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42981 Jenniskens (1999 TY224)
Classification: Main-belt Asteroid          SPK-ID: 2042981
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1429383414894593 9.5357e-08  
a 2.537118784974738 1.2699e-08 au
q 2.174467233688697 2.4499e-07 au
i 5.944603213922462 7.1562e-06 deg
node 204.1554209032714 3.185e-05 deg
peri 28.43339902707583 4.0749e-05 deg
M 223.7835318863841 2.2691e-05 deg
tp 2459759.017445347728
(2022-Jun-28.51744535)
9.5359e-05 TDB
period 1476.079090213057
4.04
1.1082e-05
3.034e-08
d
yr
n .2438893704185172 1.831e-09 deg/d
Q 2.899770336260779 1.4514e-08 au
  Orbit Determination Parameters
   # obs. used (total)      694  
   data-arc span      24750 days (67.76 yr)  
   first obs. used      1953-04-15  
   last obs. used      2021-01-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51401  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 09:14:38  

Additional Information
 Earth MOID = 1.16483 au 
 Jupiter MOID = 2.09028 au 
 T_jup = 3.426 
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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.6   n/a MPO436077  
diameter diameter 2.603 km 0.315 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.164   0.042 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

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

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