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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2918889500543998 4.049e-08  
a 2.711116788844447 1.5362e-08 au
q 1.919771755873785 1.1481e-07 au
i 15.52836297491977 6.3395e-06 deg
node 9.412867970008637 1.4254e-05 deg
peri 45.95688909919355 1.882e-05 deg
M 149.3206054449479 1.1127e-05 deg
tp 2458524.202148237445
(2019-Feb-09.70214824)
4.7348e-05 TDB
period 1630.499862420409
4.46
1.3858e-05
3.794e-08
d
yr
n .2207911869833555 1.8766e-09 deg/d
Q 3.502461821815108 1.9846e-08 au
  Orbit Determination Parameters
   # obs. used (total)      644  
   data-arc span      8560 days (23.44 yr)  
   first obs. used      1996-12-08  
   last obs. used      2020-05-16  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52769  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 16:56:18  

Additional Information
 Earth MOID = .95992 au 
 Jupiter MOID = 2.08639 au 
 T_jup = 3.250 
[ 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 15.64   n/a E2021B55  
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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