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362221 (2009 HW78)
Classification: Main-belt Asteroid          SPK-ID: 2362221
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1304037509659952 4.8137e-08  
a 2.444665014720927 2.8311e-08 au
q 2.125871526945978 1.2296e-07 au
i 14.97951009180044 6.5708e-06 deg
node 36.39171222764996 1.9004e-05 deg
peri 244.9596898943558 3.8424e-05 deg
M 310.4230924248009 4.0201e-05 deg
tp 2459392.766843243421
(2021-Jun-27.26684324)
0.00015796 TDB
period 1396.135155518595
3.82
2.4252e-05
6.64e-08
d
yr
n .2578546916299645 4.4792e-09 deg/d
Q 2.763458502495876 3.2003e-08 au
  Orbit Determination Parameters
   # obs. used (total)      254  
   data-arc span      5523 days (15.12 yr)  
   first obs. used      2005-03-16  
   last obs. used      2020-04-29  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .63622  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 09:38:41  

Additional Information
 Earth MOID = 1.1545 au 
 Jupiter MOID = 2.3969 au 
 T_jup = 3.441 
[ 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 16.52   n/a E2021B25  

362221 (2009 HW78)          Discovered 2009-Apr-26 by Spacewatch at Kitt Peak
Reference: Last Updated: 2013-04-29

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