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399308 (1993 GD)
Classification: Apollo [NEO]          SPK-ID: 2399308
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2456187.5 (2012-Sep-17.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2381477629743263 7.6998e-08  
a 1.102428706380494 7.799e-09 au
q .8398877761172987 8.2504e-08 au
i 15.46209034316993 1.0315e-05 deg
node 201.4853866108167 1.5451e-05 deg
peri 202.0364185121549 3.3834e-05 deg
M 63.12857460775904 3.9077e-05 deg
tp 2456113.360836846082
(2012-Jul-04.86083685)
4.6194e-05 TDB
period 422.7895038220939
1.16
4.4865e-06
1.228e-08
d
yr
n .8514875528969726 9.0356e-09 deg/d
Q 1.364969636643689 9.6563e-09 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A2 [EST] 9.867358471301421E-14 2.219E-14
ALN [SET] 1. n/a
NK [SET] 0. n/a
NM [SET] 2. n/a
R0 [SET] 1. n/a
  Orbit Determination Parameters
   # obs. used (total)      106  
   data-arc span      8048 days (22.03 yr)  
   first obs. used      1993-04-15  
   last obs. used      2015-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .63083  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jan-14 15:39:23  

Additional Information
 Earth MOID = .141528 au 
 Jupiter MOID = 4.04771 au 
 T_jup = 5.582 
 Nongravitational accels. using nonstandard g(r) = (1 au/ r)^2 
[ 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 20.7   n/a MPO339285  

399308 (1993 GD)          Discovered 1993-Apr-15 by Spacewatch at Kitt Peak
Reference: Last Updated: 2014-07-14

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