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231660 (2009 XK2)
Classification: Main-belt Asteroid          SPK-ID: 2231660
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1014749791956111 5.1009e-08  
a 2.234264699899142 1.4059e-08 au
q 2.007542735959388 1.1148e-07 au
i 5.366915956688455 5.2589e-06 deg
node 268.0711935020132 5.6668e-05 deg
peri 221.9390968485045 6.285e-05 deg
M 27.04965485624521 2.7107e-05 deg
tp 2458908.844276467138
(2020-Feb-29.34427647)
9.1663e-05 TDB
period 1219.832957100084
3.34
1.1513e-05
3.152e-08
d
yr
n .2951223754896983 2.7855e-09 deg/d
Q 2.460986663838896 1.5485e-08 au
  Orbit Determination Parameters
   # obs. used (total)      315  
   data-arc span      6291 days (17.22 yr)  
   first obs. used      2002-11-12  
   last obs. used      2020-02-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55657  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 06:57:24  

Additional Information
 Earth MOID = 1.02623 au 
 Jupiter MOID = 2.59243 au 
 T_jup = 3.627 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 17.0   n/a MPO454671  
diameter diameter 1.331 km 0.088 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.144   0.028 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

231660 (2009 XK2)          Discovered 2009-Dec-11 by Mayhill at Mayhill
Reference: 20100130/Numbers.arcLast Updated: 2010-02-01

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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