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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.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1457057230773593 5.4512e-08  
a 2.260676624746563 1.3612e-08 au
q 1.931283102493781 1.2214e-07 au
i 6.20000370173004 8.8042e-06 deg
node 204.0168340984093 5.3715e-05 deg
peri 40.86075651870969 6.3824e-05 deg
M 192.5901910107004 3.6113e-05 deg
tp 2459973.843781730709
(2023-Jan-29.34378173)
0.00012596 TDB
period 1241.52678196019
3.40
1.1213e-05
3.07e-08
d
yr
n .2899655530842537 2.6189e-09 deg/d
Q 2.590070146999345 1.5595e-08 au
  Orbit Determination Parameters
   # obs. used (total)      147  
   data-arc span      6790 days (18.59 yr)  
   first obs. used      2002-04-04  
   last obs. used      2020-11-05  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54261  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 07:05:04  

Additional Information
 Earth MOID = .923783 au 
 Jupiter MOID = 2.42325 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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