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312921 (2011 WF16)
Classification: Main-belt Asteroid          SPK-ID: 2312921
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1583924880601767 4.6616e-08  
a 2.181766598400838 1.267e-08 au
q 1.836191158513541 1.0059e-07 au
i 3.342067482177477 6.2119e-06 deg
node 161.6868729864809 8.563e-05 deg
peri 96.28771211732364 8.8561e-05 deg
M 38.75043060566893 2.4217e-05 deg
tp 2458873.797585238298
(2020-Jan-25.29758524)
7.8735e-05 TDB
period 1177.093224547033
3.22
1.0254e-05
2.807e-08
d
yr
n .305838137959323 2.6642e-09 deg/d
Q 2.527342038288136 1.4677e-08 au
  Orbit Determination Parameters
   # obs. used (total)      242  
   data-arc span      8459 days (23.16 yr)  
   first obs. used      1997-05-31  
   last obs. used      2020-07-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .61594  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 20:09:41  

Additional Information
 Earth MOID = .824821 au 
 Jupiter MOID = 2.52591 au 
 T_jup = 3.661 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457199.5 (2015-Jun-26.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1584701944706272 4.6622e-08  
q 1.835600893929233 1.0051e-07 au
tp 2457696.446085782192
(2016-Nov-03.94608578)
7.5196e-05 TDB
node 161.7195513395558 8.5678e-05 deg
peri 96.23093895753107 8.86e-05 deg
i 3.340877650412408 6.211e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      242  
   data-arc span      8459 days (23.16 yr)  
   first obs. used      1997-05-31  
   last obs. used      2020-07-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .61594  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 20:09:41  

Additional Information
 Jupiter MOID = 2.52591 au 
 T_jup = 3.661 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.173648291678912E-15 -4.660809474320782E-15 -1.24804984084702E-12 3.005300629704363E-14 -3.645967024712795E-13 6.925564940345627E-17
q -4.660809474320782E-15 1.010314144716479E-14 2.9458556343536E-12 -6.886360492298435E-14 8.510070986286999E-13 -7.255143990975973E-17
tp -1.24804984084702E-12 2.9458556343536E-12 5.654382089116208E-9 -5.752949297638444E-11 1.716132874457732E-9 1.973528300636897E-12
node 3.005300629704363E-14 -6.886360492298435E-14 -5.752949297638444E-11 7.340645615181842E-9 -7.343328997566717E-9 1.711418960990986E-10
peri -3.645967024712795E-13 8.510070986286999E-13 1.716132874457732E-9 -7.343328997566717E-9 7.849886579753493E-9 -1.702504662583885E-10
i 6.925564940345627E-17 -7.255143990975973E-17 1.973528300636897E-12 1.711418960990986E-10 -1.702504662583885E-10 3.857656972639512E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 17.5   n/a MPO427651  

312921 (2011 WF16)          Discovered 2000-Mar-26 by LONEOS at Anderson Mesa
Reference: 20120109/Numbers.arcLast Updated: 2012-01-11

Alternate Designations
 2011 WF16 = 2006 AQ18 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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