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312957 (1997 JQ9)
Classification: Main-belt Asteroid          SPK-ID: 2312957
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 .1186418239670548 5.1619e-08  
a 3.089301756773643 4.208e-08 au
q 2.722781361565391 1.7119e-07 au
i 14.06915668485737 1.3385e-05 deg
node 133.4304275262481 2.4376e-05 deg
peri 95.90709474447993 8.5073e-05 deg
M 90.51491761465822 7.8379e-05 deg
tp 2458501.837645082369
(2019-Jan-18.33764508)
0.00042575 TDB
period 1983.302338456479
5.43
4.0523e-05
1.109e-07
d
yr
n .1815154417052585 3.7087e-09 deg/d
Q 3.455822151981895 4.7073e-08 au
  Orbit Determination Parameters
   # obs. used (total)      151  
   data-arc span      8486 days (23.23 yr)  
   first obs. used      1997-05-06  
   last obs. used      2020-07-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43275  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 20:09:41  

Additional Information
 Earth MOID = 1.75857 au 
 Jupiter MOID = 1.76336 au 
 T_jup = 3.169 
[ 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 16.1   n/a MPO437381  

312957 (1997 JQ9)          Discovered 1997-May-06 by Spacewatch at Kitt Peak
Reference: 20120207/Numbers.arcLast Updated: 2012-02-09

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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