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Date and Time of the Query: 2019-05-18 T23:28:04 PDT
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Diameter data point(s) for object NGC 2948

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
1.70 arcmin 0.90 arcmin ... ... ... ... 7
[B1950]
About 25.0 B-mag arcsec^-2^ 7.40E+14 102.00 ... 0.53 0.47 0.56 58 7
[J2000]
2 K_s (2MASS isophotal)
20032MASX.C.......:
31.4 (a) arcsec ... ... 0.660 (b/a) ... ... ... -30
[J2000]
20.0 K-mag arcsec^-2^ 1.38E+14 62.80 ... 0.66 0.34 0.39 49 150
[J2000]
3 K_s (2MASS "total")
20032MASX.C.......:
47.3 (a) arcsec ... ... 0.660 (b/a) ... ... ... -30
[J2000]
Diameter for "total" magnitude 1.38E+14 94.60 ... 0.66 0.34 0.39 49 150
[J2000]
4 POSS1 103a-O
1963MCG3..C...0000V
1.00 arcmin 0.80 arcmin ... ... ... ... ... Intermed. surface brightness 7.40E+14 60.00 ... 0.80 0.20 0.22 37 ...
5 RC3 D_25, R_25 (blue)
1991RC3.9.C...0000d
1.14 log(2a) + 1 ... ... 0.20
log(a/b)
0.05 ... ... 7
[J2000]
25.0 B-mag arcsec^-2^ 6.81E+14 82.80 10.10 0.63 0.37 0.43 51 7
[J2000]
6 RC3 D_0 (blue)
1991RC3.9.C...0000d
1.15 log(2a) + 1 ... ... ... ... ... ... ... 25.0 B-mag arcsec^-2^ 6.81E+14 84.80 ... ... ... ... ... ...
7 r (SDSS Isophotal)
2004SDSS3.C...0000:
54.86 (a) arcsec 26.74 arcsec ... ... ... ... 6.7
[J2000]
25.0 mag arcsec^-2^ 4.77E+14 109.72 ... 0.49 0.51 0.62 61 7
[J2000]
8 r (SDSS Petrosian)
2004SDSS3.C...0000:
12.08 (a) arcsec ... ... ... 0.49 ... ... ... ... 4.77E+14 24.16 0.99 ... ... ... ... ...
9 r (SDSS de Vaucouleurs)
2004SDSS3.C...0000:
7.15 (a) arcsec ... ... 0.698 (b/a) 0.05 ... ... 166.2
[J2000]
... 4.77E+14 14.30 0.09 0.70 0.30 0.34 46 166
[J2000]
10 r (SDSS Exponential)
2004SDSS3.C...0000:
5.46 (a) arcsec ... ... 0.634 (b/a) 0.02 ... ... 168.9
[J2000]
... 4.77E+14 10.93 0.04 0.63 0.37 0.43 51 169
[J2000]
11 r (SDSS Isophotal)
2007SDSS6.C...0000:
54.86 (a) arcsec 26.74 arcsec ... ... ... ... 6.7
[J2000]
25.0 mag arcsec^-2^ 4.77E+14 109.72 ... 0.49 0.51 0.62 61 7
[J2000]
12 r (SDSS Petrosian)
2007SDSS6.C...0000:
12.08 (a) arcsec ... ... ... 0.495 ... ... ... ... 4.77E+14 24.16 0.99 ... ... ... ... ...
13 r (SDSS deVaucouleurs)
2007SDSS6.C...0000:
7.1477 (a) arcsec ... ... 0.698 (b/a) 0.045 ... ... 166.2
[J2000]
... 4.77E+14 14.29 0.09 0.70 0.30 0.34 46 166
[J2000]
14 r (SDSS Exponential)
2007SDSS6.C...0000:
5.4648 (a) arcsec ... ... 0.634 (b/a) 0.018 ... ... 168.9
[J2000]
... 4.77E+14 10.93 0.04 0.63 0.37 0.43 51 169
[J2000]


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 1973UGC...C...0000N
Published Object Name         : UGC 05141                     
Frequency Targeted            : POSS1 103a-O                  
Major Axis (2a)               : 1.70       arcmin                   2a = 102.00 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : 2b =  0.90      arcmin              2b = 54.00 arcsec 
Uncertainty                   : ...                                 ...
Axis Ratio                    : ...                                 b/a = 0.53
Uncertainty                   : ...                                 ...
Ellipticity                   : ...                                 1 - b/a = 0.47
Uncertainty                   : ...                                 ...
Eccentricity                  : ...                                 [(a/b)2-1]/[(a/b)2+1] = 0.56
Uncertainty                   : ...                                 ...
Cos-1(b/a)                    : ...                                 58 deg
Position Angle [Equinox]      :   7    deg [B1950]                  7 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          : 093618.         +071100.    (B1950)
Qualifiers                    : From new, raw data
NED Comment                   :                                         

