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Date and Time of the Query: 2019-04-20 T19:13:24 PDT
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Diameter data point(s) for object NGC 4481

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.......:
20.0 (a) arcsec ... ... 0.420 (b/a) ... ... ... -35
[J2000]
20.0 K-mag arcsec^-2^ 1.38E+14 40.00 ... 0.42 0.58 0.70 65 145
[J2000]
2 K_s (2MASS "total")
20032MASX.C.......:
32.2 (a) arcsec ... ... 0.420 (b/a) ... ... ... -35
[J2000]
Diameter for "total" magnitude 1.38E+14 64.50 ... 0.42 0.58 0.70 65 145
[J2000]
3 POSS1 103a-O
1962MCG1..C...0000V
0.65 arcmin 0.25 arcmin ... ... ... ... ... Very high surface brightness 7.40E+14 39.00 ... 0.39 0.61 0.74 67 ...
4 r (SDSS Isophotal)
2004SDSS2.C...0000:
31.28 (a) arcsec 15.06 arcsec ... ... ... ... 145.6
[J2000]
25.0 mag arcsec^-2^ 4.77E+14 62.56 ... 0.48 0.52 0.62 61 146
[J2000]
5 r (SDSS Petrosian)
2004SDSS2.C...0000:
5.56 (a) arcsec ... ... ... 0.55 ... ... ... ... 4.77E+14 11.12 1.11 ... ... ... ... ...
6 r (SDSS de Vaucouleurs)
2004SDSS2.C...0000:
4.39 (a) arcsec ... ... 0.427 (b/a) 0.03 ... ... 146.8
[J2000]
... 4.77E+14 8.77 0.06 0.43 0.57 0.69 65 147
[J2000]
7 r (SDSS Exponential)
2004SDSS2.C...0000:
3.46 (a) arcsec ... ... 0.356 (b/a) 0.01 ... ... 148.4
[J2000]
... 4.77E+14 6.91 0.02 0.36 0.64 0.78 69 148
[J2000]
8 r (SDSS Isophotal)
2007SDSS6.C...0000:
31.28 (a) arcsec 15.06 arcsec ... ... ... ... 145.6
[J2000]
25.0 mag arcsec^-2^ 4.77E+14 62.56 ... 0.48 0.52 0.62 61 146
[J2000]
9 r (SDSS Petrosian)
2007SDSS6.C...0000:
5.56 (a) arcsec ... ... ... 0.553 ... ... ... ... 4.77E+14 11.12 1.10 ... ... ... ... ...
10 r (SDSS deVaucouleurs)
2007SDSS6.C...0000:
4.3856 (a) arcsec ... ... 0.427 (b/a) 0.029 ... ... 146.8
[J2000]
... 4.77E+14 8.77 0.06 0.43 0.57 0.69 65 147
[J2000]
11 r (SDSS Exponential)
2007SDSS6.C...0000:
3.4552 (a) arcsec ... ... 0.356 (b/a) 0.010 ... ... 148.4
[J2000]
... 4.77E+14 6.91 0.02 0.36 0.64 0.78 69 148
[J2000]


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 20032MASX.C.......:
Published Object Name         : 2MASX J12294832+6402020       
Frequency Targeted            : K_s (2MASS isophotal)         
Major Axis (2a)               : a = 20.0       arcsec               2a = 40.00 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : ...                                 2b = 16.80 arcsec
Uncertainty                   : ...                                 ...
Axis Ratio                    : b/a = 0.420                         b/a = 0.42
Uncertainty                   : ...                                 ...
Ellipticity                   : ...                                 1 - b/a = 0.58
Uncertainty                   : ...                                 ...
Eccentricity                  : ...                                 [(a/b)2-1]/[(a/b)2+1] = 0.70
Uncertainty                   : ...                                 ...
Cos-1(b/a)                    : ...                                 65 deg
Position Angle [Equinox]      :  -35   deg [J2000]                  145 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          : 187.451721      64.033775    (J2000)
Qualifiers                    : From new, raw data
NED Comment                   :                                         

