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118321 (1998 XS12)
Classification: Main-belt Asteroid          SPK-ID: 2118321
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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1180800945050688 5.8754e-08  
a 2.33106786215069 1.0209e-08 au
q 2.055815148690207 1.3908e-07 au
i 7.641705970060512 3.8648e-06 deg
node 89.1153688929997 4.8604e-05 deg
peri 299.8071897891094 5.3225e-05 deg
M 101.095931533635 2.0605e-05 deg
tp 2458835.441907815621
(2019-Dec-17.94190782)
7.4237e-05 TDB
period 1299.962433628224
3.56
8.54e-06
2.338e-08
d
yr
n .2769310794583749 1.8193e-09 deg/d
Q 2.606320575611172 1.1415e-08 au
  Orbit Determination Parameters
   # obs. used (total)      593  
   data-arc span      8145 days (22.30 yr)  
   first obs. used      1998-12-15  
   last obs. used      2021-04-03  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .58473  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 09:00:59  

Additional Information
 Earth MOID = 1.07293 au 
 Jupiter MOID = 2.80804 au 
 T_jup = 3.550 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.22   n/a MPCxxxxx  

118321 (1998 XS12)          Discovered 1998-Dec-15 by Korlevic, K. at Visnjan
Reference: 20051116/Numbers.arcLast Updated: 2005-11-21

Alternate Designations
 1998 XS12 = 2001 OU64 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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