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Date and Time of the Query: 2019-08-18 T06:36:59 PDT
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Diameter data point(s) for object NGC 4256

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
4.50 arcmin 0.80 arcmin ... ... ... ... 42
[B1950]
About 25.0 B-mag arcsec^-2^ 7.40E+14 270.00 ... 0.18 0.82 0.94 80 42
[J2000]
2 POSS1 103a-O
1962MCG1..C...0000V
3.20 arcmin 0.45 arcmin ... ... ... ... ... Very high surface brightness 7.40E+14 192.00 ... 0.14 0.86 0.96 82 ...
3 POSS1 103a-O
1962MCG1..C...0000V
3.80 arcmin 0.50 arcmin ... ... ... ... ... Intermed. surface brightness 7.40E+14 228.00 ... 0.13 0.87 0.97 82 ...
4 RC3 D_25, R_25 (blue)
1991RC3.9.C...0000d
1.65 log(2a) + 1 ... ... 0.77
log(a/b)
0.02 ... ... 42
[J2000]
25.0 B-mag arcsec^-2^ 6.81E+14 268.00 12.60 0.17 0.83 0.94 80 42
[J2000]
5 RC3 D_0 (blue)
1991RC3.9.C...0000d
1.65 log(2a) + 1 ... ... ... ... ... ... ... 25.0 B-mag arcsec^-2^ 6.81E+14 268.00 ... ... ... ... ... ...
6 K_s (LGA/2MASS isophotal)
2003AJ....125..525J
96.1 (a) arcsec ... ... 0.300 (b/a) ... ... ... 42.0
[J2000]
20.0 K-mag arcsec^-2^ 1.38E+14 192.20 ... 0.30 0.70 0.83 73 42
[J2000]
7 K_s (LGA/2MASS "total")
2003AJ....125..525J
163.3 (a) arcsec ... ... 0.300 (b/a) ... ... ... 42.0
[J2000]
Diameter for "total" magnitude 1.38E+14 326.60 ... 0.30 0.70 0.83 73 42
[J2000]
8 r (SDSS Isophotal)
2007SDSS6.C...0000:
50.65 (a) arcsec 23.66 arcsec ... ... ... ... 41.5
[J2000]
25.0 mag arcsec^-2^ 4.77E+14 101.30 ... 0.47 0.53 0.64 62 42
[J2000]
9 r (SDSS Petrosian)
2007SDSS6.C...0000:
13.52 (a) arcsec ... ... ... 3.931 ... ... ... ... 4.77E+14 27.04 7.86 ... ... ... ... ...
10 r (SDSS deVaucouleurs)
2007SDSS6.C...0000:
6.3584 (a) arcsec ... ... 0.327 (b/a) 0.034 ... ... 37.9
[J2000]
... 4.77E+14 12.72 0.07 0.33 0.67 0.81 71 38
[J2000]
11 r (SDSS Exponential)
2007SDSS6.C...0000:
5.8143 (a) arcsec ... ... 0.385 (b/a) 0.026 ... ... 38.4
[J2000]
... 4.77E+14 11.63 0.05 0.39 0.61 0.74 67 38
[J2000]


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 1973UGC...C...0000N
Published Object Name         : UGC 07351                     
Frequency Targeted            : POSS1 103a-O                  
Major Axis (2a)               : 4.50       arcmin                   2a = 270.00 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : 2b =  0.80      arcmin              2b = 48.00 arcsec 
Uncertainty                   : ...                                 ...
Axis Ratio                    : ...                                 b/a = 0.18
Uncertainty                   : ...                                 ...
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]      :  42    deg [B1950]                  42 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          : 121624.         +661000.    (B1950)
Qualifiers                    : From new, raw data
NED Comment                   :                                         

