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Date and Time of the Query: 2019-06-17 T01:56:49 PDT
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Diameter data point(s) for object IC 4873

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.......:
16.5 (a) arcsec ... ... 0.560 (b/a) ... ... ... 90
[J2000]
20.0 K-mag arcsec^-2^ 1.38E+14 33.00 ... 0.56 0.44 0.52 56 90
[J2000]
2 K_s (2MASS "total")
20032MASX.C.......:
41.4 (a) arcsec ... ... 0.560 (b/a) ... ... ... 90
[J2000]
Diameter for "total" magnitude 1.38E+14 82.90 ... 0.56 0.44 0.52 56 90
[J2000]
3 ESO-Uppsala "Quick Blue" IIa-O
1982ESOU..C...0000L
1.20 arcmin 0.80 arcmin ... ... ... ... 25
[B1950]
About 25.5 B-mag arcsec^-2^ 6.81E+14 72.00 ... 0.67 0.33 0.38 48 25
[J2000]
4 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
56.23 arcsec ... ... 1.50 (a/b) ... ... ... 25.00
[B1950]
25.0 B-mag arcsec^-2^ 6.81E+14 56.23 ... 0.67 0.33 0.38 48 25
[J2000]
5 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
69.98 arcsec ... ... 1.50 (a/b) ... ... ... 25.00
[B1950]
26.0 B-mag arcsec^-2^ 6.81E+14 69.98 ... 0.67 0.33 0.38 48 25
[J2000]
6 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
80.35 arcsec ... ... 1.50 (a/b) ... ... ... 25.00
[B1950]
27.0 B-mag arcsec^-2^ 6.81E+14 80.35 ... 0.67 0.33 0.38 48 25
[J2000]
7 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
38.46 arcsec ... ... 1.50 (a/b) ... ... ... 25.00
[B1950]
70% total B light 6.81E+14 38.46 ... 0.67 0.33 0.38 48 25
[J2000]
8 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
45.19 arcsec ... ... 1.50 (a/b) ... ... ... 25.00
[B1950]
80% total B light 6.81E+14 45.19 ... 0.67 0.33 0.38 48 25
[J2000]
9 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
56.89 arcsec ... ... 1.50 (a/b) ... ... ... 25.00
[B1950]
90% total B light 6.81E+14 56.89 ... 0.67 0.33 0.38 48 25
[J2000]
10 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
28.18 arcsec ... ... 1.50 (a/b) ... ... ... 25.00
[B1950]
50% total B light, major dia. 6.81E+14 28.18 ... 0.67 0.33 0.38 48 25
[J2000]
11 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
22.39 arcsec ... ... ... ... ... ... ... 50% total B light, aperture 6.81E+14 22.39 ... ... ... ... ... ...
12 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
7.98 arcsec ... ... ... ... ... ... ... B disk exp. scale length 6.81E+14 7.98 ... ... ... ... ... ...
13 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
10.57 arcsec ... ... 1.19 (a/b) ... ... ... 39.28
[B1950]
B exponential scale length 6.81E+14 10.57 ... 0.84 0.16 0.17 33 39
[J2000]
14 ESO-LV IIIa-F
1989ESOLV.C...0000L
7.13 arcsec ... ... ... ... ... ... ... R exponential scale length 4.68E+14 7.13 ... ... ... ... ... ...


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 20032MASX.C.......:
Published Object Name         : 2MASX J19345467-4608091       
Frequency Targeted            : K_s (2MASS isophotal)         
Major Axis (2a)               : a = 16.5       arcsec               2a = 33.00 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : ...                                 2b = 18.48 arcsec
Uncertainty                   : ...                                 ...
Axis Ratio                    : b/a = 0.560                         b/a = 0.56
Uncertainty                   : ...                                 ...
Ellipticity                   : ...                                 1 - b/a = 0.44
Uncertainty                   : ...                                 ...
Eccentricity                  : ...                                 [(a/b)2-1]/[(a/b)2+1] = 0.52
Uncertainty                   : ...                                 ...
Cos-1(b/a)                    : ...                                 56 deg
Position Angle [Equinox]      :   90   deg [J2000]                  90 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          : 293.727875      -46.135834    (J2000)
Qualifiers                    : From new, raw data
NED Comment                   :                                         

