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Date and Time of the Query: 2019-05-20 T14:50:10 PDT
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Diameter data point(s) for object IC 3913

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.......:
12.4 (a) arcsec ... ... 0.700 (b/a) ... ... ... 40
[J2000]
20.0 K-mag arcsec^-2^ 1.38E+14 24.80 ... 0.70 0.30 0.34 46 40
[J2000]
2 K_s (2MASS "total")
20032MASX.C.......:
28.3 (a) arcsec ... ... 0.700 (b/a) ... ... ... 40
[J2000]
Diameter for "total" magnitude 1.38E+14 56.60 ... 0.70 0.30 0.34 46 40
[J2000]
3 POSS1 103a-O
1964MCG2..C...0000V
0.60 arcmin 0.50 arcmin ... ... ... ... ... Intermed. surface brightness 7.40E+14 36.00 ... 0.83 0.17 0.18 34 ...
4 RC3 D_25, R_25 (blue)
1991RC3.9.C...0000d
0.85 log(2a) + 1 ... ... 0.11
log(a/b)
0.07 ... ... ... 25.0 B-mag arcsec^-2^ 6.81E+14 42.50 7.40 0.78 0.22 0.25 39 ...
5 RC3 D_0 (blue)
1991RC3.9.C...0000d
0.85 log(2a) + 1 ... ... ... ... ... ... ... 25.0 B-mag arcsec^-2^ 6.81E+14 42.50 ... ... ... ... ... ...
6 r (SDSS Isophotal)
2007SDSS6.C...0000:
24.21 (a) arcsec 18.11 arcsec ... ... ... ... 59.3
[J2000]
25.0 mag arcsec^-2^ 4.77E+14 48.41 ... 0.75 0.25 0.28 42 59
[J2000]
7 r (SDSS Petrosian)
2007SDSS6.C...0000:
7.69 (a) arcsec ... ... ... 0.207 ... ... ... ... 4.77E+14 15.37 0.41 ... ... ... ... ...
8 r (SDSS deVaucouleurs)
2007SDSS6.C...0000:
9.4088 (a) arcsec ... ... 0.804 (b/a) 0.115 ... ... 69.1
[J2000]
... 4.77E+14 18.82 0.23 0.80 0.20 0.21 36 69
[J2000]
9 r (SDSS Exponential)
2007SDSS6.C...0000:
3.9690 (a) arcsec ... ... 0.742 (b/a) 0.029 ... ... 63.1
[J2000]
... 4.77E+14 7.94 0.06 0.74 0.26 0.29 42 63
[J2000]


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 20032MASX.C.......:
Published Object Name         : 2MASX J12562853+2717280       
Frequency Targeted            : K_s (2MASS isophotal)         
Major Axis (2a)               : a = 12.4       arcsec               2a = 24.80 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : ...                                 2b = 17.36 arcsec
Uncertainty                   : ...                                 ...
Axis Ratio                    : b/a = 0.700                         b/a = 0.70
Uncertainty                   : ...                                 ...
Ellipticity                   : ...                                 1 - b/a = 0.30
Uncertainty                   : ...                                 ...
Eccentricity                  : ...                                 [(a/b)2-1]/[(a/b)2+1] = 0.34
Uncertainty                   : ...                                 ...
Cos-1(b/a)                    : ...                                 46 deg
Position Angle [Equinox]      :   40   deg [J2000]                  40 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          : 194.118927      27.291214    (J2000)
Qualifiers                    : From new, raw data
NED Comment                   :                                         

No. 2 Published Units: Homogenized Units: Reference Code : 20032MASX.C.......: Published Object Name : 2MASX J12562853+2717280 Frequency Targeted : K_s (2MASS "total") Major Axis (2a) : a = 28.3 arcsec 2a = 56.60 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 39.62 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.700 b/a = 0.70 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.30 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.34 Uncertainty : ... ... Cos-1(b/a) : ... 46 deg Position Angle [Equinox] : 40 deg [J2000] 40 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 : 194.118927 27.291214 (J2000) Qualifiers : From new, raw data NED Comment :
No. 3 Published Units: Homogenized Units: Reference Code : 1964MCG2..C...0000V Published Object Name : MCG +05-31-012 Frequency Targeted : POSS1 103a-O Major Axis (2a) : 0.60 arcmin 2a = 36.00 arcsec Uncertainty : ... ... Minor Axis (2b) : 2b = 0.50 arcmin 2b = 30.00 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.83 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.17 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.18 Uncertainty : ... ... Cos-1(b/a) : ... 34 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 : 125406 +2733 (B1950) Qualifiers : From new, raw data NED Comment :
No. 4 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : MCG +05-31-012 Frequency Targeted : RC3 D_25, R_25 (blue) Major Axis (2a) : log(2a) + 1 = 0.85 2a = 42.50 arcsec Uncertainty : 0.07 7.40 arcsec Minor Axis (2b) : ... 2b = 32.98 arcsec Uncertainty : ... ... Axis Ratio : log(a/b) = 0.11 b/a = 0.78 Uncertainty : 0.06 0.12 Ellipticity : ... 1 - b/a = 0.22 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.25 Uncertainty : ... ... Cos-1(b/a) : ... 39 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 : 125628.6 +271729. (J2000) Qualifiers : Homogenized from previously published data NED Comment :
No. 5 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : MCG +05-31-012 Frequency Targeted : RC3 D_0 (blue) Major Axis (2a) : log(2a) + 1 = 0.85 2a = 42.50 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 : 125628.6 +271729. (J2000) Qualifiers : Homogenized from previously published data NED Comment : Extinction and inclination corrected.
No. 6 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J125628.57+271728.6 Frequency Targeted : r (SDSS Isophotal) Major Axis (2a) : a = 24.21 arcsec 2a = 48.41 arcsec Uncertainty : ... ... Minor Axis (2b) : b = 18.11 arcsec 2b = 36.21 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.75 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.25 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.28 Uncertainty : ... ... Cos-1(b/a) : ... 42 deg Position Angle [Equinox] : 59.3 deg [J2000] 59 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 : 194.1190554736 27.2912811939 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment :
No. 7 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J125628.57+271728.6 Frequency Targeted : r (SDSS Petrosian) Major Axis (2a) : a = 7.69 arcsec 2a = 15.37 arcsec Uncertainty : 0.207 arcsec 0.41 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 : 194.1190554736 27.2912811939 (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 J125628.57+271728.6 Frequency Targeted : r (SDSS deVaucouleurs) Major Axis (2a) : a = 9.4088 arcsec 2a = 18.82 arcsec Uncertainty : 0.115 arcsec 0.23 arcsec Minor Axis (2b) : ... 2b = 15.13 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.804 b/a = 0.80 Uncertainty : 0.008 0.01 Ellipticity : ... 1 - b/a = 0.20 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.21 Uncertainty : ... ... Cos-1(b/a) : ... 36 deg Position Angle [Equinox] : 69.1 deg [J2000] 69 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 : 194.1190554736 27.2912811939 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment : Effective (half-light) radius
No. 9 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J125628.57+271728.6 Frequency Targeted : r (SDSS Exponential) Major Axis (2a) : a = 3.9690 arcsec 2a = 7.94 arcsec Uncertainty : 0.029 arcsec 0.06 arcsec Minor Axis (2b) : ... 2b = 5.89 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.742 b/a = 0.74 Uncertainty : 0.006 0.01 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] : 63.1 deg [J2000] 63 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 : 194.1190554736 27.2912811939 (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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