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Date and Time of the Query: 2019-08-21 T18:54:28 PDT
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Diameter data point(s) for object NGC 6845B

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.......:
14.4 (a) arcsec ... ... 0.780 (b/a) ... ... ... 15
[J2000]
20.0 K-mag arcsec^-2^ 1.38E+14 28.80 ... 0.78 0.22 0.24 39 15
[J2000]
2 K_s (2MASS "total")
20032MASX.C.......:
29.0 (a) arcsec ... ... 0.780 (b/a) ... ... ... 15
[J2000]
Diameter for "total" magnitude 1.38E+14 58.00 ... 0.78 0.22 0.24 39 15
[J2000]
3 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
38.02 arcsec ... ... 3.00 (a/b) ... ... ... 54.58
[B1950]
25.0 B-mag arcsec^-2^ 6.81E+14 38.02 ... 0.33 0.67 0.80 71 54
[J2000]
4 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
53.09 arcsec ... ... 3.00 (a/b) ... ... ... 54.58
[B1950]
26.0 B-mag arcsec^-2^ 6.81E+14 53.09 ... 0.33 0.67 0.80 71 54
[J2000]
5 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
33.88 arcsec ... ... 3.00 (a/b) ... ... ... 54.58
[B1950]
70% total B light 6.81E+14 33.88 ... 0.33 0.67 0.80 71 54
[J2000]
6 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
40.27 arcsec ... ... 3.00 (a/b) ... ... ... 54.58
[B1950]
80% total B light 6.81E+14 40.27 ... 0.33 0.67 0.80 71 54
[J2000]
7 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
49.55 arcsec ... ... 3.00 (a/b) ... ... ... 54.58
[B1950]
90% total B light 6.81E+14 49.55 ... 0.33 0.67 0.80 71 54
[J2000]
8 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
24.27 arcsec ... ... 3.00 (a/b) ... ... ... 54.58
[B1950]
50% total B light, major dia. 6.81E+14 24.27 ... 0.33 0.67 0.80 71 54
[J2000]
9 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
165.96 arcsec ... ... ... ... ... ... ... 50% total B light, aperture 6.81E+14 165.96 ... ... ... ... ... ...
10 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
26.15 arcsec ... ... 3.00 (a/b) ... ... ... 54.58
[B1950]
B exponential scale length 6.81E+14 26.15 ... 0.33 0.67 0.80 71 54
[J2000]
11 ESO-LV IIIa-F
1989ESOLV.C...0000L
26.15 arcsec ... ... ... ... ... ... ... R exponential scale length 4.68E+14 26.15 ... ... ... ... ... ...
12 RC3 D_25, R_25 (blue)
1991RC3.9.C...0000d
1.04 log(2a) + 1 ... ... 0.24
log(a/b)
0.09 ... ... ... 25.0 B-mag arcsec^-2^ 6.81E+14 65.80 15.10 0.57 0.43 0.50 55 ...
13 RC3 D_0 (blue)
1991RC3.9.C...0000d
1.05 log(2a) + 1 ... ... ... ... ... ... ... 25.0 B-mag arcsec^-2^ 6.81E+14 67.30 ... ... ... ... ... ...


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 20032MASX.C.......:
Published Object Name         : 2MASX J20010526-4703340       
Frequency Targeted            : K_s (2MASS isophotal)         
Major Axis (2a)               : a = 14.4       arcsec               2a = 28.80 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : ...                                 2b = 22.46 arcsec
Uncertainty                   : ...                                 ...
Axis Ratio                    : b/a = 0.780                         b/a = 0.78
Uncertainty                   : ...                                 ...
Ellipticity                   : ...                                 1 - b/a = 0.22
Uncertainty                   : ...                                 ...
Eccentricity                  : ...                                 [(a/b)2-1]/[(a/b)2+1] = 0.24
Uncertainty                   : ...                                 ...
Cos-1(b/a)                    : ...                                 39 deg
Position Angle [Equinox]      :   15   deg [J2000]                  15 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          : 300.271912      -47.059441    (J2000)
Qualifiers                    : From new, raw data
NED Comment                   :                                         

