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Date and Time of the Query: 2019-03-18 T18:30:57 PDT
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Diameter data point(s) for object IC 3949

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
1.00 arcmin 0.15 arcmin ... ... ... ... 73
[B1950]
About 25.0 B-mag arcsec^-2^ 7.40E+14 60.00 ... 0.15 0.85 0.96 81 73
[J2000]
2 K_s (2MASS isophotal)
20032MASX.C.......:
24.9 (a) arcsec ... ... 0.240 (b/a) ... ... ... 75
[J2000]
20.0 K-mag arcsec^-2^ 1.38E+14 49.80 ... 0.24 0.76 0.89 76 75
[J2000]
3 K_s (2MASS "total")
20032MASX.C.......:
40.0 (a) arcsec ... ... 0.240 (b/a) ... ... ... 75
[J2000]
Diameter for "total" magnitude 1.38E+14 80.00 ... 0.24 0.76 0.89 76 75
[J2000]
4 POSS1 103a-O
1964MCG2..C...0000V
0.70 arcmin 0.15 arcmin ... ... ... ... ... Very high surface brightness 7.40E+14 42.00 ... 0.21 0.79 0.91 78 ...
5 RC3 D_25, R_25 (blue)
1991RC3.9.C...0000d
1.01 log(2a) + 1 ... ... 0.73
log(a/b)
0.05 ... ... 73
[J2000]
25.0 B-mag arcsec^-2^ 6.81E+14 61.40 7.50 0.19 0.81 0.93 79 73
[J2000]
6 RC3 D_0 (blue)
1991RC3.9.C...0000d
0.91 log(2a) + 1 ... ... ... ... ... ... ... 25.0 B-mag arcsec^-2^ 6.81E+14 48.80 ... ... ... ... ... ...
7 r (SDSS Isophotal)
2007SDSS6.C...0000:
40.96 (a) arcsec 8.55 arcsec ... ... ... ... 71.0
[J2000]
25.0 mag arcsec^-2^ 4.77E+14 81.92 ... 0.21 0.79 0.92 78 71
[J2000]
8 r (SDSS Petrosian)
2007SDSS6.C...0000:
6.65 (a) arcsec ... ... ... 1.811 ... ... ... ... 4.77E+14 13.31 3.62 ... ... ... ... ...
9 r (SDSS deVaucouleurs)
2007SDSS6.C...0000:
7.0098 (a) arcsec ... ... 0.181 (b/a) 0.065 ... ... 66.1
[J2000]
... 4.77E+14 14.02 0.13 0.18 0.82 0.94 80 66
[J2000]
10 r (SDSS Exponential)
2007SDSS6.C...0000:
4.4841 (a) arcsec ... ... 0.147 (b/a) 0.022 ... ... 66.0
[J2000]
... 4.77E+14 8.97 0.04 0.15 0.85 0.96 82 66
[J2000]


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 1973UGC...C...0000N
Published Object Name         : UGC 08096                     
Frequency Targeted            : POSS1 103a-O                  
Major Axis (2a)               : 1.00       arcmin                   2a = 60.00 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : 2b =  0.15      arcmin              2b = 9.00 arcsec 
Uncertainty                   : ...                                 ...
Axis Ratio                    : ...                                 b/a = 0.15
Uncertainty                   : ...                                 ...
Ellipticity                   : ...                                 1 - b/a = 0.85
Uncertainty                   : ...                                 ...
Eccentricity                  : ...                                 [(a/b)2-1]/[(a/b)2+1] = 0.96
Uncertainty                   : ...                                 ...
Cos-1(b/a)                    : ...                                 81 deg
Position Angle [Equinox]      :  73    deg [B1950]                  73 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          : 125630.         +280600.    (B1950)
Qualifiers                    : From new, raw data
NED Comment                   :                                         

