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Date and Time of the Query: 2019-05-20 T00:57:26 PDT
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Diameter data point(s) for object NGC 4449

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
6.00 arcmin 4.50 arcmin ... ... ... ... 45
[B1950]
About 25.0 B-mag arcsec^-2^ 7.40E+14 360.00 ... 0.75 0.25 0.28 41 45
[J2000]
2 POSS1 103a-O
1964MCG2..C...0000V
2.80 arcmin 1.70 arcmin ... ... ... ... ... Very high surface brightness 7.40E+14 168.00 ... 0.61 0.39 0.46 53 ...
3 POSS1 103a-O
1964MCG2..C...0000V
5.50 arcmin 4.50 arcmin ... ... ... ... ... Intermed. surface brightness 7.40E+14 330.00 ... 0.82 0.18 0.20 35 ...
4 RC3 D_25, R_25 (blue)
1991RC3.9.C...0000d
1.79 log(2a) + 1 ... ... 0.15
log(a/b)
0.01 ... ... 45
[J2000]
25.0 B-mag arcsec^-2^ 6.81E+14 370.00 8.60 0.71 0.29 0.33 45 45
[J2000]
5 RC3 A_e (Johnson B)
1991RC3.9.C...0000d
1.21 log(2a) + 1 ... ... ... 0.00 ... ... ... ... 6.81E+14 97.30 0.00 ... ... ... ... ...
6 RC3 D_0 (blue)
1991RC3.9.C...0000d
1.79 log(2a) + 1 ... ... ... ... ... ... ... 25.0 B-mag arcsec^-2^ 6.81E+14 370.00 ... ... ... ... ... ...
7 K_s (LGA/2MASS isophotal)
2003AJ....125..525J
115.2 (a) arcsec ... ... 0.650 (b/a) ... ... ... 50.0
[J2000]
20.0 K-mag arcsec^-2^ 1.38E+14 230.40 ... 0.65 0.35 0.41 49 50
[J2000]
8 K_s (LGA/2MASS "total")
2003AJ....125..525J
240.2 (a) arcsec ... ... 0.650 (b/a) ... ... ... 50.0
[J2000]
Diameter for "total" magnitude 1.38E+14 480.40 ... 0.65 0.35 0.41 49 50
[J2000]
9 r (SDSS Isophotal)
2007SDSS6.C...0000:
182.82 (a) arcsec 45.24 arcsec ... ... ... ... 49.8
[J2000]
25.0 mag arcsec^-2^ 4.77E+14 365.63 ... 0.25 0.75 0.88 76 50
[J2000]
10 r (SDSS Petrosian)
2007SDSS6.C...0000:
19.02 (a) arcsec ... ... ... 1.269 ... ... ... ... 4.77E+14 38.04 2.54 ... ... ... ... ...
11 r (SDSS deVaucouleurs)
2007SDSS6.C...0000:
10.3662 (a) arcsec ... ... 0.578 (b/a) 0.057 ... ... 44.2
[J2000]
... 4.77E+14 20.73 0.11 0.58 0.42 0.50 55 44
[J2000]
12 r (SDSS Exponential)
2007SDSS6.C...0000:
13.0749 (a) arcsec ... ... 0.400 (b/a) 0.035 ... ... 42.7
[J2000]
... 4.77E+14 26.15 0.07 0.40 0.60 0.72 66 43
[J2000]


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 1973UGC...C...0000N
Published Object Name         : UGC 07592                     
Frequency Targeted            : POSS1 103a-O                  
Major Axis (2a)               : 6.00       arcmin                   2a = 360.00 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : 2b =  4.50      arcmin              2b = 270.00 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]      :  45    deg [B1950]                  45 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          : 122548.         +442200.    (B1950)
Qualifiers                    : From new, raw data
NED Comment                   :                                         

