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JPL Small-Body Database Browser
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357005 (1999 HA2)
Classification: Apollo [NEO]          SPK-ID: 2357005
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 44 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6995639888671101 3.8525e-08  
a 2.791090183886221 1.5953e-08 au
q .8385440015589405 1.0941e-07 au
i 15.13962099461709 1.105e-05 deg
node 147.2125237513239 9.8907e-05 deg
peri 344.2495963058412 9.3078e-05 deg
M 204.6201330304266 1.0203e-05 deg
tp 2459735.608552355172
(2022-Jun-05.10855236)
5.4357e-05 TDB
period 1703.174832165893
4.66
1.4603e-05
3.998e-08
d
yr
n .2113699622617105 1.8122e-09 deg/d
Q 4.743636366213503 2.7114e-08 au
  Orbit Determination Parameters
   # obs. used (total)      266  
   data-arc span      5173 days (14.16 yr)  
   first obs. used      1999-04-20  
   last obs. used      2013-06-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56723  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Apr-06 09:22:57  

Additional Information
 Earth MOID = .118789 au 
 Jupiter MOID = .46617 au 
 T_jup = 2.875 
[ 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 17.9   n/a MPO264883  

357005 (1999 HA2)          Discovered 1999-Apr-20 by LINEAR at Socorro
Reference: 20130327/Numbers.arcLast Updated: 2013-03-29

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