NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-06-18 T09:13:28 PDT
Help | Comment | NED Home

Diameter data point(s) for object IC 4989

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.......:
30.5 (a) arcsec ... ... 0.240 (b/a) ... ... ... -25
[J2000]
20.0 K-mag arcsec^-2^ 1.38E+14 61.00 ... 0.24 0.76 0.89 76 155
[J2000]
2 K_s (2MASS "total")
20032MASX.C.......:
46.2 (a) arcsec ... ... 0.240 (b/a) ... ... ... -25
[J2000]
Diameter for "total" magnitude 1.38E+14 92.30 ... 0.24 0.76 0.89 76 155
[J2000]
3 ESO-Uppsala "Quick Blue" IIa-O
1982ESOU..C...0000L
1.20 arcmin 0.30 arcmin ... ... ... ... 154
[B1950]
About 25.5 B-mag arcsec^-2^ 6.81E+14 72.00 ... 0.25 0.75 0.88 76 154
[J2000]
4 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
70.79 arcsec ... ... 4.00 (a/b) ... ... ... 154.00
[B1950]
25.0 B-mag arcsec^-2^ 6.81E+14 70.79 ... 0.25 0.75 0.88 76 154
[J2000]
5 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
86.10 arcsec ... ... 4.00 (a/b) ... ... ... 154.00
[B1950]
26.0 B-mag arcsec^-2^ 6.81E+14 86.10 ... 0.25 0.75 0.88 76 154
[J2000]
6 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
105.93 arcsec ... ... 4.00 (a/b) ... ... ... 154.00
[B1950]
27.0 B-mag arcsec^-2^ 6.81E+14 105.93 ... 0.25 0.75 0.88 76 154
[J2000]
7 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
44.67 arcsec ... ... 4.00 (a/b) ... ... ... 154.00
[B1950]
70% total B light 6.81E+14 44.67 ... 0.25 0.75 0.88 76 154
[J2000]
8 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
53.70 arcsec ... ... 4.00 (a/b) ... ... ... 154.00
[B1950]
80% total B light 6.81E+14 53.70 ... 0.25 0.75 0.88 76 154
[J2000]
9 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
69.98 arcsec ... ... 4.00 (a/b) ... ... ... 154.00
[B1950]
90% total B light 6.81E+14 69.98 ... 0.25 0.75 0.88 76 154
[J2000]
10 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
33.11 arcsec ... ... 4.00 (a/b) ... ... ... 154.00
[B1950]
50% total B light, major dia. 6.81E+14 33.11 ... 0.25 0.75 0.88 76 154
[J2000]
11 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
21.13 arcsec ... ... ... ... ... ... ... 50% total B light, aperture 6.81E+14 21.13 ... ... ... ... ... ...
12 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
12.99 arcsec ... ... ... ... ... ... ... B disk exp. scale length 6.81E+14 12.99 ... ... ... ... ... ...
13 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
16.05 arcsec ... ... 3.73 (a/b) ... ... ... 155.05
[B1950]
B exponential scale length 6.81E+14 16.05 ... 0.27 0.73 0.87 74 155
[J2000]
14 ESO-LV IIIa-F
1989ESOLV.C...0000L
16.52 arcsec ... ... ... ... ... ... ... R exponential scale length 4.68E+14 16.52 ... ... ... ... ... ...


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 20032MASX.C.......:
Published Object Name         : 2MASX J20192373-5833052       
Frequency Targeted            : K_s (2MASS isophotal)         
Major Axis (2a)               : a = 30.5       arcsec               2a = 61.00 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : ...                                 2b = 14.64 arcsec
Uncertainty                   : ...                                 ...
Axis Ratio                    : b/a = 0.240                         b/a = 0.24
Uncertainty                   : ...                                 ...
Ellipticity                   : ...                                 1 - b/a = 0.76
Uncertainty                   : ...                                 ...
Eccentricity                  : ...                                 [(a/b)2-1]/[(a/b)2+1] = 0.89
Uncertainty                   : ...                                 ...
Cos-1(b/a)                    : ...                                 76 deg
Position Angle [Equinox]      :  -25   deg [J2000]                  155 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          : 304.848724      -58.551479    (J2000)
Qualifiers                    : From new, raw data
NED Comment                   :                                         

