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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 66 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3399013329044308 1.2159e-07  
a .753311520065207 3.8418e-09 AU
q .4972599303027803 9.2797e-08 AU
i 24.92592761390451 5.9907e-06 deg
node 272.7016199291693 3.0706e-06 deg
peri 156.6108211775754 2.2917e-05 deg
M 194.9031906529411 4.389e-05 deg
tp 2456910.020777876048
(2014-Sep-09.52077788)
2.949e-05 JED
period 238.8143065351108
0.65
1.8269e-06
5.002e-09
d
yr
n 1.507447377098709 1.1532e-08 deg/d
Q 1.009363109827634 5.1476e-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      .43318  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jul-14 17:25:27  

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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