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(2018 RA)
Classification: Apollo [NEO]          SPK-ID: 3827149
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

[ hide orbit diagram ]

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 5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4638086742262764 0.00020367  
a 1.88270584825314 0.00071465 au
q 1.009490544816794 3.2854e-07 au
i 4.428807845657549 0.0014433 deg
node 336.3995387952826 3.8589e-05 deg
peri 13.48212459410888 0.00085446 deg
M 30.72889427081845 0.2225 deg
tp 2459315.959083596989
(2021-Apr-11.45908360)
0.53733 TDB
period 943.5656763158843
2.58
0.53725
0.001471
d
yr
n .3815314705019857 0.00021724 deg/d
Q 2.755921151689487 0.0010461 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.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      7  
   norm. resid. RMS      .38049  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 20:38:34  

Additional Information
 Earth MOID = .00690316 au 
 Jupiter MOID = 2.68528 au 
 T_jup = 3.826 
[ hide covariance matrix ]
Orbital Elements at Epoch 2458364.5 (2018-Sep-03.0) TDB
Reference: JPL 5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .466370578717697 0.00020144  
q 1.010286123401187 1.6443e-06 au
tp 2458372.406579879740
(2018-Sep-10.90657988)
0.0012297 TDB
node 336.480157329919 0.00010247 deg
peri 13.35491218970411 0.00063213 deg
i 4.458050622781005 0.0014127 deg
  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.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      7  
   norm. resid. RMS      .38049  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 20:38:34  

Additional Information
 Jupiter MOID = 2.68528 au 
 T_jup = 3.826 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.057771684692064E-8 3.28871206209796E-10 -2.446296671390147E-7 -1.918815840854211E-8 -1.160324074376033E-7 2.844805145051486E-7
q 3.28871206209796E-10 2.703804990353901E-12 -2.020327317575041E-9 -1.496827039392793E-10 -9.907570677791394E-10 2.31067610414041E-9
tp -2.446296671390147E-7 -2.020327317575041E-9 1.512203721613377E-6 1.097091132577654E-7 7.497059373725126E-7 -1.720027365724029E-6
node -1.918815840854211E-8 -1.496827039392793E-10 1.097091132577654E-7 1.049946756444839E-8 4.638574013421234E-8 -1.332190536070106E-7
peri -1.160324074376033E-7 -9.907570677791394E-10 7.497059373725126E-7 4.638574013421234E-8 3.995909265538452E-7 -8.206712985354746E-7
i 2.844805145051486E-7 2.31067610414041E-9 -1.720027365724029E-6 -1.332190536070106E-7 -8.206712985354746E-7 1.995805999347525E-6

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
2005-Oct-25 17:03 9_15:53 Earth 0.252401599499977 0.120871204991042 0.388785400419381 14.1261066611304 14.1253593365602 2453669.210483158 13912.6181836454 6905203.48551927 62.0357363445852 -12.41507834613 106819.736843971 T 5 CATAB v2.0g-lin.ifort 2021-Apr-15 20:38:35 2021-Apr-15 20:38
2006-Jan-23 08:42 9_06:39 Mars 0.0878424587739774 0.0852097658469534 0.155732641890956 8.91998344170952 8.91961806020807 2453758.862265500 13359.1827019947 5436522.75385565 196.328020399882 75.9470034594026 66359.0666855626 T 5 CATAB v2.0g-lin.ifort 2021-Apr-15 20:38:35 2021-Apr-15 20:38
2018-Sep-01 09:17 < 00:01 Earth 0.0077940690410352 0.00778525525013253 0.00780288255026005 6.91741812624315 6.86782016484365 2458362.886756585 0.0620088652294829 433.201691040066 8.24221638300042 1.65130831321088 1746.24111072541 T 5 CATAB v2.0g-lin.ifort 2021-Apr-15 20:38:35 2021-Apr-15 20:38
2018-Sep-01 14:53 < 00:01 Moon 0.00713877169883019 0.00713037584403792 0.00714716757703748 6.46126316477185 6.4605526031723 2458363.120105808 0.416903654517619 419.164246836475 7.29558685229352 -3.04084154958327 7093.65707102106 T 5 CATAB v2.0g-lin.ifort 2021-Apr-15 20:38:35 2021-Apr-15 20:38
2026-Oct-05 22:55 5_02:12 Mars 0.0831847713337316 0.0824772147188607 0.112483583618357 9.40251008235571 9.40214404364956 2461319.454726458 7332.28900882792 3275400.07497471 183.499678961539 -82.5416660566151 67788.7870442214 T 5 CATAB v2.0g-lin.ifort 2021-Apr-15 20:38:35 2021-Apr-15 20:38
2031-Jul-11 14:33 7_21:14 Earth 0.458513346383068 0.320840688562511 0.596284323508725 20.4423079812487 20.4420237096526 2463059.106169085 11353.8910617322 6875787.24461698 163.303885063864 2.6843210879375 17107.2785553723 T 5 CATAB v2.0g-lin.ifort 2021-Apr-15 20:38:35 2021-Apr-15 20:38
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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