No. 2 Published Units: Homogenized Units: Reference Code : 20032MASX.C.......: Published Object Name : 2MASX J19345467-4608091 Frequency Targeted : K_s (2MASS "total") Major Axis (2a) : a = 41.4 arcsec 2a = 82.90 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 46.42 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.560 b/a = 0.56 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.44 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.52 Uncertainty : ... ... Cos-1(b/a) : ... 56 deg Position Angle [Equinox] : 90 deg [J2000] 90 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 : 293.727875 -46.135834 (J2000) Qualifiers : From new, raw data NED Comment :
No. 3 Published Units: Homogenized Units: Reference Code : 1982ESOU..C...0000L Published Object Name : ESO 283- G 008 Frequency Targeted : ESO-Uppsala "Quick Blue" IIa-O Major Axis (2a) : 1.20 arcmin 2a = 72.00 arcsec Uncertainty : ... ... Minor Axis (2b) : 2b = 0.80 arcmin 2b = 48.00 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.67 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.33 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.38 Uncertainty : ... ... Cos-1(b/a) : ... 48 deg Position Angle [Equinox] : 25 deg [B1950] 25 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 : 193117. -461442. (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 2830080 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 56.23 arcsec 2a = 56.23 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 84.30 arcsec Uncertainty : ... ... Axis Ratio : a/b = 1.50 b/a = 0.67 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.33 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.38 Uncertainty : ... ... Cos-1(b/a) : ... 48 deg Position Angle [Equinox] : 25.00 deg [B1950] 25 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 : 292.820831 -46.244999 (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 2830080 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 69.98 arcsec 2a = 69.98 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 104.92 arcsec Uncertainty : ... ... Axis Ratio : a/b = 1.50 b/a = 0.67 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.33 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.38 Uncertainty : ... ... Cos-1(b/a) : ... 48 deg Position Angle [Equinox] : 25.00 deg [B1950] 25 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 : 292.820831 -46.244999 (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 2830080 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 80.35 arcsec 2a = 80.35 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 120.46 arcsec Uncertainty : ... ... Axis Ratio : a/b = 1.50 b/a = 0.67 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.33 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.38 Uncertainty : ... ... Cos-1(b/a) : ... 48 deg Position Angle [Equinox] : 25.00 deg [B1950] 25 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 : 292.820831 -46.244999 (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 2830080 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 38.46 arcsec 2a = 38.46 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 57.66 arcsec Uncertainty : ... ... Axis Ratio : a/b = 1.50 b/a = 0.67 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.33 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.38 Uncertainty : ... ... Cos-1(b/a) : ... 48 deg Position Angle [Equinox] : 25.00 deg [B1950] 25 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 : 292.820831 -46.244999 (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 2830080 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 45.19 arcsec 2a = 45.19 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 67.75 arcsec Uncertainty : ... ... Axis Ratio : a/b = 1.50 b/a = 0.67 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.33 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.38 Uncertainty : ... ... Cos-1(b/a) : ... 48 deg Position Angle [Equinox] : 25.00 deg [B1950] 25 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 : 292.820831 -46.244999 (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 2830080 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 56.89 arcsec 2a = 56.89 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 85.29 arcsec Uncertainty : ... ... Axis Ratio : a/b = 1.50 b/a = 0.67 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.33 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.38 Uncertainty : ... ... Cos-1(b/a) : ... 48 deg Position Angle [Equinox] : 25.00 deg [B1950] 25 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 : 292.820831 -46.244999 (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 2830080 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 28.18 arcsec 2a = 28.18 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 42.25 arcsec Uncertainty : ... ... Axis Ratio : a/b = 1.50 b/a = 0.67 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.33 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.38 Uncertainty : ... ... Cos-1(b/a) : ... 48 deg Position Angle [Equinox] : 25.00 deg [B1950] 25 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 : 292.820831 -46.244999 (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 2830080 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 : 292.820831 -46.244999 (B1950) Qualifiers : From new, raw data; Corrected for contaminating sources NED Comment : Circular aperture
No. 12 Published Units: Homogenized Units: Reference Code : 1989ESOLV.C...0000L Published Object Name : ESO-LV 2830080 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 7.98 arcsec 2a = 7.98 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 : 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 : 292.820831 -46.244999 (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 : 1989ESOLV.C...0000L Published Object Name : ESO-LV 2830080 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 10.57 arcsec 2a = 10.57 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 12.54 arcsec Uncertainty : ... ... Axis Ratio : a/b = 1.19 b/a = 0.84 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.16 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.17 Uncertainty : ... ... Cos-1(b/a) : ... 33 deg Position Angle [Equinox] : 39.28 deg [B1950] 39 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 : 292.820831 -46.244999 (B1950) Qualifiers : From new, raw data; Corrected for contaminating sources NED Comment : Elliptical isophote
No. 14 Published Units: Homogenized Units: Reference Code : 1989ESOLV.C...0000L Published Object Name : ESO-LV 2830080 Frequency Targeted : ESO-LV IIIa-F Major Axis (2a) : 7.13 arcsec 2a = 7.13 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 : 292.820831 -46.244999 (B1950) Qualifiers : From new, raw data; Corrected for contaminating sources NED Comment : From fits to surf. brightness in octants

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