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266587 (2008 HN49)
Classification: Main-belt Asteroid          SPK-ID: 2266587
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 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .19826853675139 3.7878e-08  
a 2.373676916063115 1.0612e-08 au
q 1.903051467194729 9.2663e-08 au
i 4.48778144380154 5.3605e-06 deg
node 339.6130532264349 6.0248e-05 deg
peri 284.8901252873719 6.1918e-05 deg
M 76.14246203281763 1.4442e-05 deg
tp 2458717.976062065441
(2019-Aug-22.47606207)
5.3192e-05 TDB
period 1335.767388406808
3.66
8.9581e-06
2.453e-08
d
yr
n .2695080020102737 1.8074e-09 deg/d
Q 2.844302364931501 1.2717e-08 au
  Orbit Determination Parameters
   # obs. used (total)      398  
   data-arc span      7026 days (19.24 yr)  
   first obs. used      2001-07-29  
   last obs. used      2020-10-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53152  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-11 22:24:40  

Additional Information
 Earth MOID = .893435 au 
 Jupiter MOID = 2.26318 au 
 T_jup = 3.512 
[ 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 16.9   n/a MPO476120  

266587 (2008 HN49)          Discovered 2008-Apr-29 by Mt. Lemmon Survey at Mount Lemmon
Reference: 20110218/Numbers.arcLast Updated: 2011-02-22

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