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(2018 SD3)
Classification: Apollo [NEO]          SPK-ID: 3831067
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 1 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2753884987172487 0.00022285  
a 1.379464904869762 0.00043134 au
q .9995761356845461 5.5562e-06 au
i 12.00510715879899 0.0071253 deg
node 187.4176041850667 0.00011344 deg
peri 202.0199923896899 0.0044031 deg
M 357.5850701536381 0.16444 deg
tp 2459004.469779906398
(2020-Jun-03.96977991)
0.27217 TDB
period 591.7856241067923
1.62
0.27757
0.0007599
d
yr
n .6083283968639212 0.00028533 deg/d
Q 1.759353674054978 0.00055013 au
  Orbit Determination Parameters
   # obs. used (total)      22  
   data-arc span      2 days  
   first obs. used      2018-09-30  
   last obs. used      2018-10-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      7  
   norm. resid. RMS      .29925  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Oct-03 03:38:38  

Additional Information
 Earth MOID = .0142118 au 
 Jupiter MOID = 3.6922 au 
 T_jup = 4.740 
[ 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 27.9   .31488 E2018T36 autocmod 2.6n

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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
1982-Mar-16 19:47 8_01:02 Mars 0.0906851981757129 0.0790870056974112 0.208871737614208 7.24218370343419 7.24174777689023 2445045.324466774 11581.7895521562 7428191.6063595 561.773576363198 60.7197878962697 21150.8819661075 T 1 CATAB v2.0e-lin.ifort 2018-Oct-03 03:38:43 2018-Dec-11 17:23
2018-Oct-02 12:13 < 00:01 Earth 0.0138371508611259 0.0138099182603013 0.0138643827641295 7.69005659750839 7.66497559190012 2458394.009296403 0.332571006526833 1349.06401412957 46.9403618535999 -0.655958648578374 910.173023968541 T 1 CATAB v2.0e-lin.ifort 2018-Oct-03 03:38:43 2018-Dec-11 17:23
2031-Sep-09 19:25 8_15:19 Earth 0.228108911248977 0.11841582214302 0.340033454637193 12.1134620897485 12.1124977743375 2463119.309039426 12439.2119013523 5639235.68745862 286.128199482659 -10.079491037403 17708.6267654321 T 1 CATAB v2.0e-lin.ifort 2018-Oct-03 03:38:43 2018-Dec-11 17:23
2073-Dec-07 16:34 6_15:39 Earth 0.486795271889102 0.40131612424509 0.574523472452223 17.6340766965821 17.6337662998772 2478549.190605030 9579.2324004757 4623385.42293063 550.189928827472 20.5769378007548 38766.4588635381 T 1 CATAB v2.0e-lin.ifort 2018-Oct-03 03:38:43 2018-Dec-11 17:23
2180-Aug-29 20:09 3_20:52 Earth 0.404845155563681 0.331481344351057 0.478499595677374 16.8149101529197 16.8145187411204 2517530.339332710 5571.85348040155 3705303.96989993 282.66420192888 -8.26603285979383 26739.5749204806 T 1 CATAB v2.0e-lin.ifort 2018-Oct-03 03:38:43 2018-Dec-11 17:23
2181-Feb-03 05:23 7_20:09 Earth 0.47728586675045 0.453619731700047 0.501385184479335 7.29956944858414 7.2988046284894 2517687.724104848 11288.6477593596 1390182.77790261 795.000935398911 -31.0574407181302 20313.2209356517 T 1 CATAB v2.0e-lin.ifort 2018-Oct-03 03:38:43 2018-Dec-11 17:23
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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