No. 2 Published Units: Homogenized Units: Reference Code : 1962MCG1..C...0000V Published Object Name : MCG +11-15-045 Frequency Targeted : POSS1 103a-O Major Axis (2a) : 3.20 arcmin 2a = 192.00 arcsec Uncertainty : ... ... Minor Axis (2b) : 2b = 0.45 arcmin 2b = 27.00 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.14 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.86 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.96 Uncertainty : ... ... Cos-1(b/a) : ... 82 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 : 121624 +6610 (B1950) Qualifiers : From new, raw data NED Comment :
No. 3 Published Units: Homogenized Units: Reference Code : 1962MCG1..C...0000V Published Object Name : MCG +11-15-045 Frequency Targeted : POSS1 103a-O Major Axis (2a) : 3.80 arcmin 2a = 228.00 arcsec Uncertainty : ... ... Minor Axis (2b) : 2b = 0.50 arcmin 2b = 30.00 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.13 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.87 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.97 Uncertainty : ... ... Cos-1(b/a) : ... 82 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 : 121624 +6610 (B1950) Qualifiers : From new, raw data NED Comment :
No. 4 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : UGC 07351 Frequency Targeted : RC3 D_25, R_25 (blue) Major Axis (2a) : log(2a) + 1 = 1.65 2a = 268.00 arcsec Uncertainty : 0.02 12.60 arcsec Minor Axis (2b) : ... 2b = 45.56 arcsec Uncertainty : ... ... Axis Ratio : log(a/b) = 0.77 b/a = 0.17 Uncertainty : 0.03 0.01 Ellipticity : ... 1 - b/a = 0.83 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.94 Uncertainty : ... ... Cos-1(b/a) : ... 80 deg Position Angle [Equinox] : 42 deg [J2000] 42 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 : 121844.2 +655358. (J2000) Qualifiers : Homogenized from previously published data NED Comment :
No. 5 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : UGC 07351 Frequency Targeted : RC3 D_0 (blue) Major Axis (2a) : log(2a) + 1 = 1.65 2a = 268.00 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 : 121844.2 +655358. (J2000) Qualifiers : Homogenized from previously published data NED Comment : Extinction and inclination corrected.
No. 6 Published Units: Homogenized Units: Reference Code : 2003AJ....125..525J Published Object Name : NGC 4256 Frequency Targeted : K_s (LGA/2MASS isophotal) Major Axis (2a) : a = 96.1 arcsec 2a = 192.20 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 57.66 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.300 b/a = 0.30 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.70 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.83 Uncertainty : ... ... Cos-1(b/a) : ... 73 deg Position Angle [Equinox] : 42.0 deg [J2000] 42 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 : 184.679321 65.898079 (J2000) Qualifiers : From new, raw data NED Comment :
No. 7 Published Units: Homogenized Units: Reference Code : 2003AJ....125..525J Published Object Name : NGC 4256 Frequency Targeted : K_s (LGA/2MASS "total") Major Axis (2a) : a = 163.3 arcsec 2a = 326.60 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 97.98 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.300 b/a = 0.30 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.70 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.83 Uncertainty : ... ... Cos-1(b/a) : ... 73 deg Position Angle [Equinox] : 42.0 deg [J2000] 42 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 : 184.679321 65.898079 (J2000) Qualifiers : From new, raw data NED Comment :
No. 8 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J121843.08+655353.6 Frequency Targeted : r (SDSS Isophotal) Major Axis (2a) : a = 50.65 arcsec 2a = 101.30 arcsec Uncertainty : ... ... Minor Axis (2b) : b = 23.66 arcsec 2b = 47.32 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.47 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.53 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.64 Uncertainty : ... ... Cos-1(b/a) : ... 62 deg Position Angle [Equinox] : 41.5 deg [J2000] 42 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 : 184.6795239938 65.8982472674 (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 J121843.08+655353.6 Frequency Targeted : r (SDSS Petrosian) Major Axis (2a) : a = 13.52 arcsec 2a = 27.04 arcsec Uncertainty : 3.931 arcsec 7.86 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 : 184.6795239938 65.8982472674 (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 J121843.08+655353.6 Frequency Targeted : r (SDSS deVaucouleurs) Major Axis (2a) : a = 6.3584 arcsec 2a = 12.72 arcsec Uncertainty : 0.034 arcsec 0.07 arcsec Minor Axis (2b) : ... 2b = 4.16 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.327 b/a = 0.33 Uncertainty : 0.002 0.00 Ellipticity : ... 1 - b/a = 0.67 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.81 Uncertainty : ... ... Cos-1(b/a) : ... 71 deg Position Angle [Equinox] : 37.9 deg [J2000] 38 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 : 184.6795239938 65.8982472674 (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 J121843.08+655353.6 Frequency Targeted : r (SDSS Exponential) Major Axis (2a) : a = 5.8143 arcsec 2a = 11.63 arcsec Uncertainty : 0.026 arcsec 0.05 arcsec Minor Axis (2b) : ... 2b = 4.48 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.385 b/a = 0.39 Uncertainty : 0.002 0.00 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] : 38.4 deg [J2000] 38 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 : 184.6795239938 65.8982472674 (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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