No. 2 Published Units: Homogenized Units: Reference Code : 20032MASX.C.......: Published Object Name : 2MASX J12585577+2749589 Frequency Targeted : K_s (2MASS isophotal) Major Axis (2a) : a = 24.9 arcsec 2a = 49.80 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 11.95 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.240 b/a = 0.24 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.76 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.89 Uncertainty : ... ... Cos-1(b/a) : ... 76 deg Position Angle [Equinox] : 75 deg [J2000] 75 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 : 194.732529 27.833120 (J2000) Qualifiers : From new, raw data NED Comment :
No. 3 Published Units: Homogenized Units: Reference Code : 20032MASX.C.......: Published Object Name : 2MASX J12585577+2749589 Frequency Targeted : K_s (2MASS "total") Major Axis (2a) : a = 40.0 arcsec 2a = 80.00 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 19.20 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.240 b/a = 0.24 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.76 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.89 Uncertainty : ... ... Cos-1(b/a) : ... 76 deg Position Angle [Equinox] : 75 deg [J2000] 75 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 : 194.732529 27.833120 (J2000) Qualifiers : From new, raw data NED Comment :
No. 4 Published Units: Homogenized Units: Reference Code : 1964MCG2..C...0000V Published Object Name : MCG +05-31-052 Frequency Targeted : POSS1 103a-O Major Axis (2a) : 0.70 arcmin 2a = 42.00 arcsec Uncertainty : ... ... Minor Axis (2b) : 2b = 0.15 arcmin 2b = 9.00 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.21 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.79 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.91 Uncertainty : ... ... Cos-1(b/a) : ... 78 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 : "Outer" diameter Coordinates Targeted : 125636 +2806 (B1950) Qualifiers : From new, raw data NED Comment :
No. 5 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : UGC 08096 Frequency Targeted : RC3 D_25, R_25 (blue) Major Axis (2a) : log(2a) + 1 = 1.01 2a = 61.40 arcsec Uncertainty : 0.05 7.50 arcsec Minor Axis (2b) : ... 2b = 11.42 arcsec Uncertainty : ... ... Axis Ratio : log(a/b) = 0.73 b/a = 0.19 Uncertainty : 0.03 0.01 Ellipticity : ... 1 - b/a = 0.81 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.93 Uncertainty : ... ... Cos-1(b/a) : ... 79 deg Position Angle [Equinox] : 73 deg [J2000] 73 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 : 125856.7 +275002. (J2000) Qualifiers : Homogenized from previously published data NED Comment :
No. 6 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : UGC 08096 Frequency Targeted : RC3 D_0 (blue) Major Axis (2a) : log(2a) + 1 = 0.91 2a = 48.80 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 : 125856.7 +275002. (J2000) Qualifiers : Homogenized from previously published data NED Comment : Extinction and inclination corrected.
No. 7 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J125855.96+275000.2 Frequency Targeted : r (SDSS Isophotal) Major Axis (2a) : a = 40.96 arcsec 2a = 81.92 arcsec Uncertainty : ... ... Minor Axis (2b) : b = 8.55 arcsec 2b = 17.10 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.21 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.79 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.92 Uncertainty : ... ... Cos-1(b/a) : ... 78 deg Position Angle [Equinox] : 71.0 deg [J2000] 71 deg [J2000] Uncertainty : ... ... Significance : No uncertainty reported Diameter Reference Level : 25.0 mag arcsec^-2^ Frequency : 6290 A 4.77E+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 : 194.7331753669 27.8333931428 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment :
No. 8 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J125855.96+275000.2 Frequency Targeted : r (SDSS Petrosian) Major Axis (2a) : a = 6.65 arcsec 2a = 13.31 arcsec Uncertainty : 1.811 arcsec 3.62 arcsec Minor Axis (2b) : ... ... Uncertainty : ... ... Axis Ratio : ... ... Uncertainty : ... ... Ellipticity : ... ... Uncertainty : ... ... Eccentricity : ... ... Uncertainty : ... ... Cos-1(b/a) : ... ... Position Angle [Equinox] : ... ... Uncertainty : ... ... Significance : Based on count statistics only Diameter Reference Level : ... Frequency : 6290 A 4.77E+14 Hz Frequency Mode : Broad-band detector (e.g. photographic plate) Measurement Mode Detector Type : Maps (e.g., 2MASS, VLA, Sloan) Fitting Technique : Profile fitting to image Measured Quantity : See comments Qualifiers : A radius is given in DIA_MAJ, not a diameter Coordinates Targeted : 194.7331753669 27.8333931428 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment :
No. 9 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J125855.96+275000.2 Frequency Targeted : r (SDSS deVaucouleurs) Major Axis (2a) : a = 7.0098 arcsec 2a = 14.02 arcsec Uncertainty : 0.065 arcsec 0.13 arcsec Minor Axis (2b) : ... 2b = 2.54 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.181 b/a = 0.18 Uncertainty : 0.002 0.00 Ellipticity : ... 1 - b/a = 0.82 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.94 Uncertainty : ... ... Cos-1(b/a) : ... 80 deg Position Angle [Equinox] : 66.1 deg [J2000] 66 deg [J2000] Uncertainty : ... ... Significance : Based on count statistics only Diameter Reference Level : ... Frequency : 6290 A 4.77E+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 : Half-light ("effective") diameter Qualifiers : A radius is given in DIA_MAJ, not a diameter Coordinates Targeted : 194.7331753669 27.8333931428 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment : Effective (half-light) radius
No. 10 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J125855.96+275000.2 Frequency Targeted : r (SDSS Exponential) Major Axis (2a) : a = 4.4841 arcsec 2a = 8.97 arcsec Uncertainty : 0.022 arcsec 0.04 arcsec Minor Axis (2b) : ... 2b = 1.32 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.147 b/a = 0.15 Uncertainty : 0.001 0.00 Ellipticity : ... 1 - b/a = 0.85 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.96 Uncertainty : ... ... Cos-1(b/a) : ... 82 deg Position Angle [Equinox] : 66.0 deg [J2000] 66 deg [J2000] Uncertainty : ... ... Significance : Based on count statistics only Diameter Reference Level : ... Frequency : 6290 A 4.77E+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 : Half-light ("effective") diameter Qualifiers : A radius is given in DIA_MAJ, not a diameter Coordinates Targeted : 194.7331753669 27.8333931428 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment : Effective (half-light) radius

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