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Date and Time of the Query: 2022-01-19 T04:04:25 PST
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Diameter data point(s) for object NGC 3275A

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 ... ... 0.620 (b/a) ... ... ... 10
[J2000]
20.0 K-mag arcsec^-2^ 1.38E+14 32.00 ... 0.62 0.38 0.44 52 10
[J2000]
2 K_s (2MASS "total")
20032MASX.C.......:
39.2 (a) arcsec ... ... 0.620 (b/a) ... ... ... 10
[J2000]
Diameter for "total" magnitude 1.38E+14 78.40 ... 0.62 0.38 0.44 52 10
[J2000]
3 ESO-Uppsala "Quick Blue" IIa-O
1982ESOU..C...0000L
1.20 arcmin 0.30 arcmin ... ... ... ... 15
[B1950]
About 25.5 B-mag arcsec^-2^ 6.81E+14 72.00 ... 0.25 0.75 0.88 76 15
[J2000]
4 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
69.98 arcsec ... ... 4.00 (a/b) ... ... ... 15.00
[B1950]
25.0 B-mag arcsec^-2^ 6.81E+14 69.98 ... 0.25 0.75 0.88 76 15
[J2000]
5 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
84.14 arcsec ... ... 4.00 (a/b) ... ... ... 15.00
[B1950]
26.0 B-mag arcsec^-2^ 6.81E+14 84.14 ... 0.25 0.75 0.88 76 15
[J2000]
6 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
114.82 arcsec ... ... 4.00 (a/b) ... ... ... 15.00
[B1950]
27.0 B-mag arcsec^-2^ 6.81E+14 114.82 ... 0.25 0.75 0.88 76 15
[J2000]
7 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
50.70 arcsec ... ... 4.00 (a/b) ... ... ... 15.00
[B1950]
70% total B light 6.81E+14 50.70 ... 0.25 0.75 0.88 76 15
[J2000]
8 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
63.10 arcsec ... ... 4.00 (a/b) ... ... ... 15.00
[B1950]
80% total B light 6.81E+14 63.10 ... 0.25 0.75 0.88 76 15
[J2000]
9 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
120.23 arcsec ... ... 4.00 (a/b) ... ... ... 15.00
[B1950]
90% total B light 6.81E+14 120.23 ... 0.25 0.75 0.88 76 15
[J2000]
10 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
32.36 arcsec ... ... 4.00 (a/b) ... ... ... 15.00
[B1950]
50% total B light, major dia. 6.81E+14 32.36 ... 0.25 0.75 0.88 76 15
[J2000]
11 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
18.62 arcsec ... ... ... ... ... ... ... 50% total B light, aperture 6.81E+14 18.62 ... ... ... ... ... ...
12 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
14.31 arcsec ... ... ... ... ... ... ... B disk exp. scale length 6.81E+14 14.31 ... ... ... ... ... ...
13 ESO-LV "Quick Blue" IIa-O
1989ESOLV.C...0000L
0.26 arcsec ... ... 2.81 (a/b) ... ... ... 21.00
[B1950]
B exponential scale length 6.81E+14 0.26 ... 0.36 0.64 0.78 69 21
[J2000]
14 ESO-LV IIIa-F
1989ESOLV.C...0000L
0.07 arcsec ... ... ... ... ... ... ... R exponential scale length 4.68E+14 0.07 ... ... ... ... ... ...


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 20032MASX.C.......:
Published Object Name         : 2MASX J10300420-3641387       
Frequency Targeted            : K_s (2MASS isophotal)         
Major Axis (2a)               : a = 16.0       arcsec               2a = 32.00 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : ...                                 2b = 19.84 arcsec
Uncertainty                   : ...                                 ...
Axis Ratio                    : b/a = 0.620                         b/a = 0.62
Uncertainty                   : ...                                 ...
Ellipticity                   : ...                                 1 - b/a = 0.38
Uncertainty                   : ...                                 ...
Eccentricity                  : ...                                 [(a/b)2-1]/[(a/b)2+1] = 0.44
Uncertainty                   : ...                                 ...
Cos-1(b/a)                    : ...                                 52 deg
Position Angle [Equinox]      :   10   deg [J2000]                  10 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          : 157.517578      -36.694088    (J2000)
Qualifiers                    : From new, raw data
NED Comment                   :                                         

No. 2 Published Units: Homogenized Units: Reference Code : 20032MASX.C.......: Published Object Name : 2MASX J10300420-3641387 Frequency Targeted : K_s (2MASS "total") Major Axis (2a) : a = 39.2 arcsec 2a = 78.40 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 48.61 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.620 b/a = 0.62 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.38 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.44 Uncertainty : ... ... Cos-1(b/a) : ... 52 deg Position Angle [Equinox] : 10 deg [J2000] 10 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 : 157.517578 -36.694088 (J2000) Qualifiers : From new, raw data NED Comment :
No. 3 Published Units: Homogenized Units: Reference Code : 1982ESOU..C...0000L Published Object Name : ESO 375- G 046 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] : 15 deg [B1950] 15 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 : 102750. -362612. (B1950) Qualifiers : From new, raw data NED Comment :
No. 4 Published Units: Homogenized Units: Reference Code : 1989ESOLV.C...0000L Published Object Name : ESO-LV 3750460 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] : 15.00 deg [B1950] 15 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 : 156.958328 -36.436668 (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 3750460 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 84.14 arcsec 2a = 84.14 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 336.56 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] : 15.00 deg [B1950] 15 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 : 156.958328 -36.436668 (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 3750460 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 114.82 arcsec 2a = 114.82 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 459.28 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] : 15.00 deg [B1950] 15 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 : 156.958328 -36.436668 (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 3750460 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 50.70 arcsec 2a = 50.70 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 202.80 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] : 15.00 deg [B1950] 15 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 : 156.958328 -36.436668 (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 3750460 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 63.10 arcsec 2a = 63.10 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 252.40 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] : 15.00 deg [B1950] 15 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 : 156.958328 -36.436668 (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 3750460 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 120.23 arcsec 2a = 120.23 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 480.92 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] : 15.00 deg [B1950] 15 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 : 156.958328 -36.436668 (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 3750460 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 32.36 arcsec 2a = 32.36 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 129.44 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] : 15.00 deg [B1950] 15 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 : 156.958328 -36.436668 (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 3750460 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 18.62 arcsec 2a = 18.62 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 : 156.958328 -36.436668 (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 3750460 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 14.31 arcsec 2a = 14.31 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 : 156.958328 -36.436668 (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 3750460 Frequency Targeted : ESO-LV "Quick Blue" IIa-O Major Axis (2a) : 0.26 arcsec 2a = 0.26 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 0.73 arcsec Uncertainty : ... ... Axis Ratio : a/b = 2.81 b/a = 0.36 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.64 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.78 Uncertainty : ... ... Cos-1(b/a) : ... 69 deg Position Angle [Equinox] : 21.00 deg [B1950] 21 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 : 156.958328 -36.436668 (B1950) Qualifiers : From new, raw data; Corrected for contaminating sources NED Comment : Derived scale length < 2" mean ESO-B PSF
No. 14 Published Units: Homogenized Units: Reference Code : 1989ESOLV.C...0000L Published Object Name : ESO-LV 3750460 Frequency Targeted : ESO-LV IIIa-F Major Axis (2a) : 0.07 arcsec 2a = 0.07 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 : 156.958328 -36.436668 (B1950) Qualifiers : From new, raw data; Corrected for contaminating sources NED Comment : Derived scale length < 2" mean ESO-B PSF

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