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42924 Betlem (1999 TJ2)
Classification: Main-belt Asteroid          SPK-ID: 2042924
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2209391186207426 3.8835e-08  
a 2.35533912543152 6.7676e-09 au
q 1.834952575005729 9.3026e-08 au
i 2.873708076536625 4.9824e-06 deg
node 196.7517492978126 5.869e-05 deg
peri 140.0320434203419 5.9624e-05 deg
M 281.6613696137314 8.7545e-06 deg
tp 2459287.810878492501
(2021-Mar-14.31087849)
3.2292e-05 TDB
period 1320.318159090895
3.61
5.6905e-06
1.558e-08
d
yr
n .2726615532182622 1.1752e-09 deg/d
Q 2.87572567585731 8.2629e-09 au
  Orbit Determination Parameters
   # obs. used (total)      875  
   data-arc span      9624 days (26.35 yr)  
   first obs. used      1994-03-10  
   last obs. used      2020-07-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5289  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 00:04:41  

Additional Information
 Earth MOID = .826811 au 
 Jupiter MOID = 2.51858 au 
 T_jup = 3.520 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.2   n/a MPO231687  

42924 Betlem           Discovered 1999 Oct. 2 at Ondřejov.
Hans Betlem (b. 1954), Dutch amateur meteor astronomer and founder of the Dutch Meteor Society, is well known for his photographic observations of major meteor streams and has published many precise trajectories and orbits of meteors. He has organized several successful Leonid expeditions.
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
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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