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Date and Time of the Query: 2019-04-20 T16:06:40 PDT
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Diameter data point(s) for object NGC 2755

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
1.20 arcmin 0.80 arcmin ... ... ... ... 130
[B1950]
About 25.0 B-mag arcsec^-2^ 7.40E+14 72.00 ... 0.67 0.33 0.38 48 130
[J2000]
2 K_s (2MASS isophotal)
20032MASX.C.......:
28.3 (a) arcsec ... ... 0.460 (b/a) ... ... ... -65
[J2000]
20.0 K-mag arcsec^-2^ 1.38E+14 56.60 ... 0.46 0.54 0.65 63 115
[J2000]
3 K_s (2MASS "total")
20032MASX.C.......:
43.5 (a) arcsec ... ... 0.460 (b/a) ... ... ... -65
[J2000]
Diameter for "total" magnitude 1.38E+14 87.00 ... 0.46 0.54 0.65 63 115
[J2000]
4 POSS1 103a-O
1964MCG2..C...0000V
0.40 arcmin 0.30 arcmin ... ... ... ... ... Very high surface brightness 7.40E+14 24.00 ... 0.75 0.25 0.28 41 ...
5 POSS1 103a-O
1964MCG2..C...0000V
1.20 arcmin 0.80 arcmin ... ... ... ... ... High surface brightness 7.40E+14 72.00 ... 0.67 0.33 0.38 48 ...
6 RC3 D_25, R_25 (blue)
1991RC3.9.C...0000d
1.08 log(2a) + 1 ... ... 0.17
log(a/b)
0.06 ... ... 130
[J2000]
25.0 B-mag arcsec^-2^ 6.81E+14 72.10 10.70 0.68 0.32 0.37 47 130
[J2000]
7 RC3 D_0 (blue)
1991RC3.9.C...0000d
1.08 log(2a) + 1 ... ... ... ... ... ... ... 25.0 B-mag arcsec^-2^ 6.81E+14 72.10 ... ... ... ... ... ...
8 r (SDSS Isophotal)
2004SDSS3.C...0000:
33.98 (a) arcsec 20.55 arcsec ... ... ... ... 129.3
[J2000]
25.0 mag arcsec^-2^ 4.77E+14 67.95 ... 0.60 0.40 0.46 53 129
[J2000]
9 r (SDSS Petrosian)
2004SDSS3.C...0000:
8.43 (a) arcsec ... ... ... 0.27 ... ... ... ... 4.77E+14 16.86 0.54 ... ... ... ... ...
10 r (SDSS de Vaucouleurs)
2004SDSS3.C...0000:
6.08 (a) arcsec ... ... 0.761 (b/a) 0.05 ... ... 126.3
[J2000]
... 4.77E+14 12.16 0.10 0.76 0.24 0.27 40 126
[J2000]
11 r (SDSS Exponential)
2004SDSS3.C...0000:
4.42 (a) arcsec ... ... 0.662 (b/a) 0.02 ... ... 121.4
[J2000]
... 4.77E+14 8.84 0.03 0.66 0.34 0.39 49 121
[J2000]


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 1973UGC...C...0000N
Published Object Name         : UGC 04789                     
Frequency Targeted            : POSS1 103a-O                  
Major Axis (2a)               : 1.20       arcmin                   2a = 72.00 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : 2b =  0.80      arcmin              2b = 48.00 arcsec 
Uncertainty                   : ...                                 ...
Axis Ratio                    : ...                                 b/a = 0.67
Uncertainty                   : ...                                 ...
Ellipticity                   : ...                                 1 - b/a = 0.33
Uncertainty                   : ...                                 ...
Eccentricity                  : ...                                 [(a/b)2-1]/[(a/b)2+1] = 0.38
Uncertainty                   : ...                                 ...
Cos-1(b/a)                    : ...                                 48 deg
Position Angle [Equinox]      : 130    deg [B1950]                  130 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          : 090442.         +415500.    (B1950)
Qualifiers                    : From new, raw data
NED Comment                   :                                         

