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(2018 RA2)
Classification: Apollo [NEO]          SPK-ID: 3827317
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | 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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3989261140992327 0.0006855  
a 1.500459707953402 0.0015381 au
q .901887147297082 0.00010405 au
i 6.647662912522986 0.0099922 deg
node 344.5242114376164 0.00030102 deg
peri 61.58654728803088 0.0041712 deg
M 311.3006619646474 0.46836 deg
tp 2459091.314561579679
(2020-Aug-29.81456158)
1.013 TDB
period 671.328266206644
1.84
1.0323
0.002826
d
yr
n .5362503236072397 0.00082457 deg/d
Q 2.099032268609722 0.0021517 au
  Orbit Determination Parameters
   # obs. used (total)      59  
   data-arc span      7 days  
   first obs. used      2018-09-07  
   last obs. used      2018-09-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      7  
   norm. resid. RMS      .33275  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Sep-11 07:40:04  

Additional Information
 Earth MOID = .0211645 au 
 Jupiter MOID = 3.33007 au 
 T_jup = 4.446 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 25.4   .38282 MPO477908 autocmod 2.6n

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
2016-Sep-10 04:00 1_06:09 Mars 0.0873369492521133 0.0660232565803816 0.122423335040829 8.69361405976235 8.6932369938863 2457641.666706663 1808.55390514806 2255346.05231576 230.772061727949 -47.7257019238716 43817.774592687 T 9 CATAB v2.0f-lin.ifort 2020-Sep-11 07:40:16 2020-Sep-11 07:40
2018-Sep-16 19:04 < 00:01 Earth 0.0205548406417946 0.0204577401025328 0.0206519384473522 9.33860291392992 9.32471172364046 2458378.294708538 0.109422750893238 4827.47150339338 10.9382841191841 0.0185919594177546 399.071211779963 T 9 CATAB v2.0f-lin.ifort 2020-Sep-11 07:40:16 2020-Sep-11 07:40
2019-Jan-24 01:23 05:08 Earth 0.413709639029415 0.411803535565643 0.415615979834429 4.80864247664569 4.80730293961686 2458507.557772278 307.529704068523 96331.7486206565 590.719355354535 -9.26204027958156 18198.6617302266 T 9 CATAB v2.0f-lin.ifort 2020-Sep-11 07:40:16 2020-Sep-11 07:40
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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