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Date and Time of the Query: 2019-03-25 T17:18:18 PDT
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Diameter data point(s) for object NGC 2541

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
8.10 arcmin 3.50 arcmin ... ... ... ... 165
[B1950]
About 25.0 B-mag arcsec^-2^ 7.40E+14 486.00 ... 0.43 0.57 0.69 64 165
[J2000]
2 POSS1 103a-O
1962MCG1..C...0000V
1.00 arcmin 0.50 arcmin ... ... ... ... ... High surface brightness 7.40E+14 60.00 ... 0.50 0.50 0.60 60 ...
3 POSS1 103a-O
1962MCG1..C...0000V
6.00 arcmin 3.00 arcmin ... ... ... ... ... Very high surface brightness 7.40E+14 360.00 ... 0.50 0.50 0.60 60 ...
4 RC3 D_25, R_25 (blue)
1991RC3.9.C...0000d
1.80 log(2a) + 1 ... ... 0.30
log(a/b)
0.02 ... ... 165
[J2000]
25.0 B-mag arcsec^-2^ 6.81E+14 378.60 17.80 0.50 0.50 0.60 60 165
[J2000]
5 RC3 A_e (Johnson B)
1991RC3.9.C...0000d
1.30 log(2a) + 1 ... ... ... 0.02 ... ... ... ... 6.81E+14 119.70 5.60 ... ... ... ... ...
6 RC3 D_0 (blue)
1991RC3.9.C...0000d
1.82 log(2a) + 1 ... ... ... ... ... ... ... 25.0 B-mag arcsec^-2^ 6.81E+14 396.40 ... ... ... ... ... ...
7 K_s (LGA/2MASS isophotal)
2003AJ....125..525J
38.5 (a) arcsec ... ... 0.470 (b/a) ... ... ... -5.0
[J2000]
20.0 K-mag arcsec^-2^ 1.38E+14 77.00 ... 0.47 0.53 0.64 62 175
[J2000]
8 K_s (LGA/2MASS "total")
2003AJ....125..525J
75.2 (a) arcsec ... ... 0.470 (b/a) ... ... ... -5.0
[J2000]
Diameter for "total" magnitude 1.38E+14 150.40 ... 0.47 0.53 0.64 62 175
[J2000]
9 r (SDSS Isophotal)
2007SDSS6.C...0000:
81.19 (a) arcsec 36.03 arcsec ... ... ... ... 176.5
[J2000]
25.0 mag arcsec^-2^ 4.77E+14 162.38 ... 0.44 0.56 0.67 64 177
[J2000]
10 r (SDSS Petrosian)
2007SDSS6.C...0000:
25.17 (a) arcsec ... ... ... 8.779 ... ... ... ... 4.77E+14 50.34 17.56 ... ... ... ... ...
11 r (SDSS deVaucouleurs)
2007SDSS6.C...0000:
11.7485 (a) arcsec ... ... 0.945 (b/a) 0.208 ... ... 172.9
[J2000]
... 4.77E+14 23.50 0.42 0.94 0.06 0.06 19 173
[J2000]
12 r (SDSS Exponential)
2007SDSS6.C...0000:
9.0466 (a) arcsec ... ... 0.548 (b/a) 0.053 ... ... 173.2
[J2000]
... 4.77E+14 18.09 0.11 0.55 0.45 0.54 57 173
[J2000]


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 1973UGC...C...0000N
Published Object Name         : UGC 04284                     
Frequency Targeted            : POSS1 103a-O                  
Major Axis (2a)               : 8.10       arcmin                   2a = 486.00 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : 2b =  3.50      arcmin              2b = 210.00 arcsec 
Uncertainty                   : ...                                 ...
Axis Ratio                    : ...                                 b/a = 0.43
Uncertainty                   : ...                                 ...
Ellipticity                   : ...                                 1 - b/a = 0.57
Uncertainty                   : ...                                 ...
Eccentricity                  : ...                                 [(a/b)2-1]/[(a/b)2+1] = 0.69
Uncertainty                   : ...                                 ...
Cos-1(b/a)                    : ...                                 64 deg
Position Angle [Equinox]      : 165    deg [B1950]                  165 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          : 081100.         +491300.    (B1950)
Qualifiers                    : From new, raw data
NED Comment                   :                                         

