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Date and Time of the Query: 2019-03-26 T17:53:26 PDT
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Diameter data point(s) for object NGC 5557

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
2.20 arcmin 2.00 arcmin ... ... ... ... 105
[B1950]
About 25.0 B-mag arcsec^-2^ 7.40E+14 132.00 ... 0.91 0.09 0.10 25 105
[J2000]
2 K_s (2MASS isophotal)
20032MASX.C.......:
56.9 (a) arcsec ... ... 0.880 (b/a) ... ... ... 90
[J2000]
20.0 K-mag arcsec^-2^ 1.38E+14 113.80 ... 0.88 0.12 0.13 28 90
[J2000]
3 K_s (2MASS "total")
20032MASX.C.......:
80.4 (a) arcsec ... ... 0.880 (b/a) ... ... ... 90
[J2000]
Diameter for "total" magnitude 1.38E+14 160.90 ... 0.88 0.12 0.13 28 90
[J2000]
4 POSS1 103a-O
1964MCG2..C...0000V
1.00 arcmin 0.80 arcmin ... ... ... ... ... Very high surface brightness 7.40E+14 60.00 ... 0.80 0.20 0.22 37 ...
5 RC3 D_25, R_25 (blue)
1991RC3.9.C...0000d
1.36 log(2a) + 1 ... ... 0.09
log(a/b)
0.03 ... ... 105
[J2000]
25.0 B-mag arcsec^-2^ 6.81E+14 137.50 9.80 0.81 0.19 0.20 36 105
[J2000]
6 RC3 A_e (Johnson B)
1991RC3.9.C...0000d
1.00 log(2a) + 1 ... ... ... 0.02 ... ... ... ... 6.81E+14 60.00 2.80 ... ... ... ... ...
7 RC3 D_0 (blue)
1991RC3.9.C...0000d
1.33 log(2a) + 1 ... ... ... ... ... ... ... 25.0 B-mag arcsec^-2^ 6.81E+14 128.30 ... ... ... ... ... ...
8 r (SDSS Isophotal)
2007SDSS6.C...0000:
68.63 (a) arcsec 49.05 arcsec ... ... ... ... 69.8
[J2000]
25.0 mag arcsec^-2^ 4.77E+14 137.25 ... 0.71 0.29 0.32 44 70
[J2000]
9 r (SDSS Petrosian)
2007SDSS6.C...0000:
9.32 (a) arcsec ... ... ... 0.242 ... ... ... ... 4.77E+14 18.64 0.48 ... ... ... ... ...
10 r (SDSS deVaucouleurs)
2007SDSS6.C...0000:
4.8000 (a) arcsec ... ... 0.799 (b/a) 0.018 ... ... 84.5
[J2000]
... 4.77E+14 9.60 0.04 0.80 0.20 0.22 37 85
[J2000]
11 r (SDSS Exponential)
2007SDSS6.C...0000:
3.6434 (a) arcsec ... ... 0.830 (b/a) 0.010 ... ... 88.9
[J2000]
... 4.77E+14 7.29 0.02 0.83 0.17 0.18 34 89
[J2000]


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 1973UGC...C...0000N
Published Object Name         : UGC 09161                     
Frequency Targeted            : POSS1 103a-O                  
Major Axis (2a)               : 2.20       arcmin                   2a = 132.00 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : 2b =  2.00      arcmin              2b = 120.00 arcsec 
Uncertainty                   : ...                                 ...
Axis Ratio                    : ...                                 b/a = 0.91
Uncertainty                   : ...                                 ...
Ellipticity                   : ...                                 1 - b/a = 0.09
Uncertainty                   : ...                                 ...
Eccentricity                  : ...                                 [(a/b)2-1]/[(a/b)2+1] = 0.10
Uncertainty                   : ...                                 ...
Cos-1(b/a)                    : ...                                 25 deg
Position Angle [Equinox]      : 105    deg [B1950]                  105 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          : 141618.         +364300.    (B1950)
Qualifiers                    : From new, raw data
NED Comment                   :                                         