No. 2 Published Units: Homogenized Units: Reference Code : 20032MASX.C.......: Published Object Name : 2MASX J20192373-5833052 Frequency Targeted : K_s (2MASS "total") Major Axis (2a) : a = 46.2 arcsec 2a = 92.30 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 22.15 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.240 b/a = 0.24 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.76 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.89 Uncertainty : ... ... Cos-1(b/a) : ... 76 deg Position Angle [Equinox] : -25 deg [J2000] 155 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 : 304.848724 -58.551479 (J2000) Qualifiers : From new, raw data NED Comment :
No. 3 Published Units: Homogenized Units: Reference Code : 1982ESOU..C...0000L Published Object Name : ESO 143- G 019 Frequency Targeted : ESO-Uppsala "Quick Blue" IIa-O Major Axis (2a) : 1.20 arcmin 2a = 72.00 arcsec Uncertainty : ... ... Minor Axis (2b) : 2b = 0.30 arcmin 2b = 18.00 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.25 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.75 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.88 Uncertainty : ... ... Cos-1(b/a) : ... 76 deg Position Angle [Equinox] : 154 deg [B1950] 154 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 : 201519. -584230. (B1950) Qualifiers : From new, raw data NED Comment :
No. 4 Published Units: Homogenized Units: Reference Code : 1989ESOLV.C...0000L Published Object Name : ESO-LV 1430190 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 70.79 arcsec 2a = 70.79 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 283.16 arcsec Uncertainty : ... ... Axis Ratio : a/b = 4.00 b/a = 0.25 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.75 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.88 Uncertainty : ... ... Cos-1(b/a) : ... 76 deg Position Angle [Equinox] : 154.00 deg [B1950] 154 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 : 303.829163 -58.708332 (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 1430190 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 86.10 arcsec 2a = 86.10 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 344.40 arcsec Uncertainty : ... ... Axis Ratio : a/b = 4.00 b/a = 0.25 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.75 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.88 Uncertainty : ... ... Cos-1(b/a) : ... 76 deg Position Angle [Equinox] : 154.00 deg [B1950] 154 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 : 303.829163 -58.708332 (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 1430190 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 105.93 arcsec 2a = 105.93 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 423.72 arcsec Uncertainty : ... ... Axis Ratio : a/b = 4.00 b/a = 0.25 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.75 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.88 Uncertainty : ... ... Cos-1(b/a) : ... 76 deg Position Angle [Equinox] : 154.00 deg [B1950] 154 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 : 303.829163 -58.708332 (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 1430190 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 44.67 arcsec 2a = 44.67 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 178.68 arcsec Uncertainty : ... ... Axis Ratio : a/b = 4.00 b/a = 0.25 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.75 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.88 Uncertainty : ... ... Cos-1(b/a) : ... 76 deg Position Angle [Equinox] : 154.00 deg [B1950] 154 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 : 303.829163 -58.708332 (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 1430190 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 53.70 arcsec 2a = 53.70 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 214.80 arcsec Uncertainty : ... ... Axis Ratio : a/b = 4.00 b/a = 0.25 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.75 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.88 Uncertainty : ... ... Cos-1(b/a) : ... 76 deg Position Angle [Equinox] : 154.00 deg [B1950] 154 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 : 303.829163 -58.708332 (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 1430190 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 69.98 arcsec 2a = 69.98 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 279.92 arcsec Uncertainty : ... ... Axis Ratio : a/b = 4.00 b/a = 0.25 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.75 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.88 Uncertainty : ... ... Cos-1(b/a) : ... 76 deg Position Angle [Equinox] : 154.00 deg [B1950] 154 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 : 303.829163 -58.708332 (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 1430190 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 33.11 arcsec 2a = 33.11 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 132.44 arcsec Uncertainty : ... ... Axis Ratio : a/b = 4.00 b/a = 0.25 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.75 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.88 Uncertainty : ... ... Cos-1(b/a) : ... 76 deg Position Angle [Equinox] : 154.00 deg [B1950] 154 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 : 303.829163 -58.708332 (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 1430190 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 21.13 arcsec 2a = 21.13 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 : 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 : 303.829163 -58.708332 (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 1430190 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 12.99 arcsec 2a = 12.99 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 : 303.829163 -58.708332 (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 1430190 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 16.05 arcsec 2a = 16.05 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 59.89 arcsec Uncertainty : ... ... Axis Ratio : a/b = 3.73 b/a = 0.27 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.73 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.87 Uncertainty : ... ... Cos-1(b/a) : ... 74 deg Position Angle [Equinox] : 155.05 deg [B1950] 155 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 : 303.829163 -58.708332 (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 1430190 Frequency Targeted : ESO-LV IIIa-F Major Axis (2a) : 16.52 arcsec 2a = 16.52 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 : 303.829163 -58.708332 (B1950) Qualifiers : From new, raw data; Corrected for contaminating sources NED Comment : From fits to surf. brightness in octants

Back to NED Home