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Date and Time of the Query: 2019-05-26 T08:39:35 PDT
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Diameter data point(s) for object NGC 4839

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
4.00 arcmin 1.80 arcmin ... ... ... ... 65
[B1950]
About 25.0 B-mag arcsec^-2^ 7.40E+14 240.00 ... 0.45 0.55 0.66 63 65
[J2000]
2 POSS1 103a-O
1964MCG2..C...0000V
0.60 arcmin 0.45 arcmin ... ... ... ... ... Very high surface brightness 7.40E+14 36.00 ... 0.75 0.25 0.28 41 ...
3 RC3 D_25, R_25 (blue)
1991RC3.9.C...0000d
1.60 log(2a) + 1 ... ... 0.31
log(a/b)
0.06 ... ... 65
[J2000]
25.0 B-mag arcsec^-2^ 6.81E+14 238.90 35.40 0.49 0.51 0.61 61 65
[J2000]
4 RC3 A_e (Johnson B)
1991RC3.9.C...0000d
1.16 log(2a) + 1 ... ... ... 0.04 ... ... ... ... 6.81E+14 86.70 8.40 ... ... ... ... ...
5 RC3 D_0 (blue)
1991RC3.9.C...0000d
1.51 log(2a) + 1 ... ... ... ... ... ... ... 25.0 B-mag arcsec^-2^ 6.81E+14 194.20 ... ... ... ... ... ...
6 K_s (LGA/2MASS isophotal)
2003AJ....125..525J
43.3 (a) arcsec ... ... 0.700 (b/a) ... ... ... 70.0
[J2000]
20.0 K-mag arcsec^-2^ 1.38E+14 86.60 ... 0.70 0.30 0.34 46 70
[J2000]
7 K_s (LGA/2MASS "total")
2003AJ....125..525J
95.1 (a) arcsec ... ... 0.700 (b/a) ... ... ... 70.0
[J2000]
Diameter for "total" magnitude 1.38E+14 190.20 ... 0.70 0.30 0.34 46 70
[J2000]
8 r (SDSS Isophotal)
2007SDSS6.C...0000:
87.93 (a) arcsec 31.15 arcsec ... ... ... ... 66.0
[J2000]
25.0 mag arcsec^-2^ 4.77E+14 175.87 ... 0.35 0.65 0.78 69 66
[J2000]
9 r (SDSS Petrosian)
2007SDSS6.C...0000:
11.73 (a) arcsec ... ... ... 0.708 ... ... ... ... 4.77E+14 23.45 1.42 ... ... ... ... ...
10 r (SDSS deVaucouleurs)
2007SDSS6.C...0000:
7.8662 (a) arcsec ... ... 0.593 (b/a) 0.036 ... ... 62.1
[J2000]
... 4.77E+14 15.73 0.07 0.59 0.41 0.48 54 62
[J2000]
11 r (SDSS Exponential)
2007SDSS6.C...0000:
4.4499 (a) arcsec ... ... 0.663 (b/a) 0.015 ... ... 61.8
[J2000]
... 4.77E+14 8.90 0.03 0.66 0.34 0.39 48 62
[J2000]


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 1973UGC...C...0000N
Published Object Name         : UGC 08070                     
Frequency Targeted            : POSS1 103a-O                  
Major Axis (2a)               : 4.00       arcmin                   2a = 240.00 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : 2b =  1.80      arcmin              2b = 108.00 arcsec 
Uncertainty                   : ...                                 ...
Axis Ratio                    : ...                                 b/a = 0.45
Uncertainty                   : ...                                 ...
Ellipticity                   : ...                                 1 - b/a = 0.55
Uncertainty                   : ...                                 ...
Eccentricity                  : ...                                 [(a/b)2-1]/[(a/b)2+1] = 0.66
Uncertainty                   : ...                                 ...
Cos-1(b/a)                    : ...                                 63 deg
Position Angle [Equinox]      :  65    deg [B1950]                  65 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          : 125500.         +274600.    (B1950)
Qualifiers                    : From new, raw data
NED Comment                   : Diameters flagged uncertain.            

