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Date and Time of the Query: 2019-07-18 T19:12:28 PDT
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Diameter data point(s) for object NGC 6977

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 K_s (2MASS isophotal)
20032MASX.C.......:
28.1 (a) arcsec ... ... 0.820 (b/a) ... ... ... 60
[J2000]
20.0 K-mag arcsec^-2^ 1.38E+14 56.20 ... 0.82 0.18 0.20 35 60
[J2000]
2 K_s (2MASS "total")
20032MASX.C.......:
48.4 (a) arcsec ... ... 0.820 (b/a) ... ... ... 60
[J2000]
Diameter for "total" magnitude 1.38E+14 96.80 ... 0.82 0.18 0.20 35 60
[J2000]
3 POSS1 103a-O
1963MCG3..C...0000V
0.60 arcmin 0.40 arcmin ... ... ... ... ... High surface brightness 7.40E+14 36.00 ... 0.67 0.33 0.38 48 ...
4 POSS1 103a-O
1963MCG3..C...0000V
1.10 arcmin 0.80 arcmin ... ... ... ... ... Low surface brightness 7.40E+14 66.00 ... 0.73 0.27 0.31 43 ...
5 RC3 D_25, R_25 (blue)
1991RC3.9.C...0000d
1.09 log(2a) + 1 ... ... 0.13
log(a/b)
0.06 ... ... ... 25.0 B-mag arcsec^-2^ 6.81E+14 73.80 10.90 0.74 0.26 0.29 42 ...
6 RC3 D_0 (blue)
1991RC3.9.C...0000d
1.12 log(2a) + 1 ... ... ... ... ... ... ... 25.0 B-mag arcsec^-2^ 6.81E+14 79.10 ... ... ... ... ... ...
7 r (SDSS Isophotal)
2004SDSS2.C...0000:
43.68 (a) arcsec 30.36 arcsec ... ... ... ... 139.9
[J2000]
25.0 mag arcsec^-2^ 4.77E+14 87.36 ... 0.69 0.31 0.35 46 140
[J2000]
8 r (SDSS Petrosian)
2004SDSS2.C...0000:
10.23 (a) arcsec ... ... ... 0.13 ... ... ... ... 4.77E+14 20.47 0.25 ... ... ... ... ...
9 r (SDSS de Vaucouleurs)
2004SDSS2.C...0000:
4.78 (a) arcsec ... ... 1.000 (b/a) 0.03 ... ... 54.1
[J2000]
... 4.77E+14 9.56 0.06 1.00 0.00 0.00 0 54
[J2000]
10 r (SDSS Exponential)
2004SDSS2.C...0000:
4.28 (a) arcsec ... ... 0.917 (b/a) 0.01 ... ... 17.6
[J2000]
... 4.77E+14 8.55 0.03 0.92 0.08 0.09 24 18
[J2000]
11 r (SDSS Isophotal)
2007SDSS6.C...0000:
43.68 (a) arcsec 30.36 arcsec ... ... ... ... 139.9
[J2000]
25.0 mag arcsec^-2^ 4.77E+14 87.36 ... 0.69 0.31 0.35 46 140
[J2000]
12 r (SDSS Petrosian)
2007SDSS6.C...0000:
10.23 (a) arcsec ... ... ... 0.127 ... ... ... ... 4.77E+14 20.47 0.25 ... ... ... ... ...
13 r (SDSS deVaucouleurs)
2007SDSS6.C...0000:
4.7816 (a) arcsec ... ... 1.000 (b/a) 0.031 ... ... 54.1
[J2000]
... 4.77E+14 9.56 0.06 1.00 0.00 0.00 0 54
[J2000]
14 r (SDSS Exponential)
2007SDSS6.C...0000:
4.2768 (a) arcsec ... ... 0.917 (b/a) 0.014 ... ... 17.6
[J2000]
... 4.77E+14 8.55 0.03 0.92 0.08 0.09 24 18
[J2000]


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 20032MASX.C.......:
Published Object Name         : 2MASX J20522971-0544459       
Frequency Targeted            : K_s (2MASS isophotal)         
Major Axis (2a)               : a = 28.1       arcsec               2a = 56.20 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : ...                                 2b = 46.08 arcsec
Uncertainty                   : ...                                 ...
