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21317 (1996 XV18)
Classification: Main-belt Asteroid          SPK-ID: 2021317
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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03828091958044619 3.948e-08  
a 2.541238160326084 1.2139e-08 au
q 2.44395722667588 1.0323e-07 au
i 3.621010083964504 4.6263e-06 deg
node 216.4879872181376 6.4026e-05 deg
peri 222.4672275779453 9.0265e-05 deg
M 1.06993100654968 6.4244e-05 deg
tp 2459196.102359212110
(2020-Dec-12.60235921)
0.00026406 TDB
period 1479.675487437042
4.05
1.0602e-05
2.903e-08
d
yr
n .2432965897296567 1.7432e-09 deg/d
Q 2.638519093976288 1.2603e-08 au
  Orbit Determination Parameters
   # obs. used (total)      681  
   data-arc span      8804 days (24.10 yr)  
   first obs. used      1996-12-12  
   last obs. used      2021-01-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50327  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 02:51:58  

Additional Information
 Earth MOID = 1.46001 au 
 Jupiter MOID = 2.44696 au 
 T_jup = 3.441 
[ 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 MPO439243  
diameter diameter 2.698 km 0.838 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.202   0.094 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21317 (1996 XV18)          Discovered 1996-Dec-12 by Klet at Klet
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1996 XV18 = 1998 KL3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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