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(2018 TW1)
Classification: Apollo [NEO]          SPK-ID: 3831214
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 .47128009074657 0.00048351  
a 1.898287004001068 0.0017446 au
q 1.00366213249241 4.6116e-06 au
i 8.660273127191154 0.0063561 deg
node 192.8323123287086 0.0002329 deg
peri 191.6848114455877 0.0030846 deg
M 223.4627874267427 0.30684 deg
tp 2459362.817883114219
(2021-May-28.31788311)
1.3137 TDB
period 955.3032134088419
2.62
1.3169
0.003605
d
yr
n .3768437025511507 0.00051949 deg/d
Q 2.792911875509726 0.0025667 au
  Orbit Determination Parameters
   # obs. used (total)      43  
   data-arc span      2 days  
   first obs. used      2018-10-05  
   last obs. used      2018-10-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      7  
   norm. resid. RMS      .511  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Oct-07 09:12:11  

Additional Information
 Earth MOID = .0107613 au 
 Jupiter MOID = 2.66379 au 
 T_jup = 3.794 
[ 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 27.8   .34321 MPO458800 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
2018-Oct-06 08:52 < 00:01 Earth 0.0110522750633861 0.0110232852910926 0.0110812636971289 8.04969167625528 8.01968681745188 2458397.869282143 0.269398608486126 1434.67025633425 10.9494791134754 0.0648096240663324 686.641207976275 T 1 CATAB v2.0e-lin.ifort 2018-Oct-07 09:12:14 2018-Dec-11 17:23
2094-Aug-23 01:07 4_01:37 Earth 0.39651312404594 0.334509060875538 0.458632734355589 18.6107172909229 18.6103562171938 2486112.546251179 5856.59675327431 3113126.42072572 63.3974859618194 -6.16003456504636 89393.0840681453 T 1 CATAB v2.0e-lin.ifort 2018-Oct-07 09:12:14 2018-Dec-11 17:23
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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