Axis Ratio                    : b/a = 0.820                         b/a = 0.82
Uncertainty                   : ...                                 ...
Ellipticity                   : ...                                 1 - b/a = 0.18
Uncertainty                   : ...                                 ...
Eccentricity                  : ...                                 [(a/b)2-1]/[(a/b)2+1] = 0.20
Uncertainty                   : ...                                 ...
Cos-1(b/a)                    : ...                                 35 deg
Position Angle [Equinox]      :   60   deg [J2000]                  60 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          : 313.123779      -5.746104    (J2000)
Qualifiers                    : From new, raw data
NED Comment                   :                                         

No. 2 Published Units: Homogenized Units: Reference Code : 20032MASX.C.......: Published Object Name : 2MASX J20522971-0544459 Frequency Targeted : K_s (2MASS "total") Major Axis (2a) : a = 48.4 arcsec 2a = 96.80 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 79.38 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.820 b/a = 0.82 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.18 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.20 Uncertainty : ... ... Cos-1(b/a) : ... 35 deg Position Angle [Equinox] : 60 deg [J2000] 60 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 : 313.123779 -5.746104 (J2000) Qualifiers : From new, raw data NED Comment :
No. 3 Published Units: Homogenized Units: Reference Code : 1963MCG3..C...0000V Published Object Name : MCG -01-53-016 Frequency Targeted : POSS1 103a-O Major Axis (2a) : 0.60 arcmin 2a = 36.00 arcsec Uncertainty : ... ... Minor Axis (2b) : 2b = 0.40 arcmin 2b = 24.00 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 : "Inner" diameter Coordinates Targeted : 204954 -0556 (B1950) Qualifiers : From new, raw data NED Comment :
No. 4 Published Units: Homogenized Units: Reference Code : 1963MCG3..C...0000V Published Object Name : MCG -01-53-016 Frequency Targeted : POSS1 103a-O Major Axis (2a) : 1.10 arcmin 2a = 66.00 arcsec Uncertainty : ... ... Minor Axis (2b) : 2b = 0.80 arcmin 2b = 48.00 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.73 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.27 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.31 Uncertainty : ... ... Cos-1(b/a) : ... 43 deg Position Angle [Equinox] : ... ... Uncertainty : ... ... Significance : No uncertainty reported Diameter Reference Level : Low 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 : 204954 -0556 (B1950) Qualifiers : From new, raw data NED Comment :
No. 5 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : MCG -01-53-016 Frequency Targeted : RC3 D_25, R_25 (blue) Major Axis (2a) : log(2a) + 1 = 1.09 2a = 73.80 arcsec Uncertainty : 0.06 10.90 arcsec Minor Axis (2b) : ... 2b = 54.69 arcsec Uncertainty : ... ... Axis Ratio : log(a/b) = 0.13 b/a = 0.74 Uncertainty : 0.05 0.09 Ellipticity : ... 1 - b/a = 0.26 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.29 Uncertainty : ... ... Cos-1(b/a) : ... 42 deg Position Angle [Equinox] : ... ... 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 : 205229.8 -054448. (J2000) Qualifiers : Homogenized from previously published data NED Comment :
No. 6 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : MCG -01-53-016 Frequency Targeted : RC3 D_0 (blue) Major Axis (2a) : log(2a) + 1 = 1.12 2a = 79.10 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 : 205229.8 -054448. (J2000) Qualifiers : Homogenized from previously published data NED Comment : Extinction and inclination corrected.
