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

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 83 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3399573549691476 1.4823e-07  
a .7532194426699386 5.0624e-09 au
q .4971569532285308 1.133e-07 au
i 24.92832903563296 6.8211e-06 deg
node 272.6888262215367 3.6654e-06 deg
peri 156.6382559847271 2.7859e-05 deg
M 271.9098549265566 7.4695e-05 deg
tp 2459058.925916549316
(2020-Jul-28.42591655)
4.9997e-05 TDB
period 238.7705224031338
0.65
2.4072e-06
6.591e-09
d
yr
n 1.507723802656785 1.52e-08 deg/d
Q 1.009281932111346 6.7834e-09 au
  Orbit Determination Parameters
   # obs. used (total)      207  
   # delay obs. used      6  
   # Doppler obs. used      2  
   data-arc span      5562 days (15.23 yr)  
   first obs. used      2005-04-01  
   last obs. used      2020-06-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41479  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-24 08:44:17  

Additional Information
 Earth MOID = .0438367 au 
 Jupiter MOID = 4.24397 au 
 T_jup = 7.557 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.5   n/a MPO476376  
rotation period rot_per 11.00 h n/a LCDB (Rev. 2019-August); 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/2005GO21/2005GO21_planning.html]
[Higgins, D.J. (2012) http://www.david-higgins.com/Astronomy/asteroid/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 | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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