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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 ]

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Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1430789116076634 1.5866e-07  
a 2.536894290326991 1.6056e-08 au
q 2.173918216403309 4.0667e-07 au
i 5.946306407319853 9.5536e-06 deg
node 204.1695758573208 4.5791e-05 deg
peri 28.68433677595264 5.9853e-05 deg
M 144.3804357012467 3.1088e-05 deg
tp 2456808.587064966538
(2014-May-31.08706497)
0.00012498 JED
period 1475.883180273616
4.04
1.4011e-05
3.836e-08
d
yr
n .2439217444928528 2.3156e-09 deg/d
Q 2.899870364250672 1.8353e-08 au
  Orbit Determination Parameters
   # obs. used (total)      483  
   data-arc span      22884 days (62.65 yr)  
   first obs. used      1953-04-15  
   last obs. used      2015-12-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53746  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 14:47:03  

Additional Information
 Earth MOID = 1.16477 au 
 Jupiter MOID = 2.0895 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 15.7 mag n/a MPO347826  

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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