No. 2 Published Units: Homogenized Units: Reference Code : 1964MCG2..C...0000V Published Object Name : MCG +07-26-009 Frequency Targeted : POSS1 103a-O Major Axis (2a) : 2.80 arcmin 2a = 168.00 arcsec Uncertainty : ... ... Minor Axis (2b) : 2b = 1.70 arcmin 2b = 102.00 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.61 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.39 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.46 Uncertainty : ... ... Cos-1(b/a) : ... 53 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 : 122548 +4423 (B1950) Qualifiers : From new, raw data NED Comment :
No. 3 Published Units: Homogenized Units: Reference Code : 1964MCG2..C...0000V Published Object Name : MCG +07-26-009 Frequency Targeted : POSS1 103a-O Major Axis (2a) : 5.50 arcmin 2a = 330.00 arcsec Uncertainty : ... ... Minor Axis (2b) : 2b = 4.50 arcmin 2b = 270.00 arcsec Uncertainty : ... ... Axis Ratio : ... 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] : ... ... 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 : 122548 +4423 (B1950) Qualifiers : From new, raw data NED Comment :
No. 4 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : UGC 07592 Frequency Targeted : RC3 D_25, R_25 (blue) Major Axis (2a) : log(2a) + 1 = 1.79 2a = 370.00 arcsec Uncertainty : 0.01 8.60 arcsec Minor Axis (2b) : ... 2b = 261.96 arcsec Uncertainty : ... ... Axis Ratio : log(a/b) = 0.15 b/a = 0.71 Uncertainty : 0.02 0.03 Ellipticity : ... 1 - b/a = 0.29 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.33 Uncertainty : ... ... Cos-1(b/a) : ... 45 deg Position Angle [Equinox] : 45 deg [J2000] 45 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 : 122811.4 +440540. (J2000) Qualifiers : Homogenized from previously published data NED Comment :
No. 5 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : UGC 07592 Frequency Targeted : RC3 A_e (Johnson B) Major Axis (2a) : log(2a) + 1 = 1.21 2a = 97.30 arcsec Uncertainty : 0.00 0.00 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 : 122811.4 +440540. (J2000) Qualifiers : From new, raw data NED Comment : From magnitude-aperture curves.
No. 6 Published Units: Homogenized Units: Reference Code : 1991RC3.9.C...0000d Published Object Name : UGC 07592 Frequency Targeted : RC3 D_0 (blue) Major Axis (2a) : log(2a) + 1 = 1.79 2a = 370.00 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 : 122811.4 +440540. (J2000) Qualifiers : Homogenized from previously published data NED Comment : Extinction and inclination corrected.
No. 7 Published Units: Homogenized Units: Reference Code : 2003AJ....125..525J Published Object Name : NGC 4449 Frequency Targeted : K_s (LGA/2MASS isophotal) Major Axis (2a) : a = 115.2 arcsec 2a = 230.40 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 149.76 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.650 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) : ... 49 deg Position Angle [Equinox] : 50.0 deg [J2000] 50 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 : 187.046326 44.093559 (J2000) Qualifiers : From new, raw data NED Comment :
No. 8 Published Units: Homogenized Units: Reference Code : 2003AJ....125..525J Published Object Name : NGC 4449 Frequency Targeted : K_s (LGA/2MASS "total") Major Axis (2a) : a = 240.2 arcsec 2a = 480.40 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 312.26 arcsec Uncertainty : ... ... Axis Ratio : b/a = 0.650 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) : ... 49 deg Position Angle [Equinox] : 50.0 deg [J2000] 50 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 : 187.046326 44.093559 (J2000) Qualifiers : From new, raw data NED Comment :
No. 9 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J122811.10+440537.0 Frequency Targeted : r (SDSS Isophotal) Major Axis (2a) : a = 182.82 arcsec 2a = 365.63 arcsec Uncertainty : ... ... Minor Axis (2b) : b = 45.24 arcsec 2b = 90.48 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.25 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.75 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.88 Uncertainty : ... ... Cos-1(b/a) : ... 76 deg Position Angle [Equinox] : 49.8 deg [J2000] 50 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 : 187.0462613669 44.0936300495 (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 J122811.10+440537.0 Frequency Targeted : r (SDSS Petrosian) Major Axis (2a) : a = 19.02 arcsec 2a = 38.04 arcsec Uncertainty : 1.269 arcsec 2.54 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 : 187.0462613669 44.0936300495 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment :
No. 11 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J122811.10+440537.0 Frequency Targeted : r (SDSS deVaucouleurs) Major Axis (2a) : a = 10.3662 arcsec 2a = 20.73 arcsec Uncertainty : 0.057 arcsec 0.11 arcsec Minor Axis (2b) : ... 2b = 11.98 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.578 b/a = 0.58 Uncertainty : 0.003 0.00 Ellipticity : ... 1 - b/a = 0.42 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.50 Uncertainty : ... ... Cos-1(b/a) : ... 55 deg Position Angle [Equinox] : 44.2 deg [J2000] 44 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 : 187.0462613669 44.0936300495 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment : Effective (half-light) radius
No. 12 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J122811.10+440537.0 Frequency Targeted : r (SDSS Exponential) Major Axis (2a) : a = 13.0749 arcsec 2a = 26.15 arcsec Uncertainty : 0.035 arcsec 0.07 arcsec Minor Axis (2b) : ... 2b = 10.46 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.400 b/a = 0.40 Uncertainty : 0.001 0.00 Ellipticity : ... 1 - b/a = 0.60 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.72 Uncertainty : ... ... Cos-1(b/a) : ... 66 deg Position Angle [Equinox] : 42.7 deg [J2000] 43 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 : 187.0462613669 44.0936300495 (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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