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Date and Time of the Query: 2019-03-26 T17:29:13 PDT
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Diameter data point(s) for object NGC 7138

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
1.10 arcmin 0.50 arcmin ... ... ... ... 177
[B1950]
About 25.0 B-mag arcsec^-2^ 7.40E+14 66.00 ... 0.46 0.54 0.66 63 177
[J2000]
2 K_s (2MASS isophotal)
20032MASX.C.......:
27.8 (a) arcsec ... ... 0.520 (b/a) ... ... ... -5
[J2000]
20.0 K-mag arcsec^-2^ 1.38E+14 55.60 ... 0.52 0.48 0.57 59 175
[J2000]
3 K_s (2MASS "total")
20032MASX.C.......:
42.7 (a) arcsec ... ... 0.520 (b/a) ... ... ... -5
[J2000]
Diameter for "total" magnitude 1.38E+14 85.30 ... 0.52 0.48 0.57 59 175
[J2000]
4 POSS1 103a-O
1963MCG3..C...0000V
0.55 arcmin 0.30 arcmin ... ... ... ... ... High surface brightness 7.40E+14 33.00 ... 0.55 0.45 0.54 57 ...
5 POSS1 103a-O
1963MCG3..C...0000V
1.20 arcmin 0.50 arcmin ... ... ... ... ... Moderate surface brightness 7.40E+14 72.00 ... 0.42 0.58 0.70 65 ...
6 RC3 D_25, R_25 (blue)
1991RC3.9.C...0000d
1.06 log(2a) + 1 ... ... 0.34
log(a/b)
0.05 ... ... 177
[J2000]
25.0 B-mag arcsec^-2^ 6.81E+14 68.90 8.40 0.46 0.54 0.65 63 177
[J2000]
7 RC3 D_0 (blue)
1991RC3.9.C...0000d
1.09 log(2a) + 1 ... ... ... ... ... ... ... 25.0 B-mag arcsec^-2^ 6.81E+14 73.80 ... ... ... ... ... ...
8 r (SDSS Isophotal)
2007SDSS6.C...0000:
39.46 (a) arcsec 19.59 arcsec ... ... ... ... 175.8
[J2000]
25.0 mag arcsec^-2^ 4.77E+14 78.92 ... 0.50 0.50 0.60 60 176
[J2000]
9 r (SDSS Petrosian)
2007SDSS6.C...0000:
8.54 (a) arcsec ... ... ... 0.399 ... ... ... ... 4.77E+14 17.08 0.80 ... ... ... ... ...
10 r (SDSS deVaucouleurs)
2007SDSS6.C...0000:
7.4929 (a) arcsec ... ... 0.565 (b/a) 0.060 ... ... 0.5
[J2000]
... 4.77E+14 14.99 0.12 0.56 0.44 0.52 56 1
[J2000]
11 r (SDSS Exponential)
2007SDSS6.C...0000:
4.5072 (a) arcsec ... ... 0.511 (b/a) 0.017 ... ... 179.7
[J2000]
... 4.77E+14 9.01 0.04 0.51 0.49 0.59 59 180
[J2000]


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 1973UGC...C...0000N
Published Object Name         : UGC 11817                     
Frequency Targeted            : POSS1 103a-O                  
Major Axis (2a)               : 1.10       arcmin                   2a = 66.00 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : 2b =  0.50      arcmin              2b = 30.00 arcsec 
Uncertainty                   : ...                                 ...
Axis Ratio                    : ...                                 b/a = 0.46
Uncertainty                   : ...                                 ...
Ellipticity                   : ...                                 1 - b/a = 0.54
Uncertainty                   : ...                                 ...
Eccentricity                  : ...                                 [(a/b)2-1]/[(a/b)2+1] = 0.66
Uncertainty                   : ...                                 ...
Cos-1(b/a)                    : ...                                 63 deg
Position Angle [Equinox]      : 177    deg [B1950]                  177 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          : 214636.         +121600.    (B1950)
Qualifiers                    : From new, raw data
NED Comment                   :                                         

