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42981 Jenniskens (1999 TY224)
Classification: Main-belt Asteroid          SPK-ID: 2042981
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 3 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1427356761367381 2.2229e-07  
a 2.536712449437876 2.1239e-08 AU
q 2.17463308280288 5.6864e-07 AU
i 5.945567065062462 1.4668e-05 deg
node 204.1831535821328 7.7777e-05 deg
peri 28.68161926400662 9.0446e-05 deg
M 358.0495223945981 3.7244e-05 deg
tp 2456808.495465521626
(2014-May-30.99546552)
0.00015271 JED
period 1475.724499380901
4.04
1.8534e-05
5.074e-08
d
yr
n .2439479727761028 3.0638e-09 deg/d
Q 2.898791816072872 2.4271e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      305  
   data-arc span      22272 days (60.98 yr)  
   first obs. used      1953-04-15  
   last obs. used      2014-04-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .56058  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Apr-17 14:45:26  

Additional Information
 Earth MOID = 1.16642 AU 
 T_jup = 3.426 
[ 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 15.5 mag n/a MPO250617  

42981 Jenniskens           Discovered 1999 Oct. 2 at Ondrejov.
Peter Jenniskens (b. 1962), meteor astronomer of NASA Ames, organized several successful airborne missions (Leonid multi-instrument aircraft campaigns) to observe the Leonid returns from 1998 to 2002. He has substantially improved our knowledge of the behavior of meteor streams.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20021120/MPCPages.arcLast Updated: 2003-10-02

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