainty : ... ... Axis Ratio : a/b = 2.33 b/a = 0.43 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.57 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.69 Uncertainty : ... ... Cos-1(b/a) : ... 65 deg Position Angle [Equinox] : 75.00 deg [B1950] 75 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 : 327.945831 -50.893333 (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 2370150 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 68.39 arcsec 2a = 68.39 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 159.42 arcsec Uncertainty : ... ... Axis Ratio : a/b = 2.33 b/a = 0.43 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.57 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.69 Uncertainty : ... ... Cos-1(b/a) : ... 65 deg Position Angle [Equinox] : 75.00 deg [B1950] 75 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 : 327.945831 -50.893333 (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 2370150 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 48.98 arcsec 2a = 48.98 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 : 327.945831 -50.893333 (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 2370150 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 30.87 arcsec 2a = 30.87 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 : 327.945831 -50.893333 (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 2370150 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 44.98 arcsec 2a = 44.98 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 129.25 arcsec Uncertainty : ... ... Axis Ratio : a/b = 2.88 b/a = 0.35 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.65 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.78 Uncertainty : ... ... Cos-1(b/a) : ... 70 deg Position Angle [Equinox] : 73.24 deg [B1950] 73 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 : 327.945831 -50.893333 (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 2370150 Frequency Targeted : ESO-LV IIIa-F Major Axis (2a) : 28.72 arcsec 2a = 28.72 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 : 327.945831 -50.893333 (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 237- G 015 Frequency Targeted : RC3 D_25, R_25 (blue) Major Axis (2a) : log(2a) + 1 = 1.47 2a = 177.10 arcsec Uncertainty : 0.04 17.10 arcsec Minor Axis (2b) : ... 2b = 70.49 arcsec Uncertainty : ... ... Axis Ratio : log(a/b) = 0.40 b/a = 0.40 Uncertainty : 0.05 0.05 Ellipticity : ... 1 - b/a = 0.60 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.73 Uncertainty : ... ... Cos-1(b/a) : ... 67 deg Position Angle [Equinox] : 75 deg [J2000] 75 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 : 215503.8 -503923. (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 237- G 015 Frequency Targeted : RC3 D_0 (blue) Major Axis (2a) : log(2a) + 1 = 1.47 2a = 177.10 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 : 215503.8 -503923. (J2000) Qualifiers : Homogenized from previously published data NED Comment : Extinction and inclination corrected.

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