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193921 (2001 QE287)
Classification: Main-belt Asteroid          SPK-ID: 2193921
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1450151614690257 6.7462e-08  
a 2.304022776706803 1.2371e-08 au
q 1.969904541714353 1.5596e-07 au
i 3.861245443126184 5.5141e-06 deg
node 300.0357386391414 0.00010449 deg
peri 86.07071795951735 0.00010655 deg
M 98.19923299496972 2.0743e-05 deg
tp 2458652.055050691671
(2019-Jun-17.55505069)
7.2704e-05 TDB
period 1277.404903533454
3.50
1.0288e-05
2.817e-08
d
yr
n .2818213700324753 2.2697e-09 deg/d
Q 2.638141011699252 1.4165e-08 au
  Orbit Determination Parameters
   # obs. used (total)      452  
   data-arc span      6776 days (18.55 yr)  
   first obs. used      2001-07-14  
   last obs. used      2020-02-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46926  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 22:11:51  

Additional Information
 Earth MOID = .978485 au 
 Jupiter MOID = 2.8186 au 
 T_jup = 3.572 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.3   n/a MPO494073  
diameter diameter 3.572 km 0.287 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.046   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

193921 (2001 QE287)          Discovered 2001-Aug-17 by LINEAR at Socorro
Reference: 20081113/Numbers.arcLast Updated: 2008-11-17

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