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Date and Time of the Query: 2019-04-26 T07:41:59 PDT
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Diameter data point(s) for object NGC 2115A

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.......:
16.0 (a) arcsec ... ... 0.660 (b/a) ... ... ... 45
[J2000]
20.0 K-mag arcsec^-2^ 1.38E+14 32.00 ... 0.66 0.34 0.39 49 45
[J2000]
2 K_s (2MASS "total")
20032MASX.C.......:
28.2 (a) arcsec ... ... 0.660 (b/a) ... ... ... 45
[J2000]
Diameter for "total" magnitude 1.38E+14 56.40 ... 0.66 0.34 0.39 49 45
[J2000]
3 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
73.28 arcsec ... ... 1.10 (a/b) ... ... ... 60.43
[B1950]
25.0 B-mag arcsec^-2^ 6.81E+14 73.28 ... 0.91 0.09 0.09 24 61
[J2000]
4 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
117.49 arcsec ... ... 1.10 (a/b) ... ... ... 60.43
[B1950]
26.0 B-mag arcsec^-2^ 6.81E+14 117.49 ... 0.91 0.09 0.09 24 61
[J2000]
5 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
138.04 arcsec ... ... 1.10 (a/b) ... ... ... 60.43
[B1950]
27.0 B-mag arcsec^-2^ 6.81E+14 138.04 ... 0.91 0.09 0.09 24 61
[J2000]
6 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
60.95 arcsec ... ... 1.10 (a/b) ... ... ... 60.43
[B1950]
70% total B light 6.81E+14 60.95 ... 0.91 0.09 0.09 24 61
[J2000]
7 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
82.22 arcsec ... ... 1.10 (a/b) ... ... ... 60.43
[B1950]
80% total B light 6.81E+14 82.22 ... 0.91 0.09 0.09 24 61
[J2000]
8 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
105.93 arcsec ... ... 1.10 (a/b) ... ... ... 60.43
[B1950]
90% total B light 6.81E+14 105.93 ... 0.91 0.09 0.09 24 61
[J2000]
9 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
17.58 arcsec ... ... 1.10 (a/b) ... ... ... 60.43
[B1950]
50% total B light, major dia. 6.81E+14 17.58 ... 0.91 0.09 0.09 24 61
[J2000]
10 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
16.98 arcsec ... ... ... ... ... ... ... 50% total B light, aperture 6.81E+14 16.98 ... ... ... ... ... ...
11 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
6.46 arcsec ... ... ... ... ... ... ... B disk exp. scale length 6.81E+14 6.46 ... ... ... ... ... ...
12 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
0.03 arcsec ... ... 1.10 (a/b) ... ... ... 60.43
[B1950]
B exponential scale length 6.81E+14 0.03 ... 0.91 0.09 0.09 24 61
[J2000]
13 ESO-LV IIIa-F
1989ESOLV.C...0000L
0.01 arcsec ... ... ... ... ... ... ... R exponential scale length 4.68E+14 0.01 ... ... ... ... ... ...


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 20032MASX.C.......:
Published Object Name         : 2MASX J05511983-5034582       
Frequency Targeted            : K_s (2MASS isophotal)         
Major Axis (2a)               : a = 16.0       arcsec               2a = 32.00 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : ...                                 2b = 21.12 arcsec
Uncertainty                   : ...                                 ...
Axis Ratio                    : b/a = 0.660                         b/a = 0.66
Uncertainty                   : ...                                 ...
Ellipticity                   : ...                                 1 - b/a = 0.34
Uncertainty                   : ...                                 ...
Eccentricity                  : ...                                 [(a/b)2-1]/[(a/b)2+1] = 0.39
Uncertainty                   : ...                                 ...
Cos-1(b/a)                    : ...                                 49 deg
Position Angle [Equinox]      :   45   deg [J2000]                  45 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          : 87.832596       -50.582867    (J2000)
Qualifiers                    : From new, raw data
NED Comment                   :                                         

