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(2018 RA)
Classification: Apollo [NEO]          SPK-ID: 3827149
[ 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 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4637771836317947 0.00020366  
a 1.882643981247045 0.0007165 au
q 1.009516657842942 8.1608e-07 au
i 4.428898804363635 0.0014418 deg
node 336.4009594865755 4.0715e-05 deg
peri 13.49340568997305 0.00078599 deg
M 239.6012454955411 0.13639 deg
tp 2459316.051479452727
(2021-Apr-11.55147945)		 0.53761 TDB
period 943.5191673745642
2.58		 0.53863
0.001475		 d
yr
n .3815502773533851 0.00021782 deg/d
Q 2.755771304651149 0.0010488 au
   Orbit Determination Parameters
   # obs. used (total)      68  
   data-arc span      3 days  
   first obs. used      2018-09-01  
   last obs. used      2018-09-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      7  
   norm. resid. RMS      .38171  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Sep-14 07:26:56  

Additional Information
 Earth MOID = .0076268 au 
 Jupiter MOID = 2.68436 au 
 T_jup = 3.826 
[ 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 26.7   .21998 MPO452087 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
1917-Sep-16 14:09 6_21:24 Earth 0.0259418666200638 0.0160168916054545 0.0363867753979996 6.89349461382268 6.87857897715941 2421488.089780211 9924.07103603387 540112.273906284 98.573244586813 -18.2847776741534 11952.1802685751 T 4 CATAB v2.0e-lin.ifort 2018-Sep-14 07:27:48 2018-Dec-11 17:22
2005-Oct-25 08:07 9_18:41 Earth 0.247221818613449 0.116204985277228 0.3834474678268 13.9654073183942 13.9646355553951 2453668.837934267 14080.9588211296 6900475.42586694 61.4431003941842 -12.651265973129 107499.70191721 T 4 CATAB v2.0e-lin.ifort 2018-Sep-14 07:27:48 2018-Dec-11 17:22
2006-Jan-23 00:08 9_08:22 Mars 0.0889504751096612 0.0852021196525549 0.159315349542842 8.85558031138938 8.85521685709806 2453758.505308011 13462.2782719572 5439374.80075348 197.517100465441 73.315773536763 66101.1564023988 T 4 CATAB v2.0e-lin.ifort 2018-Sep-14 07:27:48 2018-Dec-11 17:22
2018-Sep-01 09:17 < 00:01 Earth 0.00779440725166346 0.00778559269788773 0.00780322152376065 6.91771916812705 6.86812554050517 2458362.886757131 0.0620075249798493 433.240000269972 8.24257602950073 1.65106107373024 1746.10041354784 T 4 CATAB v2.0e-lin.ifort 2018-Sep-14 07:27:48 2018-Dec-11 17:22
2018-Sep-01 14:53 < 00:01 Moon 0.00713909420275981 0.00713069758287922 0.00714749084605811 6.46155926491796 6.46084876799042 2458363.120094037 0.416897695118155 419.202446680263 7.29594276737808 -3.04081458917091 7093.61695177281 T 4 CATAB v2.0e-lin.ifort 2018-Sep-14 07:27:48 2018-Dec-11 17:22
2026-Oct-06 03:35 5_01:50 Mars 0.083549269604152 0.08247412524865 0.114225198480294 9.44185876217828 9.44149583927519 2461319.649609066 7310.14224428771 3275553.38262571 182.824779244751 -80.8145271540776 67967.2245644425 T 4 CATAB v2.0e-lin.ifort 2018-Sep-14 07:27:48 2018-Dec-11 17:22
2031-Jul-11 21:49 7_21:46 Earth 0.453233855829861 0.315578168012245 0.590995555143192 20.2895903238658 20.2893005762732 2463059.408828805 11386.2442327026 6875670.2493676 162.268546594121 2.76732410274473 17527.1181872925 T 4 CATAB v2.0e-lin.ifort 2018-Sep-14 07:27:48 2018-Dec-11 17:22
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