No. 2 Published Units: Homogenized Units: Reference Code : 20032MASX.C.......: Published Object Name : 2MASX J21490109+1230516 Frequency Targeted : K_s (2MASS isophotal) Major Axis (2a) : a = 27.8 arcsec 2a = 55.60 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 28.91 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.520 b/a = 0.52 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.48 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.57 Uncertainty : ... ... Cos-1(b/a) : ... 59 deg Position Angle [Equinox] : -5 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 : 327.254578 12.514287 (J2000) Qualifiers : From new, raw data NED Comment :
No. 3 Published Units: Homogenized Units: Reference Code : 20032MASX.C.......: Published Object Name : 2MASX J21490109+1230516 Frequency Targeted : K_s (2MASS "total") Major Axis (2a) : a = 42.7 arcsec 2a = 85.30 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 44.36 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.520 b/a = 0.52 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.48 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.57 Uncertainty : ... ... Cos-1(b/a) : ... 59 deg Position Angle [Equinox] : -5 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 : 327.254578 12.514287 (J2000) Qualifiers : From new, raw data NED Comment :
No. 4 Published Units: Homogenized Units: Reference Code : 1963MCG3..C...0000V Published Object Name : MCG +02-55-014 Frequency Targeted : POSS1 103a-O Major Axis (2a) : 0.55 arcmin 2a = 33.00 arcsec Uncertainty : ... ... Minor Axis (2b) : 2b = 0.30 arcmin 2b = 18.00 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.55 Uncertainty : ... ... 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] : ... ... 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 : 214636 +1216 (B1950) Qualifiers : From new, raw data NED Comment :
No. 5 Published Units: Homogenized Units: Reference Code : 1963MCG3..C...0000V Published Object Name : MCG +02-55-014 Frequency Targeted : POSS1 103a-O Major Axis (2a) : 1.20 arcmin 2a = 72.00 arcsec Uncertainty : ... ... Minor Axis (2b) : 2b = 0.50 arcmin 2b = 30.00 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.42 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.58 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.70 Uncertainty : ... ... Cos-1(b/a) : ... 65 deg Position Angle [Equinox] : ... ... Uncertainty : ... ... Significance : No uncertainty reported Diameter Reference Level : Moderate 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 : 214636 +1216 (B1950) Qualifiers : From new, raw data NED Comment :
No. 6 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : UGC 11817 Frequency Targeted : RC3 D_25, R_25 (blue) Major Axis (2a) : log(2a) + 1 = 1.06 2a = 68.90 arcsec Uncertainty : 0.05 8.40 arcsec Minor Axis (2b) : ... 2b = 31.49 arcsec Uncertainty : ... ... Axis Ratio : log(a/b) = 0.34 b/a = 0.46 Uncertainty : 0.04 0.04 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] : 177 deg [J2000] 177 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 : 214901.1 +123040. (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 11817 Frequency Targeted : RC3 D_0 (blue) Major Axis (2a) : log(2a) + 1 = 1.09 2a = 73.80 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 : 214901.1 +123040. (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 J214901.08+123051.1 Frequency Targeted : r (SDSS Isophotal) Major Axis (2a) : a = 39.46 arcsec 2a = 78.92 arcsec Uncertainty : ... ... Minor Axis (2b) : b = 19.59 arcsec 2b = 39.18 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] : 175.8 deg [J2000] 176 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 : 327.2545377204 12.5142188446 (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 J214901.08+123051.1 Frequency Targeted : r (SDSS Petrosian) Major Axis (2a) : a = 8.54 arcsec 2a = 17.08 arcsec Uncertainty : 0.399 arcsec 0.80 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 : 327.2545377204 12.5142188446 (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 J214901.08+123051.1 Frequency Targeted : r (SDSS deVaucouleurs) Major Axis (2a) : a = 7.4929 arcsec 2a = 14.99 arcsec Uncertainty : 0.060 arcsec 0.12 arcsec Minor Axis (2b) : ... 2b = 8.47 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.565 b/a = 0.56 Uncertainty : 0.003 0.00 Ellipticity : ... 1 - b/a = 0.44 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.52 Uncertainty : ... ... Cos-1(b/a) : ... 56 deg Position Angle [Equinox] : 0.5 deg [J2000] 1 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 : 327.2545377204 12.5142188446 (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 J214901.08+123051.1 Frequency Targeted : r (SDSS Exponential) Major Axis (2a) : a = 4.5072 arcsec 2a = 9.01 arcsec Uncertainty : 0.017 arcsec 0.04 arcsec Minor Axis (2b) : ... 2b = 4.61 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.511 b/a = 0.51 Uncertainty : 0.002 0.00 Ellipticity : ... 1 - b/a = 0.49 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.59 Uncertainty : ... ... Cos-1(b/a) : ... 59 deg Position Angle [Equinox] : 179.7 deg [J2000] 180 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 : 327.2545377204 12.5142188446 (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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