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3988 (1986 LA)
Classification: Amor [NEO]          SPK-ID: 2003988
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 108 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3166237842060108 3.1171e-08  
a 1.544631080716308 3.3264e-09 AU
q 1.05556414273769 4.7781e-08 AU
i 10.76565373204841 5.8206e-06 deg
node 229.8621353641707 2.0075e-05 deg
peri 86.83691151130328 2.5821e-05 deg
M 165.1193322339852 7.4775e-06 deg
tp 2456478.888919036678
(2013-Jul-05.38891904)
1.4338e-05 JED
period 701.1897854742283
1.92
2.265e-06
6.201e-09
d
yr
n .513413069411051 1.6585e-09 deg/d
Q 2.033698018694926 4.3796e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      469  
   data-arc span      10098 days (27.65 yr)  
   first obs. used      1986-06-04  
   last obs. used      2014-01-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .5332  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-09 17:57:16  

Additional Information
 Earth MOID = .177552 AU 
 T_jup = 4.384 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 17.8 mag n/a MPO267723  
diameter diameter 0.7 km n/a Hazards due to Comets and Asteroids (1994), Ed. T. Gehrels, pp.540-543 based on assumed medium albedo (0.15)
rotation period rot_per 10.4 h n/a Asteroid Lightcurve DataBase (Rev. 2013-Sep-12) Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Skiff, B.A. (2011) Posting on CALL web site. http://www.minorplanet.info/call.html]

3988 (1986 LA)          Discovered 1986-Jun-04 by Helin, E. F. at Palomar (675)
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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