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215544 (2002 XH18)
Classification: Main-belt Asteroid          SPK-ID: 2215544
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1488779035034341 4.9148e-08  
a 2.62060657841774 1.9916e-08 au
q 2.230456165115599 1.2677e-07 au
i 5.583708909140315 5.3647e-06 deg
node 84.94430089441006 6.2058e-05 deg
peri 5.695447004575921 6.5563e-05 deg
M 33.9319014706092 2.1789e-05 deg
tp 2458854.448216842398
(2020-Jan-05.94821684)
9.3168e-05 TDB
period 1549.534204037427
4.24
1.7664e-05
4.836e-08
d
yr
n .2323278821867844 2.6485e-09 deg/d
Q 3.010756991719881 2.2881e-08 au
  Orbit Determination Parameters
   # obs. used (total)      273  
   data-arc span      6304 days (17.26 yr)  
   first obs. used      2002-10-29  
   last obs. used      2020-02-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60419  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 03:24:34  

Additional Information
 Earth MOID = 1.2471 au 
 Jupiter MOID = 2.1813 au 
 T_jup = 3.382 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456875.5 (2014-Aug-06.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1472051756823092 4.9412e-08  
q 2.235417783830132 1.2733e-07 au
tp 2457305.642133765316
(2015-Oct-10.14213377)
8.9715e-05 TDB
node 85.02215129759361 6.2108e-05 deg
peri 5.826198178315531 6.5702e-05 deg
i 5.581199586476053 5.3628e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      273  
   data-arc span      6304 days (17.26 yr)  
   first obs. used      2002-10-29  
   last obs. used      2020-02-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60419  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 03:24:34  

Additional Information
 Jupiter MOID = 2.1813 au 
 T_jup = 3.382 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.441571992455848E-15 -6.237475992045624E-15 1.949691696799858E-12 3.388878453405019E-14 4.43610506187495E-13 1.164424923212741E-15
q -6.237475992045624E-15 1.621349853565148E-14 -4.839806414500465E-12 -8.544898215436448E-14 -1.120511638616988E-12 -2.450084528803916E-15
tp 1.949691696799858E-12 -4.839806414500465E-12 8.04875053671902E-9 5.308601813974919E-11 1.965366619647049E-9 3.231811232045222E-12
node 3.388878453405019E-14 -8.544898215436448E-14 5.308601813974919E-11 3.857411851885644E-9 -3.825826564850414E-9 1.154233371573281E-10
peri 4.43610506187495E-13 -1.120511638616988E-12 1.965366619647049E-9 -3.825826564850414E-9 4.316720469795356E-9 -1.141268938000132E-10
i 1.164424923212741E-15 -2.450084528803916E-15 3.231811232045222E-12 1.154233371573281E-10 -1.141268938000132E-10 2.87594683366711E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.8   n/a MPO454548  

215544 (2002 XH18)          Discovered 2002-Dec-05 by LINEAR at Socorro
Reference: 20090607/Numbers.arcLast Updated: 2009-06-08
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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