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528991 (2009 HE82)
Classification: Mars-crossing Asteroid          SPK-ID: 2528991
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 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1031774933465255 1.2071e-07  
a 1.467048992584995 7.7467e-09 au
q 1.31568255491353 1.7945e-07 au
i 30.5013291781115 1.2158e-05 deg
node 227.2489570714673 1.307e-05 deg
peri 144.1606757681215 4.0349e-05 deg
M 68.59124590265762 3.5036e-05 deg
tp 2459076.839344615969
(2020-Aug-15.33934462)
6.318e-05 TDB
period 649.0308690620559
1.78
5.1408e-06
1.407e-08
d
yr
n .5546731552541598 4.3934e-09 deg/d
Q 1.61841543025646 8.546e-09 au
  Orbit Determination Parameters
   # obs. used (total)      187  
   data-arc span      3481 days (9.53 yr)  
   first obs. used      2009-04-29  
   last obs. used      2018-11-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46899  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 19:41:36  

Additional Information
 Earth MOID = .345231 au 
 Jupiter MOID = 3.65084 au 
 T_jup = 4.457 
[ 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 18.7   n/a E2018P03  

528991 (2009 HE82)          Discovered 2009-Apr-29 by Mt. Lemmon Survey at Mount Lemmon
Reference: Last Updated: 2019-05-29

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