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249499 (2009 XV18)
Classification: Main-belt Asteroid          SPK-ID: 2249499
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .139931650463452 4.673e-08  
a 3.03621013562099 3.8376e-08 au
q 2.611348240189683 1.4922e-07 au
i 12.30045743542529 7.3482e-06 deg
node 285.776212430902 2.5545e-05 deg
peri 97.11490280996289 3.9327e-05 deg
M 64.25672830481454 2.6598e-05 deg
tp 2458655.584847419631
(2019-Jun-21.08484742)
0.00014323 TDB
period 1932.396158421115
5.29
3.6637e-05
1.003e-07
d
yr
n .1862972033095646 3.532e-09 deg/d
Q 3.461072031052297 4.3746e-08 au
  Orbit Determination Parameters
   # obs. used (total)      360  
   data-arc span      6432 days (17.61 yr)  
   first obs. used      2002-06-16  
   last obs. used      2020-01-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48633  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 10:24:03  

Additional Information
 Earth MOID = 1.65102 au 
 Jupiter MOID = 2.10959 au 
 T_jup = 3.192 
[ 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 15.2   n/a MPO503176  
diameter diameter 5.827 km 0.362 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.043   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

249499 (2009 XV18)          Discovered 2009-Dec-15 by Mt. Lemmon Survey at Mount Lemmon
Reference: 20100824/Numbers.arcLast Updated: 2010-08-27

[ show close-approach data ]
Alternate Designations
 2009 XV18 = 2008 SY294 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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