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Date and Time of the Query: 2019-05-22 T14:11:07 PDT
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Diameter data point(s) for object IC 4984

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.......:
18.2 (a) arcsec ... ... 0.460 (b/a) ... ... ... -70
[J2000]
20.0 K-mag arcsec^-2^ 1.38E+14 36.40 ... 0.46 0.54 0.65 63 110
[J2000]
2 K_s (2MASS "total")
20032MASX.C.......:
37.2 (a) arcsec ... ... 0.460 (b/a) ... ... ... -70
[J2000]
Diameter for "total" magnitude 1.38E+14 74.40 ... 0.46 0.54 0.65 63 110
[J2000]
3 ESO-Uppsala "Quick Blue" IIa-O
1982ESOU..C...0000L
0.90 arcmin 0.50 arcmin ... ... ... ... 116
[B1950]
About 25.5 B-mag arcsec^-2^ 6.81E+14 54.00 ... 0.56 0.44 0.53 56 116
[J2000]
4 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
53.09 arcsec ... ... 1.80 (a/b) ... ... ... 116.00
[B1950]
25.0 B-mag arcsec^-2^ 6.81E+14 53.09 ... 0.56 0.44 0.53 56 116
[J2000]
5 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
63.83 arcsec ... ... 1.80 (a/b) ... ... ... 116.00
[B1950]
26.0 B-mag arcsec^-2^ 6.81E+14 63.83 ... 0.56 0.44 0.53 56 116
[J2000]
6 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
35.08 arcsec ... ... 1.80 (a/b) ... ... ... 116.00
[B1950]
70% total B light 6.81E+14 35.08 ... 0.56 0.44 0.53 56 116
[J2000]
7 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
41.21 arcsec ... ... 1.80 (a/b) ... ... ... 116.00
[B1950]
80% total B light 6.81E+14 41.21 ... 0.56 0.44 0.53 56 116
[J2000]
8 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
50.70 arcsec ... ... 1.80 (a/b) ... ... ... 116.00
[B1950]
90% total B light 6.81E+14 50.70 ... 0.56 0.44 0.53 56 116
[J2000]
9 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
25.70 arcsec ... ... 1.80 (a/b) ... ... ... 116.00
[B1950]
50% total B light, major dia. 6.81E+14 25.70 ... 0.56 0.44 0.53 56 116
[J2000]
10 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
19.05 arcsec ... ... ... ... ... ... ... 50% total B light, aperture 6.81E+14 19.05 ... ... ... ... ... ...
11 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
17.41 arcsec ... ... ... ... ... ... ... B disk exp. scale length 6.81E+14 17.41 ... ... ... ... ... ...
12 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
1.86 arcsec ... ... 3.28 (a/b) ... ... ... 117.18
[B1950]
B exponential scale length 6.81E+14 1.86 ... 0.30 0.70 0.83 72 117
[J2000]
13 ESO-LV IIIa-F
1989ESOLV.C...0000L
0.24 arcsec ... ... ... ... ... ... ... R exponential scale length 4.68E+14 0.24 ... ... ... ... ... ...


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 20032MASX.C.......:
Published Object Name         : 2MASX J20161744-5242135       
Frequency Targeted            : K_s (2MASS isophotal)         
Major Axis (2a)               : a = 18.2       arcsec               2a = 36.40 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : ...                                 2b = 16.74 arcsec
Uncertainty                   : ...                                 ...
Axis Ratio                    : b/a = 0.460                         b/a = 0.46
Uncertainty                   : ...                                 ...
Ellipticity                   : ...                                 1 - b/a = 0.54
Uncertainty                   : ...                                 ...
Eccentricity                  : ...                                 [(a/b)2-1]/[(a/b)2+1] = 0.65
Uncertainty                   : ...                                 ...
Cos-1(b/a)                    : ...                                 63 deg
Position Angle [Equinox]      :  -70   deg [J2000]                  110 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          : 304.072693      -52.703735    (J2000)
Qualifiers                    : From new, raw data
NED Comment                   :                                         