No. 2 Published Units: Homogenized Units: Reference Code : 1964MCG2..C...0000V Published Object Name : MCG +05-31-025 Frequency Targeted : POSS1 103a-O Major Axis (2a) : 0.60 arcmin 2a = 36.00 arcsec Uncertainty : ... ... Minor Axis (2b) : 2b = 0.45 arcmin 2b = 27.00 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 : 125500 +2746 (B1950) Qualifiers : From new, raw data NED Comment :
No. 3 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : UGC 08070 Frequency Targeted : RC3 D_25, R_25 (blue) Major Axis (2a) : log(2a) + 1 = 1.60 2a = 238.90 arcsec Uncertainty : 0.06 35.40 arcsec Minor Axis (2b) : ... 2b = 117.06 arcsec Uncertainty : ... ... Axis Ratio : log(a/b) = 0.31 b/a = 0.49 Uncertainty : 0.06 0.07 Ellipticity : ... 1 - b/a = 0.51 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.61 Uncertainty : ... ... Cos-1(b/a) : ... 61 deg Position Angle [Equinox] : 65 deg [J2000] 65 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 : 125724.3 +272954. (J2000) Qualifiers : Homogenized from previously published data NED Comment :
No. 4 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : UGC 08070 Frequency Targeted : RC3 A_e (Johnson B) Major Axis (2a) : log(2a) + 1 = 1.16 2a = 86.70 arcsec Uncertainty : 0.04 8.40 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 : 125724.3 +272954. (J2000) Qualifiers : From new, raw data NED Comment : From magnitude-aperture curves.
No. 5 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : UGC 08070 Frequency Targeted : RC3 D_0 (blue) Major Axis (2a) : log(2a) + 1 = 1.51 2a = 194.20 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 : 125724.3 +272954. (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 4839 Frequency Targeted : K_s (LGA/2MASS isophotal) Major Axis (2a) : a = 43.3 arcsec 2a = 86.60 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 60.62 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.700 b/a = 0.70 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.30 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.34 Uncertainty : ... ... Cos-1(b/a) : ... 46 deg Position Angle [Equinox] : 70.0 deg [J2000] 70 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 : 194.351471 27.497721 (J2000) Qualifiers : From new, raw data NED Comment :
No. 7 Published Units: Homogenized Units: Reference Code : 2003AJ....125..525J Published Object Name : NGC 4839 Frequency Targeted : K_s (LGA/2MASS "total") Major Axis (2a) : a = 95.1 arcsec 2a = 190.20 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 133.14 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.700 b/a = 0.70 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.30 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.34 Uncertainty : ... ... Cos-1(b/a) : ... 46 deg Position Angle [Equinox] : 70.0 deg [J2000] 70 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 : 194.351471 27.497721 (J2000) Qualifiers : From new, raw data NED Comment :
No. 8 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J125724.36+272952.1 Frequency Targeted : r (SDSS Isophotal) Major Axis (2a) : a = 87.93 arcsec 2a = 175.87 arcsec Uncertainty : ... ... Minor Axis (2b) : b = 31.15 arcsec 2b = 62.30 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.35 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.65 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.78 Uncertainty : ... ... Cos-1(b/a) : ... 69 deg Position Angle [Equinox] : 66.0 deg [J2000] 66 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 : 194.3515060325 27.4978180339 (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 J125724.36+272952.1 Frequency Targeted : r (SDSS Petrosian) Major Axis (2a) : a = 11.73 arcsec 2a = 23.45 arcsec Uncertainty : 0.708 arcsec 1.42 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 : 194.3515060325 27.4978180339 (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 J125724.36+272952.1 Frequency Targeted : r (SDSS deVaucouleurs) Major Axis (2a) : a = 7.8662 arcsec 2a = 15.73 arcsec Uncertainty : 0.036 arcsec 0.07 arcsec Minor Axis (2b) : ... 2b = 9.33 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.593 b/a = 0.59 Uncertainty : 0.003 0.00 Ellipticity : ... 1 - b/a = 0.41 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.48 Uncertainty : ... ... Cos-1(b/a) : ... 54 deg Position Angle [Equinox] : 62.1 deg [J2000] 62 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 : 194.3515060325 27.4978180339 (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 J125724.36+272952.1 Frequency Targeted : r (SDSS Exponential) Major Axis (2a) : a = 4.4499 arcsec 2a = 8.90 arcsec Uncertainty : 0.015 arcsec 0.03 arcsec Minor Axis (2b) : ... 2b = 5.90 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.663 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) : ... 48 deg Position Angle [Equinox] : 61.8 deg [J2000] 62 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 : 194.3515060325 27.4978180339 (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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