NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2022-01-21 T00:57:11 PST
Help | Comment | NED Home

Diameter data point(s) for object WISEA J154955.22+382357.8

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 r (SDSS Isophotal)
2007SDSS6.C...0000:
1.55 (a) arcsec 0.14 arcsec ... ... ... ... 84.1
[J2000]
25.0 mag arcsec^-2^ 4.77E+14 3.10 ... 0.09 0.91 0.98 85 84
[J2000]
2 r (SDSS Petrosian)
2007SDSS6.C...0000:
0.35 (a) arcsec ... ... ... 0.053 ... ... ... ... 4.77E+14 0.70 0.11 ... ... ... ... ...
3 r (SDSS deVaucouleurs)
2007SDSS6.C...0000:
0.0235 (a) arcsec ... ... 0.198 (b/a) 1.595 ... ... 111.8
[J2000]
... 4.77E+14 0.05 3.19 0.20 0.80 0.92 79 112
[J2000]
4 r (SDSS Exponential)
2007SDSS6.C...0000:
0.0452 (a) arcsec ... ... 0.059 (b/a) 7.476 ... ... 112.0
[J2000]
... 4.77E+14 0.09 14.95 0.06 0.94 0.99 87 112
[J2000]


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 2007SDSS6.C...0000:
Published Object Name         : SDSS J154955.23+382357.9      
Frequency Targeted            : r (SDSS Isophotal)            
Major Axis (2a)               : a = 1.55       arcsec               2a = 3.10 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : b =       0.14 arcsec               2b = 0.28 arcsec 
Uncertainty                   : ...                                 ...
Axis Ratio                    : ...                                 b/a = 0.09
Uncertainty                   : ...                                 ...
Ellipticity                   : ...                                 1 - b/a = 0.91
Uncertainty                   : ...                                 ...
Eccentricity                  : ...                                 [(a/b)2-1]/[(a/b)2+1] = 0.98
Uncertainty                   : ...                                 ...
Cos-1(b/a)                    : ...                                 85 deg
Position Angle [Equinox]      :   84.1 deg [J2000]                  84 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          : 237.4801599701  38.3994258183    (J2000)
Qualifiers                    : From new, raw data; DIA_MAJ or DIA_MIN modified from
                               published data
NED Comment                   :                                         

No. 2 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J154955.23+382357.9 Frequency Targeted : r (SDSS Petrosian) Major Axis (2a) : a = 0.35 arcsec 2a = 0.70 arcsec Uncertainty : 0.053 arcsec 0.11 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 : 237.4801599701 38.3994258183 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment :
No. 3 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J154955.23+382357.9 Frequency Targeted : r (SDSS deVaucouleurs) Major Axis (2a) : a = 0.0235 arcsec 2a = 0.05 arcsec Uncertainty : 1.595 arcsec 3.19 arcsec Minor Axis (2b) : ... 2b = 0.01 arcsec Uncertainty : ... 704.00 Axis Ratio : b/a = 0.198 b/a = 0.20 Uncertainty : 220.691 220.69 Ellipticity : ... 1 - b/a = 0.80 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.92 Uncertainty : ... ... Cos-1(b/a) : ... 79 deg Position Angle [Equinox] : 111.8 deg [J2000] 112 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 : 237.4801599701 38.3994258183 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment : Effective (half-light) radius
No. 4 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J154955.23+382357.9 Frequency Targeted : r (SDSS Exponential) Major Axis (2a) : a = 0.0452 arcsec 2a = 0.09 arcsec Uncertainty : 7.476 arcsec 14.95 arcsec Minor Axis (2b) : ... 2b = 0.01 arcsec Uncertainty : ... 1506.10 Axis Ratio : b/a = 0.059 b/a = 0.06 Uncertainty : 100.736 100.74 Ellipticity : ... 1 - b/a = 0.94 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.99 Uncertainty : ... ... Cos-1(b/a) : ... 87 deg Position Angle [Equinox] : 112.0 deg [J2000] 112 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 : 237.4801599701 38.3994258183 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment : Effective (half-light) radius

Back to NED Home