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Date and Time of the Query: 2019-04-20 T14:10:06 PDT
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Diameter data point(s) for object IC 1973

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 K_s (2MASS isophotal)
20032MASX.C.......:
8.6 (a) arcsec ... ... 0.480 (b/a) ... ... ... 5
[J2000]
20.0 K-mag arcsec^-2^ 1.38E+14 17.20 ... 0.48 0.52 0.63 61 5
[J2000]
2 K_s (2MASS "total")
20032MASX.C.......:
15.3 (a) arcsec ... ... 0.480 (b/a) ... ... ... 5
[J2000]
Diameter for "total" magnitude 1.38E+14 30.50 ... 0.48 0.52 0.63 61 5
[J2000]
3 ESO-Uppsala "Quick Blue" IIa-O
1982ESOU..C...0000L
0.30 arcmin 0.10 arcmin ... ... ... ... 11
[B1950]
About 25.5 B-mag arcsec^-2^ 6.81E+14 18.00 ... 0.33 0.67 0.80 71 11
[J2000]
4 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
28.84 arcsec ... ... 3.05 (a/b) ... ... ... 10.66
[B1950]
25.0 B-mag arcsec^-2^ 6.81E+14 28.84 ... 0.33 0.67 0.81 71 11
[J2000]
5 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
35.08 arcsec ... ... 3.05 (a/b) ... ... ... 10.66
[B1950]
26.0 B-mag arcsec^-2^ 6.81E+14 35.08 ... 0.33 0.67 0.81 71 11
[J2000]
6 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
42.7 arcsec ... ... 3.049 (a/b) ... ... ... 10.66
[B1950]
27.0 B-mag arcsec^-2^ 6.81E+14 42.70 ... 0.33 0.67 0.81 71 11
[J2000]
7 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
42.66 arcsec ... ... 3.05 (a/b) ... ... ... 10.66
[B1950]
27.0 B-mag arcsec^-2^ 6.81E+14 42.66 ... 0.33 0.67 0.81 71 11
[J2000]
8 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
15.67 arcsec ... ... 3.05 (a/b) ... ... ... 10.66
[B1950]
70% total B light 6.81E+14 15.67 ... 0.33 0.67 0.81 71 11
[J2000]
9 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
19.05 arcsec ... ... 3.05 (a/b) ... ... ... 10.66
[B1950]
80% total B light 6.81E+14 19.05 ... 0.33 0.67 0.81 71 11
[J2000]
10 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
24.83 arcsec ... ... 3.05 (a/b) ... ... ... 10.66
[B1950]
90% total B light 6.81E+14 24.83 ... 0.33 0.67 0.81 71 11
[J2000]
11 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
11.09 arcsec ... ... 3.05 (a/b) ... ... ... 10.66
[B1950]
50% total B light, major dia. 6.81E+14 11.09 ... 0.33 0.67 0.81 71 11
[J2000]
12 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
4.75 arcsec ... ... 3.05 (a/b) ... ... ... 10.66
[B1950]
B exponential scale length 6.81E+14 4.75 ... 0.33 0.67 0.81 71 11
[J2000]
13 ESO-LV IIIa-F
1989ESOLV.C...0000L
2.54 arcsec ... ... ... ... ... ... ... R exponential scale length 4.68E+14 2.54 ... ... ... ... ... ...


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 20032MASX.C.......:
Published Object Name         : 2MASX J03362106-5159390       
Frequency Targeted            : K_s (2MASS isophotal)         
Major Axis (2a)               : a = 8.6        arcsec               2a = 17.20 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : ...                                 2b = 8.26 arcsec
Uncertainty                   : ...                                 ...
Axis Ratio                    : b/a = 0.480                         b/a = 0.48
Uncertainty                   : ...                                 ...
Ellipticity                   : ...                                 1 - b/a = 0.52
Uncertainty                   : ...                                 ...
Eccentricity                  : ...                                 [(a/b)2-1]/[(a/b)2+1] = 0.63
Uncertainty                   : ...                                 ...
Cos-1(b/a)                    : ...                                 61 deg
Position Angle [Equinox]      :    5   deg [J2000]                  5 deg [J2000]
Uncertainty                   : ...                                 ...
Significance                  : No uncertainty reported
Diameter Reference Level      : 20.0 K-mag arcsec^-2^         
Frequency                     : 2.17         microns                1.38E+14 Hz
Frequency Mode                : Broad-band detector (e.g. photographic plate)

Measurement Mode               
    Detector Type             : Maps (e.g., 2MASS, VLA, Sloan)
    Fitting Technique         : Ellipse fitting to image
    Measured Quantity         : Isophotal diameter
    Qualifiers                : A radius is given in DIA_MAJ, not a diameter
Coordinates Targeted          : 54.087601       -51.994179    (J2000)
Qualifiers                    : From new, raw data
NED Comment                   :                                         

