NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-06-18 T21:28:44 PDT
Help | Comment | NED Home

Diameter data point(s) for object NGC 6845C

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.......:
29.7 (a) arcsec ... ... 0.260 (b/a) ... ... ... -35
[J2000]
20.0 K-mag arcsec^-2^ 1.38E+14 59.40 ... 0.26 0.74 0.87 75 145
[J2000]
2 K_s (2MASS "total")
20032MASX.C.......:
59.7 (a) arcsec ... ... 0.260 (b/a) ... ... ... -35
[J2000]
Diameter for "total" magnitude 1.38E+14 119.50 ... 0.26 0.74 0.87 75 145
[J2000]
3 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
47.86 arcsec ... ... 1.35 (a/b) ... ... ... 63.60
[B1950]
25.0 B-mag arcsec^-2^ 6.81E+14 47.86 ... 0.74 0.26 0.29 42 63
[J2000]
4 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
56.89 arcsec ... ... 1.35 (a/b) ... ... ... 63.60
[B1950]
26.0 B-mag arcsec^-2^ 6.81E+14 56.89 ... 0.74 0.26 0.29 42 63
[J2000]
5 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
63.10 arcsec ... ... 1.35 (a/b) ... ... ... 63.60
[B1950]
27.0 B-mag arcsec^-2^ 6.81E+14 63.10 ... 0.74 0.26 0.29 42 63
[J2000]
6 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
22.13 arcsec ... ... 1.35 (a/b) ... ... ... 63.60
[B1950]
70% total B light 6.81E+14 22.13 ... 0.74 0.26 0.29 42 63
[J2000]
7 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
27.54 arcsec ... ... 1.35 (a/b) ... ... ... 63.60
[B1950]
80% total B light 6.81E+14 27.54 ... 0.74 0.26 0.29 42 63
[J2000]
8 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
35.89 arcsec ... ... 1.35 (a/b) ... ... ... 63.60
[B1950]
90% total B light 6.81E+14 35.89 ... 0.74 0.26 0.29 42 63
[J2000]
9 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
15.31 arcsec ... ... 1.35 (a/b) ... ... ... 63.60
[B1950]
50% total B light, major dia. 6.81E+14 15.31 ... 0.74 0.26 0.29 42 63
[J2000]
10 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
105.93 arcsec ... ... ... ... ... ... ... 50% total B light, aperture 6.81E+14 105.93 ... ... ... ... ... ...
11 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
3.87 arcsec ... ... 1.35 (a/b) ... ... ... 63.60
[B1950]
B exponential scale length 6.81E+14 3.87 ... 0.74 0.26 0.29 42 63
[J2000]
12 ESO-LV IIIa-F
1989ESOLV.C...0000L
3.87 arcsec ... ... ... ... ... ... ... R exponential scale length 4.68E+14 3.87 ... ... ... ... ... ...
13 RC3 D_25, R_25 (blue)
1991RC3.9.C...0000d
0.81 log(2a) + 1 ... ... 0.49
log(a/b)
0.06 ... ... ... 25.0 B-mag arcsec^-2^ 6.81E+14 38.70 5.70 0.32 0.68 0.81 71 ...
14 RC3 D_0 (blue)
1991RC3.9.C...0000d
0.76 log(2a) + 1 ... ... ... ... ... ... ... 25.0 B-mag arcsec^-2^ 6.81E+14 34.50 ... ... ... ... ... ...


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 20032MASX.C.......:
Published Object Name         : 2MASX J20005684-4705040       
Frequency Targeted            : K_s (2MASS isophotal)         
Major Axis (2a)               : a = 29.7       arcsec               2a = 59.40 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : ...                                 2b = 15.44 arcsec
Uncertainty                   : ...                                 ...
Axis Ratio                    : b/a = 0.260                         b/a = 0.26
Uncertainty                   : ...                                 ...
Ellipticity                   : ...                                 1 - b/a = 0.74
Uncertainty                   : ...                                 ...
Eccentricity                  : ...                                 [(a/b)2-1]/[(a/b)2+1] = 0.87
Uncertainty                   : ...                                 ...
Cos-1(b/a)                    : ...                                 75 deg
Position Angle [Equinox]      :  -35   deg [J2000]                  145 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          : 300.236816      -47.084404    (J2000)
Qualifiers                    : From new, raw data
NED Comment                   :                                         

