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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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2431258585223298 2.7975e-08  
a 2.570757516829835 1.145e-08 au
q 1.945739888497849 6.851e-08 au
i 7.397930623860805 4.4516e-06 deg
node 263.509530934608 3.0412e-05 deg
peri 61.62212077502795 3.2673e-05 deg
M 61.53827850014311 1.2192e-05 deg
tp 2458943.144804313512
(2020-Apr-03.64480431)
5.0504e-05 TDB
period 1505.532372780306
4.12
1.0058e-05
2.754e-08
d
yr
n .2391180731206586 1.5976e-09 deg/d
Q 3.195775145161821 1.4234e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1165  
   data-arc span      8351 days (22.86 yr)  
   first obs. used      1998-03-31  
   last obs. used      2021-02-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46874  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 12:23:04  

Additional Information
 Earth MOID = .944602 au 
 Jupiter MOID = 2.18857 au 
 T_jup = 3.376 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457946.5 (2017-Jul-12.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2435895615347365 2.7966e-08  
q 1.944198025753149 6.8565e-08 au
tp 2457438.834316251950
(2016-Feb-20.33431625)
4.8942e-05 TDB
node 263.5145845040071 3.0419e-05 deg
peri 61.83893753990664 3.2681e-05 deg
i 7.397768696772582 4.4535e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1165  
   data-arc span      8351 days (22.86 yr)  
   first obs. used      1998-03-31  
   last obs. used      2021-02-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46874  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 12:23:04  

Additional Information
 Jupiter MOID = 2.18857 au 
 T_jup = 3.376 
Orbit Covariance (6×6)
  e q tp node peri i
e 7.820935530024405E-16 -1.905090583242069E-15 4.59954452171755E-13 -5.936893924586566E-15 1.161169339273029E-13 -5.674451809757889E-16
q -1.905090583242069E-15 4.701144434678157E-15 -1.161988835945627E-12 1.36808527561737E-14 -2.862468634829412E-13 1.382495916108933E-15
tp 4.59954452171755E-13 -1.161988835945627E-12 2.395274099730238E-9 -1.160306633390386E-11 6.016493069095989E-10 -4.21075648226797E-12
node -5.936893924586566E-15 1.36808527561737E-14 -1.160306633390386E-11 9.252969286702329E-10 -9.204029767965428E-10 -7.373183593326808E-11
peri 1.161169339273029E-13 -2.862468634829412E-13 6.016493069095989E-10 -9.204029767965428E-10 1.068078241255927E-9 7.212504742665757E-11
i -5.674451809757889E-16 1.382495916108933E-15 -4.21075648226797E-12 -7.373183593326808E-11 7.212504742665757E-11 1.983347031319328E-11

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

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