No. 2 Published Units: Homogenized Units: Reference Code : 20032MASX.C.......: Published Object Name : 2MASX J09075831+4142324 Frequency Targeted : K_s (2MASS isophotal) Major Axis (2a) : a = 28.3 arcsec 2a = 56.60 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 26.04 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.460 b/a = 0.46 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.54 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.65 Uncertainty : ... ... Cos-1(b/a) : ... 63 deg Position Angle [Equinox] : -65 deg [J2000] 115 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 : 136.992996 41.708996 (J2000) Qualifiers : From new, raw data NED Comment :
No. 3 Published Units: Homogenized Units: Reference Code : 20032MASX.C.......: Published Object Name : 2MASX J09075831+4142324 Frequency Targeted : K_s (2MASS "total") Major Axis (2a) : a = 43.5 arcsec 2a = 87.00 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 40.02 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.460 b/a = 0.46 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.54 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.65 Uncertainty : ... ... Cos-1(b/a) : ... 63 deg Position Angle [Equinox] : -65 deg [J2000] 115 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 : 136.992996 41.708996 (J2000) Qualifiers : From new, raw data NED Comment :
No. 4 Published Units: Homogenized Units: Reference Code : 1964MCG2..C...0000V Published Object Name : MCG +07-19-034 Frequency Targeted : POSS1 103a-O Major Axis (2a) : 0.40 arcmin 2a = 24.00 arcsec Uncertainty : ... ... Minor Axis (2b) : 2b = 0.30 arcmin 2b = 18.00 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.75 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.25 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.28 Uncertainty : ... ... Cos-1(b/a) : ... 41 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 : 090448 +4153 (B1950) Qualifiers : From new, raw data NED Comment :
No. 5 Published Units: Homogenized Units: Reference Code : 1964MCG2..C...0000V Published Object Name : MCG +07-19-034 Frequency Targeted : POSS1 103a-O Major Axis (2a) : 1.20 arcmin 2a = 72.00 arcsec Uncertainty : ... ... Minor Axis (2b) : 2b = 0.80 arcmin 2b = 48.00 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.67 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.33 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.38 Uncertainty : ... ... Cos-1(b/a) : ... 48 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 : "Outer" diameter Coordinates Targeted : 090448 +4153 (B1950) Qualifiers : From new, raw data NED Comment :
No. 6 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : UGC 04789 Frequency Targeted : RC3 D_25, R_25 (blue) Major Axis (2a) : log(2a) + 1 = 1.08 2a = 72.10 arcsec Uncertainty : 0.06 10.70 arcsec Minor Axis (2b) : ... 2b = 48.74 arcsec Uncertainty : ... ... Axis Ratio : log(a/b) = 0.17 b/a = 0.68 Uncertainty : 0.05 0.08 Ellipticity : ... 1 - b/a = 0.32 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.37 Uncertainty : ... ... Cos-1(b/a) : ... 47 deg Position Angle [Equinox] : 130 deg [J2000] 130 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 : 090758.4 +414237. (J2000) Qualifiers : Homogenized from previously published data NED Comment :
No. 7 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : UGC 04789 Frequency Targeted : RC3 D_0 (blue) Major Axis (2a) : log(2a) + 1 = 1.08 2a = 72.10 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 : 090758.4 +414237. (J2000) Qualifiers : Homogenized from previously published data NED Comment : Extinction and inclination corrected.
No. 8 Published Units: Homogenized Units: Reference Code : 2004SDSS3.C...0000: Published Object Name : SDSS J090758.31+414232.2 Frequency Targeted : r (SDSS Isophotal) Major Axis (2a) : a = 33.98 arcsec 2a = 67.95 arcsec Uncertainty : ... ... Minor Axis (2b) : b = 20.55 arcsec 2b = 41.09 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.60 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.40 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.46 Uncertainty : ... ... Cos-1(b/a) : ... 53 deg Position Angle [Equinox] : 129.3 deg [J2000] 129 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 : 136.9929504 41.7089386 (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 : 2004SDSS3.C...0000: Published Object Name : SDSS J090758.31+414232.2 Frequency Targeted : r (SDSS Petrosian) Major Axis (2a) : a = 8.43 arcsec 2a = 16.86 arcsec Uncertainty : 0.27 arcsec 0.54 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 : 136.9929504 41.7089386 (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 : 2004SDSS3.C...0000: Published Object Name : SDSS J090758.31+414232.2 Frequency Targeted : r (SDSS de Vaucouleurs) Major Axis (2a) : a = 6.08 arcsec 2a = 12.16 arcsec Uncertainty : 0.05 arcsec 0.10 arcsec Minor Axis (2b) : ... 2b = 9.25 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.761 b/a = 0.76 Uncertainty : 0.005 0.01 Ellipticity : ... 1 - b/a = 0.24 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.27 Uncertainty : ... ... Cos-1(b/a) : ... 40 deg Position Angle [Equinox] : 126.3 deg [J2000] 126 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 : 136.9929504 41.7089386 (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 : 2004SDSS3.C...0000: Published Object Name : SDSS J090758.31+414232.2 Frequency Targeted : r (SDSS Exponential) Major Axis (2a) : a = 4.42 arcsec 2a = 8.84 arcsec Uncertainty : 0.02 arcsec 0.03 arcsec Minor Axis (2b) : ... 2b = 5.85 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.662 b/a = 0.66 Uncertainty : 0.003 0.00 Ellipticity : ... 1 - b/a = 0.34 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.39 Uncertainty : ... ... Cos-1(b/a) : ... 49 deg Position Angle [Equinox] : 121.4 deg [J2000] 121 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 : 136.9929504 41.7089386 (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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