No. 2 Published Units: Homogenized Units: Reference Code : 20032MASX.C.......: Published Object Name : 2MASX J20161744-5242135 Frequency Targeted : K_s (2MASS "total") Major Axis (2a) : a = 37.2 arcsec 2a = 74.40 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 34.22 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.460 b/a = 0.46 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.54 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.65 Uncertainty : ... ... Cos-1(b/a) : ... 63 deg Position Angle [Equinox] : -70 deg [J2000] 110 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 : 304.072693 -52.703735 (J2000) Qualifiers : From new, raw data NED Comment :
No. 3 Published Units: Homogenized Units: Reference Code : 1982ESOU..C...0000L Published Object Name : ESO 186- G 023 Frequency Targeted : ESO-Uppsala "Quick Blue" IIa-O Major Axis (2a) : 0.90 arcmin 2a = 54.00 arcsec Uncertainty : ... ... Minor Axis (2b) : 2b = 0.50 arcmin 2b = 30.00 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.56 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.44 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.53 Uncertainty : ... ... Cos-1(b/a) : ... 56 deg Position Angle [Equinox] : 116 deg [B1950] 116 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 : 201230. -525124. (B1950) Qualifiers : From new, raw data NED Comment :
No. 4 Published Units: Homogenized Units: Reference Code : 1989ESOLV.C...0000L Published Object Name : ESO-LV 1860230 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 53.09 arcsec 2a = 53.09 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 95.49 arcsec Uncertainty : ... ... Axis Ratio : a/b = 1.80 b/a = 0.56 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.44 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.53 Uncertainty : ... ... Cos-1(b/a) : ... 56 deg Position Angle [Equinox] : 116.00 deg [B1950] 116 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 : 303.125000 -52.856667 (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 1860230 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 63.83 arcsec 2a = 63.83 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 114.80 arcsec Uncertainty : ... ... Axis Ratio : a/b = 1.80 b/a = 0.56 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.44 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.53 Uncertainty : ... ... Cos-1(b/a) : ... 56 deg Position Angle [Equinox] : 116.00 deg [B1950] 116 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 : 303.125000 -52.856667 (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 1860230 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 35.08 arcsec 2a = 35.08 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 63.09 arcsec Uncertainty : ... ... Axis Ratio : a/b = 1.80 b/a = 0.56 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.44 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.53 Uncertainty : ... ... Cos-1(b/a) : ... 56 deg Position Angle [Equinox] : 116.00 deg [B1950] 116 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 : 303.125000 -52.856667 (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 1860230 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 41.21 arcsec 2a = 41.21 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 74.12 arcsec Uncertainty : ... ... Axis Ratio : a/b = 1.80 b/a = 0.56 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.44 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.53 Uncertainty : ... ... Cos-1(b/a) : ... 56 deg Position Angle [Equinox] : 116.00 deg [B1950] 116 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 : 303.125000 -52.856667 (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 1860230 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 50.70 arcsec 2a = 50.70 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 91.19 arcsec Uncertainty : ... ... Axis Ratio : a/b = 1.80 b/a = 0.56 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.44 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.53 Uncertainty : ... ... Cos-1(b/a) : ... 56 deg Position Angle [Equinox] : 116.00 deg [B1950] 116 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 : 303.125000 -52.856667 (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 1860230 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 25.70 arcsec 2a = 25.70 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 46.22 arcsec Uncertainty : ... ... Axis Ratio : a/b = 1.80 b/a = 0.56 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.44 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.53 Uncertainty : ... ... Cos-1(b/a) : ... 56 deg Position Angle [Equinox] : 116.00 deg [B1950] 116 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 : 303.125000 -52.856667 (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 1860230 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 19.05 arcsec 2a = 19.05 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 : 303.125000 -52.856667 (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 1860230 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 17.41 arcsec 2a = 17.41 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 : 303.125000 -52.856667 (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 1860230 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 1.86 arcsec 2a = 1.86 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 6.10 arcsec Uncertainty : ... ... Axis Ratio : a/b = 3.28 b/a = 0.30 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.70 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.83 Uncertainty : ... ... Cos-1(b/a) : ... 72 deg Position Angle [Equinox] : 117.18 deg [B1950] 117 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 : 303.125000 -52.856667 (B1950) Qualifiers : From new, raw data; Corrected for contaminating sources NED Comment : Derived scale length < 2" mean ESO-B PSF
No. 13 Published Units: Homogenized Units: Reference Code : 1989ESOLV.C...0000L Published Object Name : ESO-LV 1860230 Frequency Targeted : ESO-LV IIIa-F Major Axis (2a) : 0.24 arcsec 2a = 0.24 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 : 303.125000 -52.856667 (B1950) Qualifiers : From new, raw data; Corrected for contaminating sources NED Comment : Derived scale length < 2" mean ESO-B PSF

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