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308242 (2005 GO21)
Classification: Aten [NEO, PHA]          SPK-ID: 2308242
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 56 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3399012321903717 1.5317e-07  
a .75331152310352 8.6293e-09 AU
q .4972600081774279 1.1694e-07 AU
i 24.92593419564647 1.025e-05 deg
node 272.7016164956753 4.4039e-06 deg
peri 156.6108396239906 2.9037e-05 deg
M 194.9031427739402 6.2504e-05 deg
tp 2456910.020810300279
(2014-Sep-09.52081030)
4.2702e-05 JED
period 238.8143079799167
0.65
4.1035e-06
1.123e-08
d
yr
n 1.507447367978783 2.5902e-08 deg/d
Q 1.009363038029612 1.1562e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      131  
   # delay obs. used      5  
   # Doppler obs. used      2  
   data-arc span      2658 days (7.28 yr)  
   first obs. used      2005-04-01  
   last obs. used      2012-07-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .48098  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Aug-05 09:40:41  

Additional Information
 Earth MOID = .0441537 AU 
 T_jup = 7.556 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.4 mag n/a MPO235360  
rotation period rot_per 11.00 h n/a Asteroid Lightcurve DataBase (Rev. 2013-Sep-12) Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Benner, L.A.M. http://echo.jpl.nasa.gov/asteroids/2005GO21/2 005GO21_planning.html]
[Higgins, D.J. (2012) http://www.david-higgins.com/Astronomy/astero id/lightcurves.htm]

308242 (2005 GO21)          Discovered 2005-Apr-01 by Siding Spring Survey at Siding Spring (E12)
Reference: 20111210/Numbers.arcLast Updated: 2011-12-12

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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