No. 7 Published Units: Homogenized Units: Reference Code : 2004SDSS2.C...0000: Published Object Name : SDSS J205229.70-054446.0 Frequency Targeted : r (SDSS Isophotal) Major Axis (2a) : a = 43.68 arcsec 2a = 87.36 arcsec Uncertainty : ... ... Minor Axis (2b) : b = 30.36 arcsec 2b = 60.72 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.69 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.31 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.35 Uncertainty : ... ... Cos-1(b/a) : ... 46 deg Position Angle [Equinox] : 139.9 deg [J2000] 140 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 : 313.1237793 -5.7461028 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment :
No. 8 Published Units: Homogenized Units: Reference Code : 2004SDSS2.C...0000: Published Object Name : SDSS J205229.70-054446.0 Frequency Targeted : r (SDSS Petrosian) Major Axis (2a) : a = 10.23 arcsec 2a = 20.47 arcsec Uncertainty : 0.13 arcsec 0.25 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 : 313.1237793 -5.7461028 (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 : 2004SDSS2.C...0000: Published Object Name : SDSS J205229.70-054446.0 Frequency Targeted : r (SDSS de Vaucouleurs) Major Axis (2a) : a = 4.78 arcsec 2a = 9.56 arcsec Uncertainty : 0.03 arcsec 0.06 arcsec Minor Axis (2b) : ... 2b = 9.56 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 1.000 b/a = 1.00 Uncertainty : 0.006 0.01 Ellipticity : ... 1 - b/a = 0.00 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.00 Uncertainty : ... ... Cos-1(b/a) : ... 0 deg Position Angle [Equinox] : 54.1 deg [J2000] 54 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 : 313.1237793 -5.7461028 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment : Effective (half-light) radius
No. 10 Published Units: Homogenized Units: Reference Code : 2004SDSS2.C...0000: Published Object Name : SDSS J205229.70-054446.0 Frequency Targeted : r (SDSS Exponential) Major Axis (2a) : a = 4.28 arcsec 2a = 8.55 arcsec Uncertainty : 0.01 arcsec 0.03 arcsec Minor Axis (2b) : ... 2b = 7.84 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.917 b/a = 0.92 Uncertainty : 0.003 0.00 Ellipticity : ... 1 - b/a = 0.08 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.09 Uncertainty : ... ... Cos-1(b/a) : ... 24 deg Position Angle [Equinox] : 17.6 deg [J2000] 18 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 : 313.1237793 -5.7461028 (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 J205229.70-054445.9 Frequency Targeted : r (SDSS Isophotal) Major Axis (2a) : a = 43.68 arcsec 2a = 87.36 arcsec Uncertainty : ... ... Minor Axis (2b) : b = 30.36 arcsec 2b = 60.72 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.69 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.31 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.35 Uncertainty : ... ... Cos-1(b/a) : ... 46 deg Position Angle [Equinox] : 139.9 deg [J2000] 140 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 : 313.1237742567 -5.7461028709 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment :
No. 12 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J205229.70-054445.9 Frequency Targeted : r (SDSS Petrosian) Major Axis (2a) : a = 10.23 arcsec 2a = 20.47 arcsec Uncertainty : 0.127 arcsec 0.25 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 : 313.1237742567 -5.7461028709 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment :
No. 13 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J205229.70-054445.9 Frequency Targeted : r (SDSS deVaucouleurs) Major Axis (2a) : a = 4.7816 arcsec 2a = 9.56 arcsec Uncertainty : 0.031 arcsec 0.06 arcsec Minor Axis (2b) : ... 2b = 9.56 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 1.000 b/a = 1.00 Uncertainty : 0.006 0.01 Ellipticity : ... 1 - b/a = 0.00 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.00 Uncertainty : ... ... Cos-1(b/a) : ... 0 deg Position Angle [Equinox] : 54.1 deg [J2000] 54 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 : 313.1237742567 -5.7461028709 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment : Effective (half-light) radius
No. 14 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J205229.70-054445.9 Frequency Targeted : r (SDSS Exponential) Major Axis (2a) : a = 4.2768 arcsec 2a = 8.55 arcsec Uncertainty : 0.014 arcsec 0.03 arcsec Minor Axis (2b) : ... 2b = 7.84 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.917 b/a = 0.92 Uncertainty : 0.003 0.00 Ellipticity : ... 1 - b/a = 0.08 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.09 Uncertainty : ... ... Cos-1(b/a) : ... 24 deg Position Angle [Equinox] : 17.6 deg [J2000] 18 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 : 313.1237742567 -5.7461028709 (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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