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118444 (1999 VK20)
Classification: Main-belt Asteroid          SPK-ID: 2118444
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .222793952843099 3.4128e-08  
a 3.104927719353197 2.0496e-08 au
q 2.41316859946639 1.0934e-07 au
i 15.32992300972086 8.346e-06 deg
node 339.7797144523853 1.5499e-05 deg
peri 83.93356899809802 2.5491e-05 deg
M 293.974272349045 2.0396e-05 deg
tp 2459567.010451890116
(2021-Dec-18.51045189)
0.0001145 TDB
period 1998.368929426459
5.47
1.9787e-05
5.417e-08
d
yr
n .180146916166937 1.7838e-09 deg/d
Q 3.796686839240003 2.5063e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1099  
   data-arc span      7776 days (21.29 yr)  
   first obs. used      1999-09-08  
   last obs. used      2020-12-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47691  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 09:19:39  

Additional Information
 Earth MOID = 1.4828 au 
 Jupiter MOID = 1.86769 au 
 T_jup = 3.128 
[ 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 13.76   n/a E2021B55  
diameter diameter 4.879 km 0.580 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.269   0.047 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

118444 (1999 VK20)          Discovered 1999-Nov-11 by Juels, C. W. at Fountain Hills
Reference: 20051116/Numbers.arcLast Updated: 2005-11-21

[ show close-approach data ]
Alternate Designations
 1999 VK20 = 2001 BR68 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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