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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 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 66 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3399215399562459 1.2157e-07  
a .7532384023798501 3.8218e-09 au
q .497196444688709 9.2748e-08 au
i 24.92598248462498 5.9905e-06 deg
node 272.6988822479325 3.0703e-06 deg
peri 156.6220263234866 2.2921e-05 deg
M 19.46212529178647 4.7286e-05 deg
tp 2457387.591229772817
(2015-Dec-31.09122977)
3.131e-05 JED
period 238.7795378003839
0.65
1.8173e-06
4.975e-09
d
yr
n 1.507666876803131 1.1475e-08 deg/d
Q 1.009280360070991 5.121e-09 au
  Orbit Determination Parameters
   # obs. used (total)      156  
   # delay obs. used      6  
   # Doppler obs. used      2  
   data-arc span      3385 days (9.27 yr)  
   first obs. used      2005-04-01  
   last obs. used      2014-07-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .43635  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jul-14 17:25:27  

Additional Information
 Earth MOID = .0452219 au 
 Jupiter MOID = 4.25159 au 
 T_jup = 7.557 
[ 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 16.5 mag n/a MPO300358  
rotation period rot_per 11.00 h n/a LCDB (Rev. 2015-December); Warner et al., 2009 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
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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