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(2018 TW1)
Classification: Apollo [NEO]          SPK-ID: 3831214
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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 2 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4712186468403292 0.0004845  
a 1.898610748078354 0.0017432 au
q 1.003949960492367 2.0455e-06 au
i 8.659498977693826 0.0063599 deg
node 192.824029561542 0.00034301 deg
peri 191.6710780757214 0.0030665 deg
M 298.8490472015028 0.41061 deg
tp 2459362.812907367281
(2021-May-28.31290737)
1.3134 TDB
period 955.547607651622
2.62
1.316
0.003603
d
yr
n .3767473196701785 0.00051887 deg/d
Q 2.793271535664342 0.0025647 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.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      7  
   norm. resid. RMS      .51366  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 20:43:16  

Additional Information
 Earth MOID = .00967694 au 
 Jupiter MOID = 2.66462 au 
 T_jup = 3.794 
[ hide covariance matrix ]
Orbital Elements at Epoch 2458397.5 (2018-Oct-06.0) TDB
Reference: JPL 2 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4737507221881074 0.00047872  
q 1.003954124116782 7.6189e-06 au
tp 2458407.484994441070
(2018-Oct-15.98499444)
0.0036009 TDB
node 192.8668378074165 0.00013979 deg
peri 191.5094305013417 0.00257 deg
i 8.684293676514606 0.0062924 deg
  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.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      7  
   norm. resid. RMS      .51366  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 20:43:16  

Additional Information
 Jupiter MOID = 2.66462 au 
 T_jup = 3.794 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.291759614167895E-7 3.629021858366898E-9 -1.70154283160684E-6 6.686825713618467E-8 -1.185432788241733E-6 3.012224887158566E-6
q 3.629021858366898E-9 5.80476302842226E-11 -2.738331746861067E-8 1.056791847053519E-9 -1.929479558280166E-8 4.76750592046305E-8
tp -1.70154283160684E-6 -2.738331746861067E-8 1.296668975725913E-5 -4.948280549081667E-7 9.198531439343099E-6 -2.234590320826662E-5
node 6.686825713618467E-8 1.056791847053519E-9 -4.948280549081667E-7 1.954149397201691E-8 -3.43949067822135E-7 8.788843879102503E-7
peri -1.185432788241733E-6 -1.929479558280166E-8 9.198531439343099E-6 -3.43949067822135E-7 6.604885774041535E-6 -1.555862914223408E-5
i 3.012224887158566E-6 4.76750592046305E-8 -2.234590320826662E-5 8.788843879102503E-7 -1.555862914223408E-5 3.959477752625126E-5

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 0.0110523353298833 0.0110233452479436 0.0110813242732743 8.04973627023157 8.01973174218232 2458397.869283257 0.269400110465275 1434.6857640314 10.9495385292698 0.0648103314475452 686.63870305874 T 2 CATAB v2.0g-lin.ifort 2021-Apr-15 20:43:16 2021-Apr-15 20:43
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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