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118231 (1996 XQ18)
Classification: Main-belt Asteroid          SPK-ID: 2118231
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2917759083238438 4.0473e-08  
a 2.711582532863299 1.5379e-08 au
q 1.920408076342041 1.1478e-07 au
i 15.52667785506484 6.34e-06 deg
node 9.411559115348403 1.4271e-05 deg
peri 45.99087710041602 1.8833e-05 deg
M 105.1276425148589 1.0928e-05 deg
tp 2458524.236726066067
(2019-Feb-09.73672607)
4.7411e-05 TDB
period 1630.920036963469
4.47
1.3875e-05
3.799e-08
d
yr
n .2207343044667392 1.8779e-09 deg/d
Q 3.502756989384557 1.9867e-08 au
  Orbit Determination Parameters
   # obs. used (total)      640  
   data-arc span      8560 days (23.44 yr)  
   first obs. used      1996-12-08  
   last obs. used      2020-05-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52923  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 18:13:00  

Additional Information
 Earth MOID = .961457 au 
 Jupiter MOID = 2.08515 au 
 T_jup = 3.249 
[ 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 15.6   n/a MPO453653  
diameter diameter 4.743 km 1.332 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  
geometric albedo albedo 0.050   0.033 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  

118231 (1996 XQ18)          Discovered 1996-Dec-08 by Hergenrother, C. W. at Catalina Station
Reference: 20051116/Numbers.arcLast Updated: 2005-11-21
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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