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Date and Time of the Query: 2019-04-20 T13:47:18 PDT
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Diameter data point(s) for object NGC 1012

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 POSS1 103a-O
1973UGC...C...0000N
2.90 arcmin 1.50 arcmin ... ... ... ... 24
[B1950]
About 25.0 B-mag arcsec^-2^ 7.40E+14 174.00 ... 0.52 0.48 0.58 59 24
[J2000]
2 K_s (2MASS isophotal)
20032MASX.C.......:
54.2 (a) arcsec ... ... 0.400 (b/a) ... ... ... 20
[J2000]
20.0 K-mag arcsec^-2^ 1.38E+14 108.40 ... 0.40 0.60 0.72 66 20
[J2000]
3 K_s (2MASS "total")
20032MASX.C.......:
76.9 (a) arcsec ... ... 0.400 (b/a) ... ... ... 20
[J2000]
Diameter for "total" magnitude 1.38E+14 153.80 ... 0.40 0.60 0.72 66 20
[J2000]
4 POSS1 103a-O
1964MCG2..C...0000V
0.70 arcmin 0.40 arcmin ... ... ... ... ... Very high surface brightness 7.40E+14 42.00 ... 0.57 0.43 0.51 55 ...
5 POSS1 103a-O
1964MCG2..C...0000V
2.20 arcmin 0.70 arcmin ... ... ... ... ... Intermed. surface brightness 7.40E+14 132.00 ... 0.32 0.68 0.82 71 ...
6 RC3 D_25, R_25 (blue)
1991RC3.9.C...0000d
1.40 log(2a) + 1 ... ... 0.36
log(a/b)
0.04 ... ... 24
[J2000]
25.0 B-mag arcsec^-2^ 6.81E+14 150.70 14.50 0.44 0.56 0.68 64 24
[J2000]
7 RC3 D_0 (blue)
1991RC3.9.C...0000d
1.43 log(2a) + 1 ... ... ... ... ... ... ... 25.0 B-mag arcsec^-2^ 6.81E+14 161.50 ... ... ... ... ... ...


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 1973UGC...C...0000N
Published Object Name         : UGC 02141                     
Frequency Targeted            : POSS1 103a-O                  
Major Axis (2a)               : 2.90       arcmin                   2a = 174.00 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : 2b =  1.50      arcmin              2b = 90.00 arcsec 
Uncertainty                   : ...                                 ...
Axis Ratio                    : ...                                 b/a = 0.52
Uncertainty                   : ...                                 ...
Ellipticity                   : ...                                 1 - b/a = 0.48
Uncertainty                   : ...                                 ...
Eccentricity                  : ...                                 [(a/b)2-1]/[(a/b)2+1] = 0.58
Uncertainty                   : ...                                 ...
Cos-1(b/a)                    : ...                                 59 deg
Position Angle [Equinox]      :  24    deg [B1950]                  24 deg [J2000]
Uncertainty                   : ...                                 ...
Significance                  : No uncertainty reported
Diameter Reference Level      : About 25.0 B-mag arcsec^-2^   
Frequency                     : 4050         A                      7.40E+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          : 023618.         +295600.    (B1950)
Qualifiers                    : From new, raw data
NED Comment                   :                                         

No. 2 Published Units: Homogenized Units: Reference Code : 20032MASX.C.......: Published Object Name : 2MASX J02391496+3009060 Frequency Targeted : K_s (2MASS isophotal) Major Axis (2a) : a = 54.2 arcsec 2a = 108.40 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 43.36 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.400 b/a = 0.40 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.60 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.72 Uncertainty : ... ... Cos-1(b/a) : ... 66 deg Position Angle [Equinox] : 20 deg [J2000] 20 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 : 39.812290 30.151667 (J2000) Qualifiers : From new, raw data NED Comment :
No. 3 Published Units: Homogenized Units: Reference Code : 20032MASX.C.......: Published Object Name : 2MASX J02391496+3009060 Frequency Targeted : K_s (2MASS "total") Major Axis (2a) : a = 76.9 arcsec 2a = 153.80 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 61.52 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.400 b/a = 0.40 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.60 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.72 Uncertainty : ... ... Cos-1(b/a) : ... 66 deg Position Angle [Equinox] : 20 deg [J2000] 20 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 : 39.812290 30.151667 (J2000) Qualifiers : From new, raw data NED Comment :
No. 4 Published Units: Homogenized Units: Reference Code : 1964MCG2..C...0000V Published Object Name : MCG +05-07-027 Frequency Targeted : POSS1 103a-O Major Axis (2a) : 0.70 arcmin 2a = 42.00 arcsec Uncertainty : ... ... Minor Axis (2b) : 2b = 0.40 arcmin 2b = 24.00 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.57 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.43 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.51 Uncertainty : ... ... Cos-1(b/a) : ... 55 deg Position Angle [Equinox] : ... ... Uncertainty : ... ... Significance : No uncertainty reported Diameter Reference Level : Very high surface brightness Frequency : 4050 A 7.40E+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 : "Inner" diameter Coordinates Targeted : 023612 +2957 (B1950) Qualifiers : From new, raw data NED Comment :
No. 5 Published Units: Homogenized Units: Reference Code : 1964MCG2..C...0000V Published Object Name : MCG +05-07-027 Frequency Targeted : POSS1 103a-O Major Axis (2a) : 2.20 arcmin 2a = 132.00 arcsec Uncertainty : ... ... Minor Axis (2b) : 2b = 0.70 arcmin 2b = 42.00 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.32 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.68 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.82 Uncertainty : ... ... Cos-1(b/a) : ... 71 deg Position Angle [Equinox] : ... ... Uncertainty : ... ... Significance : No uncertainty reported Diameter Reference Level : Intermed. surface brightness Frequency : 4050 A 7.40E+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 : 023612 +2957 (B1950) Qualifiers : From new, raw data NED Comment :
No. 6 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : UGC 02141 Frequency Targeted : RC3 D_25, R_25 (blue) Major Axis (2a) : log(2a) + 1 = 1.40 2a = 150.70 arcsec Uncertainty : 0.04 14.50 arcsec Minor Axis (2b) : ... 2b = 65.86 arcsec Uncertainty : ... ... Axis Ratio : log(a/b) = 0.36 b/a = 0.44 Uncertainty : 0.05 0.05 Ellipticity : ... 1 - b/a = 0.56 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.68 Uncertainty : ... ... Cos-1(b/a) : ... 64 deg Position Angle [Equinox] : 24 deg [J2000] 24 deg [J2000] 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 : 023915.1 +300911. (J2000) Qualifiers : Homogenized from previously published data NED Comment :
No. 7 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : UGC 02141 Frequency Targeted : RC3 D_0 (blue) Major Axis (2a) : log(2a) + 1 = 1.43 2a = 161.50 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 : 023915.1 +300911. (J2000) Qualifiers : Homogenized from previously published data NED Comment : Extinction and inclination corrected.

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