No. 2 Published Units: Homogenized Units: Reference Code : 20032MASX.C.......: Published Object Name : 2MASX J20010526-4703340 Frequency Targeted : K_s (2MASS "total") Major Axis (2a) : a = 29.0 arcsec 2a = 58.00 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 45.24 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.780 b/a = 0.78 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.22 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.24 Uncertainty : ... ... Cos-1(b/a) : ... 39 deg Position Angle [Equinox] : 15 deg [J2000] 15 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 : 300.271912 -47.059441 (J2000) Qualifiers : From new, raw data NED Comment :
No. 3 Published Units: Homogenized Units: Reference Code : 1989ESOLV.C...0000L Published Object Name : ESO-LV 2840082 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 38.02 arcsec 2a = 38.02 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 114.17 arcsec Uncertainty : ... ... Axis Ratio : a/b = 3.00 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] : 54.58 deg [B1950] 54 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 : 299.371094 -47.197536 (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 2840082 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 53.09 arcsec 2a = 53.09 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 159.43 arcsec Uncertainty : ... ... Axis Ratio : a/b = 3.00 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] : 54.58 deg [B1950] 54 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 : 299.371094 -47.197536 (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 2840082 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 33.88 arcsec 2a = 33.88 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 101.74 arcsec Uncertainty : ... ... Axis Ratio : a/b = 3.00 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] : 54.58 deg [B1950] 54 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 : 299.371094 -47.197536 (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 2840082 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 40.27 arcsec 2a = 40.27 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 120.93 arcsec Uncertainty : ... ... Axis Ratio : a/b = 3.00 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] : 54.58 deg [B1950] 54 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 : 299.371094 -47.197536 (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 2840082 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 49.55 arcsec 2a = 49.55 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 148.80 arcsec Uncertainty : ... ... Axis Ratio : a/b = 3.00 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] : 54.58 deg [B1950] 54 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 : 299.371094 -47.197536 (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 2840082 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 24.27 arcsec 2a = 24.27 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 72.88 arcsec Uncertainty : ... ... Axis Ratio : a/b = 3.00 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] : 54.58 deg [B1950] 54 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 : 299.371094 -47.197536 (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 2840082 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 165.96 arcsec 2a = 165.96 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 : 299.371094 -47.197536 (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 2840082 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 26.15 arcsec 2a = 26.15 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 78.53 arcsec Uncertainty : ... ... Axis Ratio : a/b = 3.00 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] : 54.58 deg [B1950] 54 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 : 299.371094 -47.197536 (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 2840082 Frequency Targeted : ESO-LV IIIa-F Major Axis (2a) : 26.15 arcsec 2a = 26.15 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 : 299.371094 -47.197536 (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 : 1991RC3.9.C...0000d Published Object Name : ESO 284-IG 008 NED02 Frequency Targeted : RC3 D_25, R_25 (blue) Major Axis (2a) : log(2a) + 1 = 1.04 2a = 65.80 arcsec Uncertainty : 0.09 15.10 arcsec Minor Axis (2b) : ... 2b = 37.83 arcsec Uncertainty : ... ... Axis Ratio : log(a/b) = 0.24 b/a = 0.57 Uncertainty : 0.08 0.12 Ellipticity : ... 1 - b/a = 0.43 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.50 Uncertainty : ... ... Cos-1(b/a) : ... 55 deg Position Angle [Equinox] : ... ... 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 : 200105.9 -470335. (J2000) Qualifiers : Homogenized from previously published data NED Comment :
No. 13 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : ESO 284-IG 008 NED02 Frequency Targeted : RC3 D_0 (blue) Major Axis (2a) : log(2a) + 1 = 1.05 2a = 67.30 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 : 200105.9 -470335. (J2000) Qualifiers : Homogenized from previously published data NED Comment : Extinction and inclination corrected.

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