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309212 (2007 JS9)
Classification: Main-belt Asteroid          SPK-ID: 2309212
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2173570334334126 4.577e-08  
a 2.419753117383577 1.6284e-08 au
q 1.89380275814783 1.0787e-07 au
i 3.92116682068268 4.2859e-06 deg
node 90.4667951993752 0.00011776 deg
peri 200.8469601762164 0.00011932 deg
M 123.7507420011097 2.0515e-05 deg
tp 2458527.892809681972
(2019-Feb-13.39280968)
7.657e-05 TDB
period 1374.849037373566
3.76
1.3878e-05
3.8e-08
d
yr
n .2618469302547745 2.6431e-09 deg/d
Q 2.945703476619324 1.9823e-08 au
  Orbit Determination Parameters
   # obs. used (total)      278  
   data-arc span      7014 days (19.20 yr)  
   first obs. used      2000-08-29  
   last obs. used      2019-11-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54516  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 21:23:23  

Additional Information
 Earth MOID = .878179 au 
 Jupiter MOID = 2.24446 au 
 T_jup = 3.479 
[ 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 16.8   n/a MPO446467  

309212 (2007 JS9)          Discovered 2007-May-10 by Lowe, A. at Mayhill
Reference: 20111210/Numbers.arcLast Updated: 2011-12-12

[ show close-approach data ]
Alternate Designations
 2007 JS9 = 2000 QE204 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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