No. 2 Published Units: Homogenized Units: Reference Code : 20032MASX.C.......: Published Object Name : 2MASX J05511983-5034582 Frequency Targeted : K_s (2MASS "total") Major Axis (2a) : a = 28.2 arcsec 2a = 56.40 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 37.22 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.660 b/a = 0.66 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.34 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.39 Uncertainty : ... ... Cos-1(b/a) : ... 49 deg Position Angle [Equinox] : 45 deg [J2000] 45 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 : 87.832596 -50.582867 (J2000) Qualifiers : From new, raw data NED Comment :
No. 3 Published Units: Homogenized Units: Reference Code : 1989ESOLV.C...0000L Published Object Name : ESO-LV 2050060 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 73.28 arcsec 2a = 73.28 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 80.44 arcsec Uncertainty : ... ... Axis Ratio : a/b = 1.10 b/a = 0.91 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.09 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.09 Uncertainty : ... ... Cos-1(b/a) : ... 24 deg Position Angle [Equinox] : 60.43 deg [B1950] 61 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 : 87.529167 -50.595001 (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 2050060 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 117.49 arcsec 2a = 117.49 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 128.97 arcsec Uncertainty : ... ... Axis Ratio : a/b = 1.10 b/a = 0.91 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.09 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.09 Uncertainty : ... ... Cos-1(b/a) : ... 24 deg Position Angle [Equinox] : 60.43 deg [B1950] 61 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 : 87.529167 -50.595001 (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 2050060 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 138.04 arcsec 2a = 138.04 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 151.53 arcsec Uncertainty : ... ... Axis Ratio : a/b = 1.10 b/a = 0.91 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.09 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.09 Uncertainty : ... ... Cos-1(b/a) : ... 24 deg Position Angle [Equinox] : 60.43 deg [B1950] 61 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 : 87.529167 -50.595001 (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 2050060 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 60.95 arcsec 2a = 60.95 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 66.90 arcsec Uncertainty : ... ... Axis Ratio : a/b = 1.10 b/a = 0.91 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.09 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.09 Uncertainty : ... ... Cos-1(b/a) : ... 24 deg Position Angle [Equinox] : 60.43 deg [B1950] 61 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 : 87.529167 -50.595001 (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 2050060 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 82.22 arcsec 2a = 82.22 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 90.25 arcsec Uncertainty : ... ... Axis Ratio : a/b = 1.10 b/a = 0.91 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.09 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.09 Uncertainty : ... ... Cos-1(b/a) : ... 24 deg Position Angle [Equinox] : 60.43 deg [B1950] 61 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 : 87.529167 -50.595001 (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 2050060 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 105.93 arcsec 2a = 105.93 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 116.28 arcsec Uncertainty : ... ... Axis Ratio : a/b = 1.10 b/a = 0.91 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.09 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.09 Uncertainty : ... ... Cos-1(b/a) : ... 24 deg Position Angle [Equinox] : 60.43 deg [B1950] 61 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 : 87.529167 -50.595001 (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 2050060 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 17.58 arcsec 2a = 17.58 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 19.30 arcsec Uncertainty : ... ... Axis Ratio : a/b = 1.10 b/a = 0.91 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.09 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.09 Uncertainty : ... ... Cos-1(b/a) : ... 24 deg Position Angle [Equinox] : 60.43 deg [B1950] 61 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 : 87.529167 -50.595001 (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 2050060 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 16.98 arcsec 2a = 16.98 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 : 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 : 87.529167 -50.595001 (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 2050060 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 6.46 arcsec 2a = 6.46 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 : 87.529167 -50.595001 (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 2050060 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 0.03 arcsec 2a = 0.03 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 0.03 arcsec Uncertainty : ... ... Axis Ratio : a/b = 1.10 b/a = 0.91 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.09 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.09 Uncertainty : ... ... Cos-1(b/a) : ... 24 deg Position Angle [Equinox] : 60.43 deg [B1950] 61 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 : 87.529167 -50.595001 (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 2050060 Frequency Targeted : ESO-LV IIIa-F Major Axis (2a) : 0.01 arcsec 2a = 0.01 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 : 87.529167 -50.595001 (B1950) Qualifiers : From new, raw data; Corrected for contaminating sources NED Comment : Derived scale length < 2" mean ESO-B PSF

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