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343999 (2011 QJ9)
Classification: Jupiter Trojan          SPK-ID: 2343999
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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0417502877229252 7.1203e-08  
a 5.350905220641702 2.164e-07 au
q 5.127503388101808 3.7021e-07 au
i 1.71354002563835 6.6562e-06 deg
node 182.5437858649753 0.00020315 deg
peri 217.5640296677599 0.00022008 deg
M 200.7516912940143 9.0983e-05 deg
tp 2461200.415482078648
(2026-Jun-08.91548208)
0.0012348 TDB
period 4521.050046927448
12.38
0.00027426
7.509e-07
d
yr
n .0796275193292009 4.8305e-09 deg/d
Q 5.574307053181596 2.2544e-07 au
  Orbit Determination Parameters
   # obs. used (total)      226  
   data-arc span      5989 days (16.40 yr)  
   first obs. used      2004-01-31  
   last obs. used      2020-06-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54543  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 08:30:39  

Additional Information
 Earth MOID = 4.13442 au 
 Jupiter MOID = .122333 au 
 T_jup = 2.998 
[ 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 13.83   n/a E2021B25  
rotation period rot_per 4.35 h n/a LCDB (Rev. 2020-October); 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.]

343999 (2011 QJ9)          Discovered 2006-Mar-02 by Spacewatch at Kitt Peak
Reference: 20121029/Numbers.arcLast Updated: 2012-11-08

Alternate Designations
 2011 QJ9 = 2006 EM7 = 2007 GQ14 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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