No. 2 Published Units: Homogenized Units: Reference Code : 20032MASX.C.......: Published Object Name : 2MASX J09385921+0657199 Frequency Targeted : K_s (2MASS isophotal) Major Axis (2a) : a = 31.4 arcsec 2a = 62.80 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 41.45 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.660 b/a = 0.66 Uncertainty : ... ... 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] : -30 deg [J2000] 150 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 : 144.746658 6.955483 (J2000) Qualifiers : From new, raw data NED Comment :
No. 3 Published Units: Homogenized Units: Reference Code : 20032MASX.C.......: Published Object Name : 2MASX J09385921+0657199 Frequency Targeted : K_s (2MASS "total") Major Axis (2a) : a = 47.3 arcsec 2a = 94.60 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 62.44 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.660 b/a = 0.66 Uncertainty : ... ... 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] : -30 deg [J2000] 150 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 : 144.746658 6.955483 (J2000) Qualifiers : From new, raw data NED Comment :
No. 4 Published Units: Homogenized Units: Reference Code : 1963MCG3..C...0000V Published Object Name : MCG +01-25-007 Frequency Targeted : POSS1 103a-O Major Axis (2a) : 1.00 arcmin 2a = 60.00 arcsec Uncertainty : ... ... Minor Axis (2b) : 2b = 0.80 arcmin 2b = 48.00 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.80 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.20 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.22 Uncertainty : ... ... Cos-1(b/a) : ... 37 deg Position Angle [Equinox] : ... ... Uncertainty : ... ... Significance : No uncertainty reported Diameter Reference Level : Intermed. 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 : 093618 +0711 (B1950) Qualifiers : From new, raw data NED Comment :
No. 5 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : UGC 05141 Frequency Targeted : RC3 D_25, R_25 (blue) Major Axis (2a) : log(2a) + 1 = 1.14 2a = 82.80 arcsec Uncertainty : 0.05 10.10 arcsec Minor Axis (2b) : ... 2b = 52.25 arcsec Uncertainty : ... ... Axis Ratio : log(a/b) = 0.20 b/a = 0.63 Uncertainty : 0.05 0.08 Ellipticity : ... 1 - b/a = 0.37 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.43 Uncertainty : ... ... Cos-1(b/a) : ... 51 deg Position Angle [Equinox] : 7 deg [J2000] 7 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 : 093859.2 +065725. (J2000) Qualifiers : Homogenized from previously published data NED Comment :
No. 6 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : UGC 05141 Frequency Targeted : RC3 D_0 (blue) Major Axis (2a) : log(2a) + 1 = 1.15 2a = 84.80 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 : 093859.2 +065725. (J2000) Qualifiers : Homogenized from previously published data NED Comment : Extinction and inclination corrected.
No. 7 Published Units: Homogenized Units: Reference Code : 2004SDSS3.C...0000: Published Object Name : SDSS J093859.19+065719.6 Frequency Targeted : r (SDSS Isophotal) Major Axis (2a) : a = 54.86 arcsec 2a = 109.72 arcsec Uncertainty : ... ... Minor Axis (2b) : b = 26.74 arcsec 2b = 53.48 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.49 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.51 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.62 Uncertainty : ... ... Cos-1(b/a) : ... 61 deg Position Angle [Equinox] : 6.7 deg [J2000] 7 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 : 144.7466278 6.9554420 (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 : 2004SDSS3.C...0000: Published Object Name : SDSS J093859.19+065719.6 Frequency Targeted : r (SDSS Petrosian) Major Axis (2a) : a = 12.08 arcsec 2a = 24.16 arcsec Uncertainty : 0.49 arcsec 0.99 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 : 144.7466278 6.9554420 (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 J093859.19+065719.6 Frequency Targeted : r (SDSS de Vaucouleurs) Major Axis (2a) : a = 7.15 arcsec 2a = 14.30 arcsec Uncertainty : 0.05 arcsec 0.09 arcsec Minor Axis (2b) : ... 2b = 9.98 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.698 b/a = 0.70 Uncertainty : 0.004 0.00 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] : 166.2 deg [J2000] 166 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 : 144.7466278 6.9554420 (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 : 2004SDSS3.C...0000: Published Object Name : SDSS J093859.19+065719.6 Frequency Targeted : r (SDSS Exponential) Major Axis (2a) : a = 5.46 arcsec 2a = 10.93 arcsec Uncertainty : 0.02 arcsec 0.04 arcsec Minor Axis (2b) : ... 2b = 6.93 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.634 b/a = 0.63 Uncertainty : 0.003 0.00 Ellipticity : ... 1 - b/a = 0.37 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.43 Uncertainty : ... ... Cos-1(b/a) : ... 51 deg Position Angle [Equinox] : 168.9 deg [J2000] 169 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 : 144.7466278 6.9554420 (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 J093859.18+065719.5 Frequency Targeted : r (SDSS Isophotal) Major Axis (2a) : a = 54.86 arcsec 2a = 109.72 arcsec Uncertainty : ... ... Minor Axis (2b) : b = 26.74 arcsec 2b = 53.48 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.49 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.51 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.62 Uncertainty : ... ... Cos-1(b/a) : ... 61 deg Position Angle [Equinox] : 6.7 deg [J2000] 7 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 : 144.7466202034 6.9554421488 (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 J093859.18+065719.5 Frequency Targeted : r (SDSS Petrosian) Major Axis (2a) : a = 12.08 arcsec 2a = 24.16 arcsec Uncertainty : 0.495 arcsec 0.99 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 : 144.7466202034 6.9554421488 (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 J093859.18+065719.5 Frequency Targeted : r (SDSS deVaucouleurs) Major Axis (2a) : a = 7.1477 arcsec 2a = 14.29 arcsec Uncertainty : 0.045 arcsec 0.09 arcsec Minor Axis (2b) : ... 2b = 9.98 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.698 b/a = 0.70 Uncertainty : 0.004 0.00 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] : 166.2 deg [J2000] 166 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 : 144.7466202034 6.9554421488 (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 J093859.18+065719.5 Frequency Targeted : r (SDSS Exponential) Major Axis (2a) : a = 5.4648 arcsec 2a = 10.93 arcsec Uncertainty : 0.018 arcsec 0.04 arcsec Minor Axis (2b) : ... 2b = 6.93 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.634 b/a = 0.63 Uncertainty : 0.003 0.00 Ellipticity : ... 1 - b/a = 0.37 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.43 Uncertainty : ... ... Cos-1(b/a) : ... 51 deg Position Angle [Equinox] : 168.9 deg [J2000] 169 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 : 144.7466202034 6.9554421488 (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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