No. 2 Published Units: Homogenized Units: Reference Code : 20032MASX.C.......: Published Object Name : 2MASX J14182570+3629372 Frequency Targeted : K_s (2MASS isophotal) Major Axis (2a) : a = 56.9 arcsec 2a = 113.80 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 100.14 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.880 b/a = 0.88 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.12 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.13 Uncertainty : ... ... Cos-1(b/a) : ... 28 deg Position Angle [Equinox] : 90 deg [J2000] 90 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 : 214.607132 36.493622 (J2000) Qualifiers : From new, raw data NED Comment :
No. 3 Published Units: Homogenized Units: Reference Code : 20032MASX.C.......: Published Object Name : 2MASX J14182570+3629372 Frequency Targeted : K_s (2MASS "total") Major Axis (2a) : a = 80.4 arcsec 2a = 160.90 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 141.59 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.880 b/a = 0.88 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.12 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.13 Uncertainty : ... ... Cos-1(b/a) : ... 28 deg Position Angle [Equinox] : 90 deg [J2000] 90 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 : 214.607132 36.493622 (J2000) Qualifiers : From new, raw data NED Comment :
No. 4 Published Units: Homogenized Units: Reference Code : 1964MCG2..C...0000V Published Object Name : MCG +06-31-093 Frequency Targeted : POSS1 103a-O Major Axis (2a) : 1.00 arcmin 2a = 60.00 arcsec Uncertainty : ... ... Minor Axis (2b) : 2b = 0.80 arcmin 2b = 48.00 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.80 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.20 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.22 Uncertainty : ... ... Cos-1(b/a) : ... 37 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 : 141618 +3643 (B1950) Qualifiers : From new, raw data NED Comment :
No. 5 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : UGC 09161 Frequency Targeted : RC3 D_25, R_25 (blue) Major Axis (2a) : log(2a) + 1 = 1.36 2a = 137.50 arcsec Uncertainty : 0.03 9.80 arcsec Minor Axis (2b) : ... 2b = 111.79 arcsec Uncertainty : ... ... Axis Ratio : log(a/b) = 0.09 b/a = 0.81 Uncertainty : 0.03 0.06 Ellipticity : ... 1 - b/a = 0.19 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.20 Uncertainty : ... ... Cos-1(b/a) : ... 36 deg Position Angle [Equinox] : 105 deg [J2000] 105 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 : 141826.2 +362938. (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 09161 Frequency Targeted : RC3 A_e (Johnson B) Major Axis (2a) : log(2a) + 1 = 1.00 2a = 60.00 arcsec Uncertainty : 0.02 2.80 arcsec Minor Axis (2b) : ... ... Uncertainty : ... ... Axis Ratio : ... ... Uncertainty : ... ... Ellipticity : ... ... Uncertainty : ... ... Eccentricity : ... ... Uncertainty : ... ... Cos-1(b/a) : ... ... Position Angle [Equinox] : ... ... Uncertainty : ... ... Significance : Mean error Diameter Reference Level : ... 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 : 141826.2 +362938. (J2000) Qualifiers : From new, raw data NED Comment : From magnitude-aperture curves.
No. 7 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : UGC 09161 Frequency Targeted : RC3 D_0 (blue) Major Axis (2a) : log(2a) + 1 = 1.33 2a = 128.30 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 : 141826.2 +362938. (J2000) Qualifiers : Homogenized from previously published data NED Comment : Extinction and inclination corrected.
No. 8 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J141825.72+362936.8 Frequency Targeted : r (SDSS Isophotal) Major Axis (2a) : a = 68.63 arcsec 2a = 137.25 arcsec Uncertainty : ... ... Minor Axis (2b) : b = 49.05 arcsec 2b = 98.10 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.71 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.29 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.32 Uncertainty : ... ... Cos-1(b/a) : ... 44 deg Position Angle [Equinox] : 69.8 deg [J2000] 70 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 : 214.6071829693 36.4935600658 (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 J141825.72+362936.8 Frequency Targeted : r (SDSS Petrosian) Major Axis (2a) : a = 9.32 arcsec 2a = 18.64 arcsec Uncertainty : 0.242 arcsec 0.48 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 : 214.6071829693 36.4935600658 (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 J141825.72+362936.8 Frequency Targeted : r (SDSS deVaucouleurs) Major Axis (2a) : a = 4.8000 arcsec 2a = 9.60 arcsec Uncertainty : 0.018 arcsec 0.04 arcsec Minor Axis (2b) : ... 2b = 7.67 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.799 b/a = 0.80 Uncertainty : 0.003 0.00 Ellipticity : ... 1 - b/a = 0.20 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.22 Uncertainty : ... ... Cos-1(b/a) : ... 37 deg Position Angle [Equinox] : 84.5 deg [J2000] 85 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 : 214.6071829693 36.4935600658 (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 J141825.72+362936.8 Frequency Targeted : r (SDSS Exponential) Major Axis (2a) : a = 3.6434 arcsec 2a = 7.29 arcsec Uncertainty : 0.010 arcsec 0.02 arcsec Minor Axis (2b) : ... 2b = 6.05 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.830 b/a = 0.83 Uncertainty : 0.003 0.00 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] : 88.9 deg [J2000] 89 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 : 214.6071829693 36.4935600658 (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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