NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-05-22 T07:34:28 PDT
Help | Comment | NED Home

Diameter data point(s) for object IC 3494

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.......:
5.0 (a) arcsec ... ... 0.366 (b/a) ... ... ... -40
[J2000]
20.0 K-mag arcsec^-2^ 1.38E+14 10.00 ... 0.37 0.63 0.76 69 140
[J2000]
2 K_s (2MASS "total")
20032MASX.C.......:
6.9 (a) arcsec ... ... 0.366 (b/a) ... ... ... -40
[J2000]
Diameter for "total" magnitude 1.38E+14 13.70 ... 0.37 0.63 0.76 69 140
[J2000]
3 r (SDSS Isophotal)
2007SDSS6.C...0000:
11.31 (a) arcsec 10.72 arcsec ... ... ... ... 70.8
[J2000]
25.0 mag arcsec^-2^ 4.77E+14 22.63 ... 0.95 0.05 0.05 19 71
[J2000]
4 r (SDSS Petrosian)
2007SDSS6.C...0000:
3.14 (a) arcsec ... ... ... 0.041 ... ... ... ... 4.77E+14 6.27 0.08 ... ... ... ... ...
5 r (SDSS deVaucouleurs)
2007SDSS6.C...0000:
2.4301 (a) arcsec ... ... 0.716 (b/a) 0.044 ... ... 142.9
[J2000]
... 4.77E+14 4.86 0.09 0.72 0.28 0.32 44 143
[J2000]
6 r (SDSS Exponential)
2007SDSS6.C...0000:
1.2274 (a) arcsec ... ... 0.683 (b/a) 0.010 ... ... 142.0
[J2000]
... 4.77E+14 2.46 0.02 0.68 0.32 0.36 47 142
[J2000]


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 20032MASX.C.......:
Published Object Name         : 2MASX J12331373+2735021       
Frequency Targeted            : K_s (2MASS isophotal)         
Major Axis (2a)               : a = 5.0        arcsec               2a = 10.00 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : ...                                 2b = 3.66 arcsec
Uncertainty                   : ...                                 ...
Axis Ratio                    : b/a = 0.366                         b/a = 0.37
Uncertainty                   : ...                                 ...
Ellipticity                   : ...                                 1 - b/a = 0.63
Uncertainty                   : ...                                 ...
Eccentricity                  : ...                                 [(a/b)2-1]/[(a/b)2+1] = 0.76
Uncertainty                   : ...                                 ...
Cos-1(b/a)                    : ...                                 69 deg
Position Angle [Equinox]      :  -40   deg [J2000]                  140 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          : 188.307144      27.584114    (J2000)
Qualifiers                    : From new, raw data
NED Comment                   :                                         

No. 2 Published Units: Homogenized Units: Reference Code : 20032MASX.C.......: Published Object Name : 2MASX J12331373+2735021 Frequency Targeted : K_s (2MASS "total") Major Axis (2a) : a = 6.9 arcsec 2a = 13.70 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 5.01 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.366 b/a = 0.37 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.63 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.76 Uncertainty : ... ... Cos-1(b/a) : ... 69 deg Position Angle [Equinox] : -40 deg [J2000] 140 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 : 188.307144 27.584114 (J2000) Qualifiers : From new, raw data NED Comment :
No. 3 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J123313.71+273502.7 Frequency Targeted : r (SDSS Isophotal) Major Axis (2a) : a = 11.31 arcsec 2a = 22.63 arcsec Uncertainty : ... ... Minor Axis (2b) : b = 10.72 arcsec 2b = 21.45 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.95 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.05 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.05 Uncertainty : ... ... Cos-1(b/a) : ... 19 deg Position Angle [Equinox] : 70.8 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 : 188.3071337650 27.5840992445 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment :
No. 4 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J123313.71+273502.7 Frequency Targeted : r (SDSS Petrosian) Major Axis (2a) : a = 3.14 arcsec 2a = 6.27 arcsec Uncertainty : 0.041 arcsec 0.08 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 : 188.3071337650 27.5840992445 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment :
No. 5 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J123313.71+273502.7 Frequency Targeted : r (SDSS deVaucouleurs) Major Axis (2a) : a = 2.4301 arcsec 2a = 4.86 arcsec Uncertainty : 0.044 arcsec 0.09 arcsec Minor Axis (2b) : ... 2b = 3.48 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.716 b/a = 0.72 Uncertainty : 0.010 0.01 Ellipticity : ... 1 - b/a = 0.28 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.32 Uncertainty : ... ... Cos-1(b/a) : ... 44 deg Position Angle [Equinox] : 142.9 deg [J2000] 143 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 : 188.3071337650 27.5840992445 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment : Effective (half-light) radius
No. 6 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J123313.71+273502.7 Frequency Targeted : r (SDSS Exponential) Major Axis (2a) : a = 1.2274 arcsec 2a = 2.46 arcsec Uncertainty : 0.010 arcsec 0.02 arcsec Minor Axis (2b) : ... 2b = 1.68 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.683 b/a = 0.68 Uncertainty : 0.008 0.01 Ellipticity : ... 1 - b/a = 0.32 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.36 Uncertainty : ... ... Cos-1(b/a) : ... 47 deg Position Angle [Equinox] : 142.0 deg [J2000] 142 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 : 188.3071337650 27.5840992445 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment : Effective (half-light) radius

Back to NED Home