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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 ]

[ show orbit diagram ]
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 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457944.5 (2017-Jul-10.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2435888213028667 2.8044e-08  
q 1.9442019948538 6.8745e-08 au
tp 2457438.834511060369
(2016-Feb-20.33451106)
4.8942e-05 TDB
node 263.514572329258 3.0442e-05 deg
peri 61.83917285772574 3.2705e-05 deg
i 7.397765043055802 4.455e-06 deg
  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
 Jupiter MOID = 2.18857 au 
 T_jup = 3.376 
Orbit Covariance (6×6)
  e q tp node peri i
e 7.864729549699619E-16 -1.915505721010304E-15 4.597311686095004E-13 -6.025584549179366E-15 1.158885771615739E-13 -5.723059986846559E-16
q -1.915505721010304E-15 4.725930403134653E-15 -1.161480671846587E-12 1.389142974778504E-14 -2.857159568825452E-13 1.393944010879368E-15
tp 4.597311686095004E-13 -1.161480671846587E-12 2.395346646820413E-9 -1.177766907579932E-11 6.018584243630704E-10 -4.223692290091267E-12
node -6.025584549179366E-15 1.389142974778504E-14 -1.177766907579932E-11 9.26733521842365E-10 -9.218680739209825E-10 -7.364236131912552E-11
peri 1.158885771615739E-13 -2.857159568825452E-13 6.018584243630704E-10 -9.218680739209825E-10 1.069602996967942E-9 7.203334246167645E-11
i -5.723059986846559E-16 1.393944010879368E-15 -4.223692290091267E-12 -7.364236131912552E-11 7.203334246167645E-11 1.98469629619044E-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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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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