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442529 (2011 WT121)
Classification: Main-belt Asteroid          SPK-ID: 2442529
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2166579757825461 9.6617e-08  
a 3.065918067765095 4.5496e-08 au
q 2.401662465287974 3.0529e-07 au
i 4.972399298334973 9.6227e-06 deg
node 288.7004240665459 8.7614e-05 deg
peri 158.8559889672198 9.0146e-05 deg
M 205.3683614272318 2.52e-05 deg
tp 2459842.738522183959
(2022-Sep-20.23852218)
0.00015188 TDB
period 1960.826844912073
5.37
4.3646e-05
1.195e-07
d
yr
n .1835960176361942 4.0867e-09 deg/d
Q 3.730173670242215 5.5353e-08 au
  Orbit Determination Parameters
   # obs. used (total)      85  
   data-arc span      6758 days (18.50 yr)  
   first obs. used      2000-11-30  
   last obs. used      2019-06-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53584  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 07:43:21  

Additional Information
 Earth MOID = 1.41889 au 
 Jupiter MOID = 1.5 au 
 T_jup = 3.190 
[ show covariance matrix ]

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 16.6   n/a MPO437721  
rotation period rot_per 1.35 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 lower-limit; Incomplete or inconclusive result.
Published Reference List:
[Erasmus, N.; McNeill, A.; Mommert, N.; Trilling, D.E.; et al. (2019) Ap. J. Suppl. Series 242, A15.]

442529 (2011 WT121)          Discovered 2006-Nov-28 by Mt. Lemmon Survey at Mount Lemmon
Reference: Last Updated: 2015-09-02

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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