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18873 Larryrobinson (1999 VJ22)
Classification: Main-belt Asteroid          SPK-ID: 2018873
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 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2111057873293862 3.3523e-08  
a 2.406264070245313 1.2064e-08 au
q 1.898287799173763 8.1783e-08 au
i 9.205325956071555 3.8901e-06 deg
node 117.9805099228978 2.4356e-05 deg
peri 189.3167908131017 2.7243e-05 deg
M 310.2152670821735 1.7299e-05 deg
tp 2459389.041534411450
(2021-Jun-23.54153441)
6.6698e-05 TDB
period 1363.368816302678
3.73
1.0253e-05
2.807e-08
d
yr
n .2640518073284707 1.9858e-09 deg/d
Q 2.914240341316863 1.4611e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1104  
   data-arc span      10507 days (28.77 yr)  
   first obs. used      1991-07-10  
   last obs. used      2020-04-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51704  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:40:31  

Additional Information
 Earth MOID = .881921 au 
 Jupiter MOID = 2.3461 au 
 T_jup = 3.475 
[ 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 15.15   n/a E2021B10  
diameter diameter 3.517 km 0.076 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.082   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18873 Larryrobinson           Discovered 1999 Nov. 13 by M. Abraham and G. Fedon at the Everstar Observatory.
Larry Robinson, an inspirational leader in the amateur minor-planet observing community, spent countless hours at the Sunflower Observatory confirming, following and discovering many objects, as well as assisting numerous amateurs. He has trained over 50 people in science of minor planets and inspired many others.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20010109/MPCPages.arcLast Updated: 2009-05-11

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Alternate Designations
 1999 VJ22 = 1991 NB6 = 1998 HO109 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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