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Date and Time of the Query: 2019-04-23 T15:53:55 PDT
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Diameter data point(s) for object NGC 2994

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 0.90 arcmin ... ... ... ... 125
[B1950]
About 25.0 B-mag arcsec^-2^ 7.40E+14 72.00 ... 0.75 0.25 0.28 41 125
[J2000]
2 K_s (2MASS isophotal)
20032MASX.C.......:
29.6 (a) arcsec ... ... 0.620 (b/a) ... ... ... -60
[J2000]
20.0 K-mag arcsec^-2^ 1.38E+14 59.20 ... 0.62 0.38 0.44 52 120
[J2000]
3 K_s (2MASS "total")
20032MASX.C.......:
45.2 (a) arcsec ... ... 0.620 (b/a) ... ... ... -60
[J2000]
Diameter for "total" magnitude 1.38E+14 90.40 ... 0.62 0.38 0.44 52 120
[J2000]
4 POSS1 103a-O
1964MCG2..C...0000V
0.70 arcmin 0.45 arcmin ... ... ... ... ... Very high surface brightness 7.40E+14 42.00 ... 0.64 0.36 0.41 50 ...
5 RC3 D_25, R_25 (blue)
1991RC3.9.C...0000d
1.12 log(2a) + 1 ... ... 0.12
log(a/b)
0.04 ... ... 125
[J2000]
25.0 B-mag arcsec^-2^ 6.81E+14 79.10 7.60 0.76 0.24 0.27 41 125
[J2000]
6 RC3 A_e (Johnson B)
1991RC3.9.C...0000d
0.66 log(2a) + 1 ... ... ... 0.03 ... ... ... ... 6.81E+14 27.40 2.00 ... ... ... ... ...
7 RC3 D_0 (blue)
1991RC3.9.C...0000d
1.11 log(2a) + 1 ... ... ... ... ... ... ... 25.0 B-mag arcsec^-2^ 6.81E+14 77.30 ... ... ... ... ... ...
8 r (SDSS Isophotal)
2007SDSS6.C...0000:
41.11 (a) arcsec 26.65 arcsec ... ... ... ... 122.6
[J2000]
25.0 mag arcsec^-2^ 4.77E+14 82.22 ... 0.65 0.35 0.41 50 123
[J2000]
9 r (SDSS Petrosian)
2007SDSS6.C...0000:
8.84 (a) arcsec ... ... ... 0.238 ... ... ... ... 4.77E+14 17.68 0.48 ... ... ... ... ...
10 r (SDSS deVaucouleurs)
2007SDSS6.C...0000:
7.1020 (a) arcsec ... ... 0.691 (b/a) 0.041 ... ... 122.0
[J2000]
... 4.77E+14 14.20 0.08 0.69 0.31 0.35 46 122
[J2000]
11 r (SDSS Exponential)
2007SDSS6.C...0000:
4.6542 (a) arcsec ... ... 0.625 (b/a) 0.015 ... ... 122.0
[J2000]
... 4.77E+14 9.31 0.03 0.62 0.38 0.44 51 122
[J2000]


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 1973UGC...C...0000N
Published Object Name         : UGC 05239                     
Frequency Targeted            : POSS1 103a-O                  
Major Axis (2a)               : 1.20       arcmin                   2a = 72.00 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : 2b =  0.90      arcmin              2b = 54.00 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]      : 125    deg [B1950]                  125 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          : 094430.         +222000.    (B1950)
Qualifiers                    : From new, raw data
NED Comment                   : Diameters flagged uncertain.            

