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66491 (1999 RG54)
Classification: Main-belt Asteroid          SPK-ID: 2066491
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3163928612608475 3.9579e-08  
a 2.440458290545299 1.1033e-08 au
q 1.668314709211915 9.6877e-08 au
i 3.765801591460301 4.2405e-06 deg
node 98.07868995210177 6.5863e-05 deg
peri 281.41329047101 6.656e-05 deg
M 234.0147773107839 1.6036e-05 deg
tp 2459883.829406549564
(2022-Oct-31.32940655)
6.4955e-05 TDB
period 1392.533049615032
3.81
9.4432e-06
2.585e-08
d
yr
n .2585216918905605 1.7531e-09 deg/d
Q 3.212601871878682 1.4524e-08 au
  Orbit Determination Parameters
   # obs. used (total)      768  
   data-arc span      13428 days (36.76 yr)  
   first obs. used      1984-09-05  
   last obs. used      2021-06-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .56575  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 22:32:11  

Additional Information
 Earth MOID = .675188 au 
 Jupiter MOID = 2.25681 au 
 T_jup = 3.429 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457220.5 (2015-Jul-17.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3148960513052949 3.9574e-08  
q 1.672822645534911 9.696e-08 au
tp 2457093.762452687716
(2015-Mar-12.26245269)
4.8933e-05 TDB
node 98.31890548824046 6.5903e-05 deg
peri 280.673454076061 6.6609e-05 deg
i 3.764182718493164 4.2394e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      768  
   data-arc span      13428 days (36.76 yr)  
   first obs. used      1984-09-05  
   last obs. used      2021-06-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .56575  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 22:32:11  

Additional Information
 Jupiter MOID = 2.25681 au 
 T_jup = 3.429 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.566129138245573E-15 -3.824458421787151E-15 1.165453706209417E-13 -1.029607404327731E-14 -2.170889264146743E-14 -5.833149442065918E-16
q -3.824458421787151E-15 9.401240113105022E-15 3.162111812992394E-14 2.786509501841627E-14 1.139234424159671E-13 1.591822235044723E-15
tp 1.165453706209417E-13 3.162111812992394E-14 2.394421249389132E-9 1.497365651957417E-11 4.937468013730082E-10 5.946601213881455E-14
node -1.029607404327731E-14 2.786509501841627E-14 1.497365651957417E-11 4.343213113091805E-9 -4.329833972548694E-9 3.76512130522926E-11
peri -2.170889264146743E-14 1.139234424159671E-13 4.937468013730082E-10 -4.329833972548694E-9 4.436750458759165E-9 -3.754931473498616E-11
i -5.833149442065918E-16 1.591822235044723E-15 5.946601213881455E-14 3.76512130522926E-11 -3.754931473498616E-11 1.797232265949251E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.70   n/a MPO636969  
rotation period rot_per 2.868 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

66491 (1999 RG54)          Discovered 1999-Sep-07 by LINEAR at Socorro
Reference: 20030910/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 RG54 = 1984 RL = 1993 BD10 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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