No. 2 Published Units: Homogenized Units: Reference Code : 20032MASX.C.......: Published Object Name : 2MASX J20005684-4705040 Frequency Targeted : K_s (2MASS "total") Major Axis (2a) : a = 59.7 arcsec 2a = 119.50 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 31.07 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.260 b/a = 0.26 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.74 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.87 Uncertainty : ... ... Cos-1(b/a) : ... 75 deg Position Angle [Equinox] : -35 deg [J2000] 145 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 : 300.236816 -47.084404 (J2000) Qualifiers : From new, raw data NED Comment :
No. 3 Published Units: Homogenized Units: Reference Code : 1989ESOLV.C...0000L Published Object Name : ESO-LV 2840081 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 47.86 arcsec 2a = 47.86 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 64.50 arcsec Uncertainty : ... ... Axis Ratio : a/b = 1.35 b/a = 0.74 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.26 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.29 Uncertainty : ... ... Cos-1(b/a) : ... 42 deg Position Angle [Equinox] : 63.60 deg [B1950] 63 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 : 299.335663 -47.222656 (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 2840081 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 56.89 arcsec 2a = 56.89 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 76.67 arcsec Uncertainty : ... ... Axis Ratio : a/b = 1.35 b/a = 0.74 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.26 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.29 Uncertainty : ... ... Cos-1(b/a) : ... 42 deg Position Angle [Equinox] : 63.60 deg [B1950] 63 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 : 299.335663 -47.222656 (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 2840081 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 63.10 arcsec 2a = 63.10 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 85.04 arcsec Uncertainty : ... ... Axis Ratio : a/b = 1.35 b/a = 0.74 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.26 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.29 Uncertainty : ... ... Cos-1(b/a) : ... 42 deg Position Angle [Equinox] : 63.60 deg [B1950] 63 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 : 299.335663 -47.222656 (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 2840081 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 22.13 arcsec 2a = 22.13 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 29.82 arcsec Uncertainty : ... ... Axis Ratio : a/b = 1.35 b/a = 0.74 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.26 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.29 Uncertainty : ... ... Cos-1(b/a) : ... 42 deg Position Angle [Equinox] : 63.60 deg [B1950] 63 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 : 299.335663 -47.222656 (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 2840081 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 27.54 arcsec 2a = 27.54 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 37.12 arcsec Uncertainty : ... ... Axis Ratio : a/b = 1.35 b/a = 0.74 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.26 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.29 Uncertainty : ... ... Cos-1(b/a) : ... 42 deg Position Angle [Equinox] : 63.60 deg [B1950] 63 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 : 299.335663 -47.222656 (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 2840081 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 35.89 arcsec 2a = 35.89 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 48.37 arcsec Uncertainty : ... ... Axis Ratio : a/b = 1.35 b/a = 0.74 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.26 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.29 Uncertainty : ... ... Cos-1(b/a) : ... 42 deg Position Angle [Equinox] : 63.60 deg [B1950] 63 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 : 299.335663 -47.222656 (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 2840081 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 15.31 arcsec 2a = 15.31 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 20.63 arcsec Uncertainty : ... ... Axis Ratio : a/b = 1.35 b/a = 0.74 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.26 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.29 Uncertainty : ... ... Cos-1(b/a) : ... 42 deg Position Angle [Equinox] : 63.60 deg [B1950] 63 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 : 299.335663 -47.222656 (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 2840081 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 105.93 arcsec 2a = 105.93 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 : 299.335663 -47.222656 (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 2840081 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 3.87 arcsec 2a = 3.87 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 5.22 arcsec Uncertainty : ... ... Axis Ratio : a/b = 1.35 b/a = 0.74 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.26 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.29 Uncertainty : ... ... Cos-1(b/a) : ... 42 deg Position Angle [Equinox] : 63.60 deg [B1950] 63 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 : 299.335663 -47.222656 (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 2840081 Frequency Targeted : ESO-LV IIIa-F Major Axis (2a) : 3.87 arcsec 2a = 3.87 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 : 299.335663 -47.222656 (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 : 1991RC3.9.C...0000d Published Object Name : ESO 284-IG 008 NED03 Frequency Targeted : RC3 D_25, R_25 (blue) Major Axis (2a) : log(2a) + 1 = 0.81 2a = 38.70 arcsec Uncertainty : 0.06 5.70 arcsec Minor Axis (2b) : ... 2b = 12.54 arcsec Uncertainty : ... ... Axis Ratio : log(a/b) = 0.49 b/a = 0.32 Uncertainty : 0.05 0.04 Ellipticity : ... 1 - b/a = 0.68 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.81 Uncertainty : ... ... Cos-1(b/a) : ... 71 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 : 200056.6 -470502. (J2000) Qualifiers : Homogenized from previously published data NED Comment :
No. 14 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : ESO 284-IG 008 NED03 Frequency Targeted : RC3 D_0 (blue) Major Axis (2a) : log(2a) + 1 = 0.76 2a = 34.50 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 : 200056.6 -470502. (J2000) Qualifiers : Homogenized from previously published data NED Comment : Extinction and inclination corrected.

Back to NED Home