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321326 (2009 HJ77)
Classification: Main-belt Asteroid          SPK-ID: 2321326
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 .1459239966283411 5.4786e-08  
a 2.260639899588603 1.3832e-08 au
q 1.930758290503142 1.2301e-07 au
i 6.200244564003493 8.8831e-06 deg
node 204.0207806097328 5.5751e-05 deg
peri 40.91531080744043 6.5639e-05 deg
M 77.67315908931681 3.5861e-05 deg
tp 2458732.636229472386
(2019-Sep-06.13622947)
0.00012316 TDB
period 1241.496528795161
3.40
1.1394e-05
3.12e-08
d
yr
n .2899726190530474 2.6613e-09 deg/d
Q 2.590521508674063 1.585e-08 au
  Orbit Determination Parameters
   # obs. used (total)      144  
   data-arc span      6770 days (18.54 yr)  
   first obs. used      2002-04-04  
   last obs. used      2020-10-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54574  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-11 18:15:30  

Additional Information
 Earth MOID = .922974 au 
 Jupiter MOID = 2.42529 au 
 T_jup = 3.598 
[ 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 17.7   n/a MPO427673  

321326 (2009 HJ77)          Discovered 2009-Apr-29 by Lowe, A. at Mayhill
Reference: 20120308/Numbers.arcLast Updated: 2012-03-13

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