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249680 (1999 VH227)
Classification: Main-belt Asteroid          SPK-ID: 2249680
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 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2999474822575801 4.6974e-08  
a 3.013864487767684 1.8828e-08 au
q 2.109863422796236 1.4064e-07 au
i 21.06068470927012 6.0357e-06 deg
node 266.8389432939287 1.8037e-05 deg
peri 55.55190253449528 2.1952e-05 deg
M 1.89144491716343 1.1003e-05 deg
tp 2458990.459040711003
(2020-May-20.95904071)
5.8397e-05 TDB
period 1911.102623839504
5.23
1.7908e-05
4.903e-08
d
yr
n .1883729295901135 1.7652e-09 deg/d
Q 3.917865552739132 2.4475e-08 au
  Orbit Determination Parameters
   # obs. used (total)      581  
   data-arc span      7601 days (20.81 yr)  
   first obs. used      1999-10-13  
   last obs. used      2020-08-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50653  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 17:02:22  

Additional Information
 Earth MOID = 1.16407 au 
 Jupiter MOID = 1.66825 au 
 T_jup = 3.082 
[ 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 14.2   n/a MPO433636  
diameter diameter 9.361 km 0.744 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.042   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

249680 (1999 VH227)          Discovered 1999-Nov-03 by LINEAR at Socorro
Reference: 20100923/Numbers.arcLast Updated: 2010-09-27

[ show close-approach data ]
Alternate Designations
 1999 VH227 = 2004 LM18 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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