No. 2 Published Units: Homogenized Units: Reference Code : 20032MASX.C.......: Published Object Name : 2MASX J09471608+2205221 Frequency Targeted : K_s (2MASS isophotal) Major Axis (2a) : a = 29.6 arcsec 2a = 59.20 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 36.70 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.620 b/a = 0.62 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.38 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.44 Uncertainty : ... ... Cos-1(b/a) : ... 52 deg Position Angle [Equinox] : -60 deg [J2000] 120 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 : 146.817047 22.089478 (J2000) Qualifiers : From new, raw data NED Comment :
No. 3 Published Units: Homogenized Units: Reference Code : 20032MASX.C.......: Published Object Name : 2MASX J09471608+2205221 Frequency Targeted : K_s (2MASS "total") Major Axis (2a) : a = 45.2 arcsec 2a = 90.40 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 56.05 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.620 b/a = 0.62 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.38 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.44 Uncertainty : ... ... Cos-1(b/a) : ... 52 deg Position Angle [Equinox] : -60 deg [J2000] 120 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 : 146.817047 22.089478 (J2000) Qualifiers : From new, raw data NED Comment :
No. 4 Published Units: Homogenized Units: Reference Code : 1964MCG2..C...0000V Published Object Name : MCG +04-23-035 Frequency Targeted : POSS1 103a-O Major Axis (2a) : 0.70 arcmin 2a = 42.00 arcsec Uncertainty : ... ... Minor Axis (2b) : 2b = 0.45 arcmin 2b = 27.00 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.64 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.36 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.41 Uncertainty : ... ... Cos-1(b/a) : ... 50 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 : 094412 +2219 (B1950) Qualifiers : From new, raw data NED Comment :
No. 5 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : UGC 05239 Frequency Targeted : RC3 D_25, R_25 (blue) Major Axis (2a) : log(2a) + 1 = 1.12 2a = 79.10 arcsec Uncertainty : 0.04 7.60 arcsec Minor Axis (2b) : ... 2b = 60.04 arcsec Uncertainty : ... ... Axis Ratio : log(a/b) = 0.12 b/a = 0.76 Uncertainty : 0.08 0.15 Ellipticity : ... 1 - b/a = 0.24 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.27 Uncertainty : ... ... Cos-1(b/a) : ... 41 deg Position Angle [Equinox] : 125 deg [J2000] 125 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 : 094716.3 +220523. (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 05239 Frequency Targeted : RC3 A_e (Johnson B) Major Axis (2a) : log(2a) + 1 = 0.66 2a = 27.40 arcsec Uncertainty : 0.03 2.00 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 : 094716.3 +220523. (J2000) Qualifiers : From new, raw data NED Comment : From magnitude-aperture curves.
No. 7 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : UGC 05239 Frequency Targeted : RC3 D_0 (blue) Major Axis (2a) : log(2a) + 1 = 1.11 2a = 77.30 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 : 094716.3 +220523. (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 J094716.11+220522.1 Frequency Targeted : r (SDSS Isophotal) Major Axis (2a) : a = 41.11 arcsec 2a = 82.22 arcsec Uncertainty : ... ... Minor Axis (2b) : b = 26.65 arcsec 2b = 53.30 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.65 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.35 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.41 Uncertainty : ... ... Cos-1(b/a) : ... 50 deg Position Angle [Equinox] : 122.6 deg [J2000] 123 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 : 146.8171370899 22.0894991046 (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 J094716.11+220522.1 Frequency Targeted : r (SDSS Petrosian) Major Axis (2a) : a = 8.84 arcsec 2a = 17.68 arcsec Uncertainty : 0.238 arcsec 0.48 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 : 146.8171370899 22.0894991046 (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 J094716.11+220522.1 Frequency Targeted : r (SDSS deVaucouleurs) Major Axis (2a) : a = 7.1020 arcsec 2a = 14.20 arcsec Uncertainty : 0.041 arcsec 0.08 arcsec Minor Axis (2b) : ... 2b = 9.81 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.691 b/a = 0.69 Uncertainty : 0.004 0.00 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] : 122.0 deg [J2000] 122 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 : 146.8171370899 22.0894991046 (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 J094716.11+220522.1 Frequency Targeted : r (SDSS Exponential) Major Axis (2a) : a = 4.6542 arcsec 2a = 9.31 arcsec Uncertainty : 0.015 arcsec 0.03 arcsec Minor Axis (2b) : ... 2b = 5.82 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.625 b/a = 0.62 Uncertainty : 0.002 0.00 Ellipticity : ... 1 - b/a = 0.38 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.44 Uncertainty : ... ... Cos-1(b/a) : ... 51 deg Position Angle [Equinox] : 122.0 deg [J2000] 122 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 : 146.8171370899 22.0894991046 (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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