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(2018 XL1)
Classification: Apollo [NEO]          SPK-ID: 3836748
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 .4535210163755446 0.00021215  
a 1.809211422056729 0.00071693 au
q .988696019087317 7.9628e-06 au
i 2.528425949032548 0.0010684 deg
node 254.4543036355614 6.0645e-05 deg
peri 192.4045764829219 0.00070752 deg
M 14.84986625329938 0.22237 deg
tp 2459359.834935813390
(2021-May-25.33493581)
0.52726 TDB
period 888.8580463980305
2.43
0.52834
0.001447
d
yr
n .4050140530975089 0.00024074 deg/d
Q 2.629726825026141 0.0010421 au
  Orbit Determination Parameters
   # obs. used (total)      63  
   data-arc span      4 days  
   first obs. used      2018-12-10  
   last obs. used      2018-12-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      7  
   norm. resid. RMS      .45782  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 20:55:51  

Additional Information
 Earth MOID = .00779595 au 
 Jupiter MOID = 2.61797 au 
 T_jup = 3.926 
[ 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 27.0   .47643 E2018Y42 autocmod 2.6q

[ 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
1929-Feb-04 21:34 8_23:38 Earth 0.311542245796427 0.164907190826115 0.459135437565778 15.8629119945418 15.862372831796 2425647.398591066 12937.5447028392 7386442.39334546 60.5848976053129 5.92620076569628 66396.612305155 T 5 CATAB v2.0g-lin.ifort 2021-Apr-15 20:55:52 2021-Apr-15 20:55
1980-Feb-05 23:40 8_13:25 Earth 0.309906709561929 0.172081795905519 0.448597579499619 15.7869479949875 15.786403378618 2444275.485787875 12325.4352811709 6942623.81808288 60.6523186696487 6.06928522321812 67475.2353315252 T 5 CATAB v2.0g-lin.ifort 2021-Apr-15 20:55:52 2021-Apr-15 20:55
1984-Oct-21 17:12 8_23:29 Earth 0.384794638392467 0.232032198828571 0.537759848945701 18.1577563740759 18.1573750223462 2445995.216610612 12928.6077595913 7635418.4781661 63.2739605789863 -3.063726703786 41342.638341442 T 5 CATAB v2.0g-lin.ifort 2021-Apr-15 20:55:52 2021-Apr-15 20:55
2018-Dec-11 23:45 < 00:01 Moon 0.00763822321377979 0.00763061570366263 0.00764583108244809 6.883972270734 6.88334895659255 2458464.489686892 0.354215949875401 388.237579207876 1.73729190531648 -12.3283293140096 124507.018899828 T 5 CATAB v2.0g-lin.ifort 2021-Apr-15 20:55:52 2021-Apr-15 20:55
2018-Dec-12 06:07 < 00:01 Earth 0.00621773284909886 0.00620974171734385 0.00622572350516663 6.16962848229622 6.09977519662523 2458464.754842134 0.0963588445884346 389.031890571445 1.79638924654987 -0.655217329461131 1301.85327288668 T 5 CATAB v2.0g-lin.ifort 2021-Apr-15 20:55:52 2021-Apr-15 20:55
2021-Oct-02 11:22 1_03:08 Mars 0.0970262033560808 0.095579252080545 0.102721113826131 11.9934115052841 11.9931654804914 2459489.973686772 1627.6182996381 1044374.54923193 118.630177533519 -80.0973111318137 121670.120642264 T 5 CATAB v2.0g-lin.ifort 2021-Apr-15 20:55:52 2021-Apr-15 20:55
2035-Oct-01 11:09 9_20:33 Mars 0.092332415958111 0.0919800265224328 0.199239189233867 12.1067720364136 12.1065159254193 2464601.964422464 14193.3755404155 8412438.90321163 102.574214360891 85.006987540902 135021.883875208 T 5 CATAB v2.0g-lin.ifort 2021-Apr-15 20:55:52 2021-Apr-15 20:55
2077-Feb-17 15:29 4_16:56 Mars 0.095600990318865 0.0948996268050631 0.106692780294092 11.7447101159626 11.7444551359054 2479717.145175580 6775.93351284614 1855733.60116547 120.283471815865 83.0665718102349 119400.980811633 T 5 CATAB v2.0g-lin.ifort 2021-Apr-15 20:55:52 2021-Apr-15 20:55
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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