No. 2 Published Units: Homogenized Units: Reference Code : 20032MASX.C.......: Published Object Name : 2MASX J12294832+6402020 Frequency Targeted : K_s (2MASS "total") Major Axis (2a) : a = 32.2 arcsec 2a = 64.50 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 27.09 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.420 b/a = 0.42 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.58 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.70 Uncertainty : ... ... Cos-1(b/a) : ... 65 deg Position Angle [Equinox] : -35 deg [J2000] 145 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 : 187.451721 64.033775 (J2000) Qualifiers : From new, raw data NED Comment :
No. 3 Published Units: Homogenized Units: Reference Code : 1962MCG1..C...0000V Published Object Name : MCG +11-15-057 Frequency Targeted : POSS1 103a-O Major Axis (2a) : 0.65 arcmin 2a = 39.00 arcsec Uncertainty : ... ... Minor Axis (2b) : 2b = 0.25 arcmin 2b = 15.00 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.39 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.61 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.74 Uncertainty : ... ... Cos-1(b/a) : ... 67 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 : 122730 +6417 (B1950) Qualifiers : From new, raw data NED Comment :
No. 4 Published Units: Homogenized Units: Reference Code : 2004SDSS2.C...0000: Published Object Name : SDSS J122948.67+640158.8 Frequency Targeted : r (SDSS Isophotal) Major Axis (2a) : a = 31.28 arcsec 2a = 62.56 arcsec Uncertainty : ... ... Minor Axis (2b) : b = 15.06 arcsec 2b = 30.12 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.48 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.52 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.62 Uncertainty : ... ... Cos-1(b/a) : ... 61 deg Position Angle [Equinox] : 145.6 deg [J2000] 146 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 : 187.4527740 64.0330124 (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 : 2004SDSS2.C...0000: Published Object Name : SDSS J122948.67+640158.8 Frequency Targeted : r (SDSS Petrosian) Major Axis (2a) : a = 5.56 arcsec 2a = 11.12 arcsec Uncertainty : 0.55 arcsec 1.11 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 : 187.4527740 64.0330124 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment :
No. 6 Published Units: Homogenized Units: Reference Code : 2004SDSS2.C...0000: Published Object Name : SDSS J122948.67+640158.8 Frequency Targeted : r (SDSS de Vaucouleurs) Major Axis (2a) : a = 4.39 arcsec 2a = 8.77 arcsec Uncertainty : 0.03 arcsec 0.06 arcsec Minor Axis (2b) : ... 2b = 3.74 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.427 b/a = 0.43 Uncertainty : 0.003 0.00 Ellipticity : ... 1 - b/a = 0.57 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.69 Uncertainty : ... ... Cos-1(b/a) : ... 65 deg Position Angle [Equinox] : 146.8 deg [J2000] 147 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 : 187.4527740 64.0330124 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment : Effective (half-light) radius
No. 7 Published Units: Homogenized Units: Reference Code : 2004SDSS2.C...0000: Published Object Name : SDSS J122948.67+640158.8 Frequency Targeted : r (SDSS Exponential) Major Axis (2a) : a = 3.46 arcsec 2a = 6.91 arcsec Uncertainty : 0.01 arcsec 0.02 arcsec Minor Axis (2b) : ... 2b = 2.46 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.356 b/a = 0.36 Uncertainty : 0.001 0.00 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] : 148.4 deg [J2000] 148 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 : 187.4527740 64.0330124 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment : Effective (half-light) radius
No. 8 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J122948.66+640158.8 Frequency Targeted : r (SDSS Isophotal) Major Axis (2a) : a = 31.28 arcsec 2a = 62.56 arcsec Uncertainty : ... ... Minor Axis (2b) : b = 15.06 arcsec 2b = 30.12 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.48 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.52 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.62 Uncertainty : ... ... Cos-1(b/a) : ... 61 deg Position Angle [Equinox] : 145.6 deg [J2000] 146 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 : 187.4527736802 64.0330131770 (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 J122948.66+640158.8 Frequency Targeted : r (SDSS Petrosian) Major Axis (2a) : a = 5.56 arcsec 2a = 11.12 arcsec Uncertainty : 0.553 arcsec 1.10 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 : 187.4527736802 64.0330131770 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment :
No. 10 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J122948.66+640158.8 Frequency Targeted : r (SDSS deVaucouleurs) Major Axis (2a) : a = 4.3856 arcsec 2a = 8.77 arcsec Uncertainty : 0.029 arcsec 0.06 arcsec Minor Axis (2b) : ... 2b = 3.75 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.427 b/a = 0.43 Uncertainty : 0.003 0.00 Ellipticity : ... 1 - b/a = 0.57 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.69 Uncertainty : ... ... Cos-1(b/a) : ... 65 deg Position Angle [Equinox] : 146.8 deg [J2000] 147 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 : 187.4527736802 64.0330131770 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment : Effective (half-light) radius
No. 11 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J122948.66+640158.8 Frequency Targeted : r (SDSS Exponential) Major Axis (2a) : a = 3.4552 arcsec 2a = 6.91 arcsec Uncertainty : 0.010 arcsec 0.02 arcsec Minor Axis (2b) : ... 2b = 2.46 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.356 b/a = 0.36 Uncertainty : 0.001 0.00 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] : 148.4 deg [J2000] 148 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 : 187.4527736802 64.0330131770 (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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