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JPL Small-Body Database Browser
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(2018 WR1)
Classification: Apollo [NEO, PHA]          SPK-ID: 3836308
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6448403344686412 1.8189e-06  
a 2.253943260417279 1.0155e-05 au
q .8005097344964611 4.9874e-07 au
i 15.1765086323221 4.7743e-05 deg
node 274.6827988224558 2.5487e-05 deg
peri 244.78086372267 4.0264e-05 deg
M 136.8269002741666 0.00092095 deg
tp 2458530.733672955805
(2019-Feb-16.23367296)
1.6939e-05 TDB
period 1235.984133215358
3.38
0.0083526
2.287e-05
d
yr
n .2912658749619024 1.9683e-06 deg/d
Q 3.707376786338096 1.6703e-05 au
  Orbit Determination Parameters
   # obs. used (total)      183  
   data-arc span      185 days  
   first obs. used      2018-11-27  
   last obs. used      2019-05-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      3  
   norm. resid. RMS      .46785  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-21 06:04:59  

Additional Information
 Earth MOID = .0249377 au 
 Jupiter MOID = 1.69175 au 
 T_jup = 3.280 
[ 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 20.3   .44349 E2019A83 autocmod 2.6q
rotation period rot_per 68.6 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Warner, B.D.; Stephens, R.D. (2019) Minor Planet Bull. 46, 304-314.]

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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