No. 2 Published Units: Homogenized Units: Reference Code : 1962MCG1..C...0000V Published Object Name : MCG +08-15-054 Frequency Targeted : POSS1 103a-O Major Axis (2a) : 1.00 arcmin 2a = 60.00 arcsec Uncertainty : ... ... Minor Axis (2b) : 2b = 0.50 arcmin 2b = 30.00 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.50 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.50 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.60 Uncertainty : ... ... Cos-1(b/a) : ... 60 deg Position Angle [Equinox] : ... ... Uncertainty : ... ... Significance : No uncertainty reported Diameter Reference Level : 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 : 081106 +4912 (B1950) Qualifiers : From new, raw data NED Comment :
No. 3 Published Units: Homogenized Units: Reference Code : 1962MCG1..C...0000V Published Object Name : MCG +08-15-054 Frequency Targeted : POSS1 103a-O Major Axis (2a) : 6.00 arcmin 2a = 360.00 arcsec Uncertainty : ... ... Minor Axis (2b) : 2b = 3.00 arcmin 2b = 180.00 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.50 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.50 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.60 Uncertainty : ... ... Cos-1(b/a) : ... 60 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 : 081106 +4912 (B1950) Qualifiers : From new, raw data NED Comment :
No. 4 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : UGC 04284 Frequency Targeted : RC3 D_25, R_25 (blue) Major Axis (2a) : log(2a) + 1 = 1.80 2a = 378.60 arcsec Uncertainty : 0.02 17.80 arcsec Minor Axis (2b) : ... 2b = 189.68 arcsec Uncertainty : ... ... Axis Ratio : log(a/b) = 0.30 b/a = 0.50 Uncertainty : 0.03 0.04 Ellipticity : ... 1 - b/a = 0.50 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.60 Uncertainty : ... ... Cos-1(b/a) : ... 60 deg Position Angle [Equinox] : 165 deg [J2000] 165 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 : 081440.3 +490344. (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 04284 Frequency Targeted : RC3 A_e (Johnson B) Major Axis (2a) : log(2a) + 1 = 1.30 2a = 119.70 arcsec Uncertainty : 0.02 5.60 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 : 081440.3 +490344. (J2000) Qualifiers : From new, raw data NED Comment : From magnitude-aperture curves.
No. 6 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : UGC 04284 Frequency Targeted : RC3 D_0 (blue) Major Axis (2a) : log(2a) + 1 = 1.82 2a = 396.40 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 : 081440.3 +490344. (J2000) Qualifiers : Homogenized from previously published data NED Comment : Extinction and inclination corrected.
No. 7 Published Units: Homogenized Units: Reference Code : 2003AJ....125..525J Published Object Name : NGC 2541 Frequency Targeted : K_s (LGA/2MASS isophotal) Major Axis (2a) : a = 38.5 arcsec 2a = 77.00 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 36.19 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.470 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] : -5.0 deg [J2000] 175 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 : 123.666969 49.061440 (J2000) Qualifiers : From new, raw data NED Comment :
No. 8 Published Units: Homogenized Units: Reference Code : 2003AJ....125..525J Published Object Name : NGC 2541 Frequency Targeted : K_s (LGA/2MASS "total") Major Axis (2a) : a = 75.2 arcsec 2a = 150.40 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 70.69 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.470 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] : -5.0 deg [J2000] 175 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 : 123.666969 49.061440 (J2000) Qualifiers : From new, raw data NED Comment :
No. 9 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J081440.11+490342.1 Frequency Targeted : r (SDSS Isophotal) Major Axis (2a) : a = 81.19 arcsec 2a = 162.38 arcsec Uncertainty : ... ... Minor Axis (2b) : b = 36.03 arcsec 2b = 72.06 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.44 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.56 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.67 Uncertainty : ... ... Cos-1(b/a) : ... 64 deg Position Angle [Equinox] : 176.5 deg [J2000] 177 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 : 123.6671478047 49.0617086757 (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 J081440.11+490342.1 Frequency Targeted : r (SDSS Petrosian) Major Axis (2a) : a = 25.17 arcsec 2a = 50.34 arcsec Uncertainty : 8.779 arcsec 17.56 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 : 123.6671478047 49.0617086757 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment :
No. 11 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J081440.11+490342.1 Frequency Targeted : r (SDSS deVaucouleurs) Major Axis (2a) : a = 11.7485 arcsec 2a = 23.50 arcsec Uncertainty : 0.208 arcsec 0.42 arcsec Minor Axis (2b) : ... 2b = 22.20 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.945 b/a = 0.94 Uncertainty : 0.009 0.01 Ellipticity : ... 1 - b/a = 0.06 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.06 Uncertainty : ... ... Cos-1(b/a) : ... 19 deg Position Angle [Equinox] : 172.9 deg [J2000] 173 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 : 123.6671478047 49.0617086757 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment : Effective (half-light) radius
No. 12 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J081440.11+490342.1 Frequency Targeted : r (SDSS Exponential) Major Axis (2a) : a = 9.0466 arcsec 2a = 18.09 arcsec Uncertainty : 0.053 arcsec 0.11 arcsec Minor Axis (2b) : ... 2b = 9.91 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.548 b/a = 0.55 Uncertainty : 0.004 0.00 Ellipticity : ... 1 - b/a = 0.45 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.54 Uncertainty : ... ... Cos-1(b/a) : ... 57 deg Position Angle [Equinox] : 173.2 deg [J2000] 173 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 : 123.6671478047 49.0617086757 (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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