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249661 (1999 VJ18)
Classification: Main-belt Asteroid          SPK-ID: 2249661
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 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2104039938918114 5.2928e-08  
a 2.396769801949753 1.5756e-08 au
q 1.892479863180239 1.2103e-07 au
i 1.393645570136062 3.2188e-06 deg
node 275.3824021472224 0.00020459 deg
peri 88.58213935744462 0.00020494 deg
M 215.2493037865978 1.5726e-05 deg
tp 2459545.449268063524
(2021-Nov-26.94926806)
6.3916e-05 TDB
period 1355.307723105131
3.71
1.3365e-05
3.659e-08
d
yr
n .265622333483947 2.6193e-09 deg/d
Q 2.901059740719266 1.9072e-08 au
  Orbit Determination Parameters
   # obs. used (total)      362  
   data-arc span      8486 days (23.23 yr)  
   first obs. used      1997-01-31  
   last obs. used      2020-04-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5391  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 13:46:46  

Additional Information
 Earth MOID = .890937 au 
 Jupiter MOID = 2.56305 au 
 T_jup = 3.498 
[ 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 17.3   n/a MPO470664  
diameter diameter 1.952 km 0.427 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.056   0.035 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

249661 (1999 VJ18)          Discovered 1999-Nov-02 by Spacewatch at Kitt Peak
Reference: 20100923/Numbers.arcLast Updated: 2010-09-27

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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