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101861 (1999 LA4)
Classification: Inner Main-belt Asteroid          SPK-ID: 2101861
[ 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 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03264203691107406 5.2015e-08  
a 1.94072200763842 8.4374e-09 au
q 1.877372888230953 1.0221e-07 au
i 20.95492398740655 5.8404e-06 deg
node 244.4663529585671 1.3076e-05 deg
peri 352.9003697273713 8.0657e-05 deg
M 293.3900840965839 8.23e-05 deg
tp 2459183.217358273482
(2020-Nov-29.71735827)		 0.00022613 TDB
period 987.5143675880279
2.70		 6.4399e-06
1.763e-08		 d
yr
n .3645516579969246 2.3774e-09 deg/d
Q 2.004071127045887 8.7128e-09 au
   Orbit Determination Parameters
   # obs. used (total)      549  
   data-arc span      8100 days (22.18 yr)  
   first obs. used      1997-12-22  
   last obs. used      2020-02-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51257  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 19:58:07  

Additional Information
 Earth MOID = .864782 au 
 Jupiter MOID = 3.01698 au 
 T_jup = 3.821 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.1   n/a MPO453473  

101861 (1999 LA4)          Discovered 1999-Jun-09 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

Alternate Designations
 1999 LA4 = 2004 FF16 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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