No. 2 Published Units: Homogenized Units: Reference Code : 20032MASX.C.......: Published Object Name : 2MASX J03362106-5159390 Frequency Targeted : K_s (2MASS "total") Major Axis (2a) : a = 15.3 arcsec 2a = 30.50 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 14.64 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.480 b/a = 0.48 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.52 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.63 Uncertainty : ... ... Cos-1(b/a) : ... 61 deg Position Angle [Equinox] : 5 deg [J2000] 5 deg [J2000] Uncertainty : ... ... Significance : No uncertainty reported Diameter Reference Level : Diameter for "total" magnitude Frequency : 2.17 microns 1.38E+14 Hz Frequency Mode : Broad-band detector (e.g. photographic plate) Measurement Mode Detector Type : Maps (e.g., 2MASS, VLA, Sloan) Fitting Technique : Ellipse fitting to image Measured Quantity : Isophotal diameter Qualifiers : A radius is given in DIA_MAJ, not a diameter Coordinates Targeted : 54.087601 -51.994179 (J2000) Qualifiers : From new, raw data NED Comment :
No. 3 Published Units: Homogenized Units: Reference Code : 1982ESOU..C...0000L Published Object Name : ESO 200-IG 049 Frequency Targeted : ESO-Uppsala "Quick Blue" IIa-O Major Axis (2a) : 0.30 arcmin 2a = 18.00 arcsec Uncertainty : ... ... Minor Axis (2b) : 2b = 0.10 arcmin 2b = 6.00 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] : 11 deg [B1950] 11 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 : 033457. -520930. (B1950) Qualifiers : From new, raw data NED Comment : Diameters and PA flagged uncertain.
No. 4 Published Units: Homogenized Units: Reference Code : 1989ESOLV.C...0000L Published Object Name : ESO-LV 2000490 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 28.84 arcsec 2a = 28.84 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 87.93 arcsec Uncertainty : ... ... Axis Ratio : a/b = 3.05 b/a = 0.33 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.67 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.81 Uncertainty : ... ... Cos-1(b/a) : ... 71 deg Position Angle [Equinox] : 10.66 deg [B1950] 11 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 : 53.737499 -52.158333 (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 2000490 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 35.08 arcsec 2a = 35.08 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 106.95 arcsec Uncertainty : ... ... Axis Ratio : a/b = 3.05 b/a = 0.33 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.67 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.81 Uncertainty : ... ... Cos-1(b/a) : ... 71 deg Position Angle [Equinox] : 10.66 deg [B1950] 11 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 : 53.737499 -52.158333 (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 2000490 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 42.7 arcsec 2a = 42.70 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 130.18 arcsec Uncertainty : ... ... Axis Ratio : a/b = 3.049 b/a = 0.33 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.67 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.81 Uncertainty : ... ... Cos-1(b/a) : ... 71 deg Position Angle [Equinox] : 10.66 deg [B1950] 11 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 : 53.73750 -52.15833 (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 2000490 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 42.66 arcsec 2a = 42.66 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 130.06 arcsec Uncertainty : ... ... Axis Ratio : a/b = 3.05 b/a = 0.33 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.67 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.81 Uncertainty : ... ... Cos-1(b/a) : ... 71 deg Position Angle [Equinox] : 10.66 deg [B1950] 11 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 : 53.737499 -52.158333 (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 2000490 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 15.67 arcsec 2a = 15.67 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 47.77 arcsec Uncertainty : ... ... Axis Ratio : a/b = 3.05 b/a = 0.33 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.67 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.81 Uncertainty : ... ... Cos-1(b/a) : ... 71 deg Position Angle [Equinox] : 10.66 deg [B1950] 11 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 : 53.737499 -52.158333 (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 2000490 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 19.05 arcsec 2a = 19.05 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 58.08 arcsec Uncertainty : ... ... Axis Ratio : a/b = 3.05 b/a = 0.33 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.67 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.81 Uncertainty : ... ... Cos-1(b/a) : ... 71 deg Position Angle [Equinox] : 10.66 deg [B1950] 11 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 : 53.737499 -52.158333 (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 2000490 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 24.83 arcsec 2a = 24.83 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 75.70 arcsec Uncertainty : ... ... Axis Ratio : a/b = 3.05 b/a = 0.33 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.67 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.81 Uncertainty : ... ... Cos-1(b/a) : ... 71 deg Position Angle [Equinox] : 10.66 deg [B1950] 11 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 : 53.737499 -52.158333 (B1950) Qualifiers : From new, raw data; Corrected for contaminating sources NED Comment : Elliptical isophote
No. 11 Published Units: Homogenized Units: Reference Code : 1989ESOLV.C...0000L Published Object Name : ESO-LV 2000490 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 11.09 arcsec 2a = 11.09 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 33.81 arcsec Uncertainty : ... ... Axis Ratio : a/b = 3.05 b/a = 0.33 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.67 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.81 Uncertainty : ... ... Cos-1(b/a) : ... 71 deg Position Angle [Equinox] : 10.66 deg [B1950] 11 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 : 53.737499 -52.158333 (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 2000490 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 4.75 arcsec 2a = 4.75 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 14.48 arcsec Uncertainty : ... ... Axis Ratio : a/b = 3.05 b/a = 0.33 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.67 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.81 Uncertainty : ... ... Cos-1(b/a) : ... 71 deg Position Angle [Equinox] : 10.66 deg [B1950] 11 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 : 53.737499 -52.158333 (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 2000490 Frequency Targeted : ESO-LV IIIa-F Major Axis (2a) : 2.54 arcsec 2a = 2.54 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 : 53.737499 -52.158333 (B1950) Qualifiers : From new, raw data; Corrected for contaminating sources NED Comment : From fits to surf. brightness in octants

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