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66539 (1999 RX117)
Classification: Main-belt Asteroid          SPK-ID: 2066539
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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2431258592084534 2.8054e-08  
a 2.570757517665118 1.1464e-08 au
q 1.945739887366195 6.8693e-08 au
i 7.397930639873869 4.4531e-06 deg
node 263.509530933695 3.0435e-05 deg
peri 61.62212071721384 3.2697e-05 deg
M 61.53827850282203 1.2192e-05 deg
tp 2458943.144804176880
(2020-Apr-03.64480418)
5.0505e-05 TDB
period 1505.532373514066
4.12
1.007e-05
2.757e-08
d
yr
n .2391180730041184 1.5994e-09 deg/d
Q 3.19577514796404 1.4251e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1157  
   data-arc span      8328 days (22.80 yr)  
   first obs. used      1998-03-31  
   last obs. used      2021-01-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47021  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 06:26:54  

Additional Information
 Earth MOID = .944602 au 
 Jupiter MOID = 2.18857 au 
 T_jup = 3.376 
[ 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 15.05   n/a E2021B10  
rotation period rot_per 18.5202 h n/a LCDB (Rev. 2020-October); 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:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]

66539 (1999 RX117)          Discovered 1999-Sep-09 by LINEAR at Socorro
Reference: 20030910/Numbers.arcLast Updated: 2004-04-19

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