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(2009 XH8)
Classification: Amor [NEO]          SPK-ID: 3483649
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

[ hide orbit diagram ]

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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .47892247843968 0.00010301  
a 2.06719272097019 0.00039985 au
q 1.077167659630681 4.5971e-06 au
i 4.923951707565012 0.00083345 deg
node 79.32315975486003 0.0018093 deg
peri 1.52048013926091 0.0033958 deg
M 186.272515774775 0.40838 deg
tp 2459524.384931871572
(2021-Nov-05.88493187)
1.3835 TDB
period 1085.600107057682
2.97
0.31497
0.0008623
d
yr
n .3316138213874291 9.6213e-05 deg/d
Q 3.057217782309699 0.00059134 au
  Orbit Determination Parameters
   # obs. used (total)      31  
   data-arc span      55 days  
   first obs. used      2009-12-15  
   last obs. used      2010-02-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      6  
   norm. resid. RMS      .40658  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Apr-06 08:58:45  

Additional Information
 Earth MOID = .0929753 au 
 Jupiter MOID = 2.22149 au 
 T_jup = 3.620 
[ hide covariance matrix ]
Orbital Elements at Epoch 2455188.5 (2009-Dec-23.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4794004741022358 0.00010941  
q 1.076645304738343 1.8869e-05 au
tp 2455182.391051840003
(2009-Dec-16.89105184)
0.00046069 TDB
node 79.37923976493856 0.00077902 deg
peri 1.39138210982995 0.00051186 deg
i 4.924912098456962 0.00076619 deg
  Orbit Determination Parameters
   # obs. used (total)      31  
   data-arc span      55 days  
   first obs. used      2009-12-15  
   last obs. used      2010-02-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      6  
   norm. resid. RMS      .40658  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Apr-06 08:58:45  

Additional Information
 Jupiter MOID = 2.22149 au 
 T_jup = 3.620 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.197030018564876E-8 2.064028882264286E-9 2.494991205031481E-8 -8.496921959183248E-8 2.939775296639068E-8 8.368049837016035E-8
q 2.064028882264286E-9 3.560499520864935E-10 4.419494477019457E-9 -1.465858136660045E-8 5.196066786802541E-9 1.442070757371286E-8
tp 2.494991205031481E-8 4.419494477019457E-9 2.122382076635324E-7 -1.837032137360105E-7 2.341267612406807E-7 1.604371718436019E-7
node -8.496921959183248E-8 -1.465858136660045E-8 -1.837032137360105E-7 6.068646599844008E-7 -2.19137594257234E-7 -5.930854118823841E-7
peri 2.939775296639068E-8 5.196066786802541E-9 2.341267612406807E-7 -2.19137594257234E-7 2.620008108857672E-7 1.90028411177803E-7
i 8.368049837016035E-8 1.442070757371286E-8 1.604371718436019E-7 -5.930854118823841E-7 1.90028411177803E-7 5.870428000264344E-7

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 23.2   n/a MPO172390  

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