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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1428597670675877 1.8863e-07  
a 2.537062408548325 1.9228e-08 AU
q 2.174618263827178 4.8695e-07 AU
i 5.945274998493023 1.2525e-05 deg
node 204.1779922111864 6.7621e-05 deg
peri 28.69394551921491 7.7783e-05 deg
M 46.822562582447 3.0857e-05 deg
tp 2456808.523605665278
(2014-May-31.02360567)
0.00012573 JED
period 1476.02989133296
4.04
1.678e-05
4.594e-08
d
yr
n .2438974997145176 2.7727e-09 deg/d
Q 2.899506553269471 2.1975e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      355  
   data-arc span      22354 days (61.20 yr)  
   first obs. used      1953-04-15  
   last obs. used      2014-06-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53364  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Nov-10 14:21:23  

Additional Information
 Earth MOID = 1.16782 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 15.6 mag n/a MPO302311  

42981 Jenniskens           Discovered 1999 Oct. 2 at Ondřejov.
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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