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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2101433930762458 6.0033e-08  
a 2.397331123709831 1.6936e-08 au
q 1.893547827046158 1.3649e-07 au
i 1.393629516144359 3.3526e-06 deg
node 275.3794582187611 0.00020477 deg
peri 88.6347369582615 0.00020518 deg
M 108.9539544063928 1.4839e-05 deg
tp 2458190.172183719837
(2018-Mar-12.67218372)
5.2539e-05 TDB
period 1355.783869118487
3.71
1.4367e-05
3.933e-08
d
yr
n .2655290479551635 2.8138e-09 deg/d
Q 2.901114420373504 2.0495e-08 au
  Orbit Determination Parameters
   # obs. used (total)      339  
   data-arc span      8043 days (22.02 yr)  
   first obs. used      1997-01-31  
   last obs. used      2019-02-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54437  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 13:37:00  

Additional Information
 Earth MOID = .891153 au 
 Jupiter MOID = 2.5595 au 
 T_jup = 3.497 
[ 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 17.4   n/a MPO264607  
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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