Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.


JPL Small-Body Database Browser
Search: [ help ]  
20689 Zhuyuanchen (1999 VF63)
Classification: Main-belt Asteroid          SPK-ID: 2020689
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1446295200264645 3.4502e-08  
a 2.762733220343816 1.2461e-08 au
q 2.363160440724321 9.5212e-08 au
i 9.715519153453053 4.8796e-06 deg
node 43.69150505182346 2.7201e-05 deg
peri 31.63031454587748 3.3734e-05 deg
M 61.70934165047919 1.8856e-05 deg
tp 2458312.988471136985
(2018-Jul-13.48847114)
8.7735e-05 TDB
period 1677.284955929875
4.59
1.1348e-05
3.107e-08
d
yr
n .2146325814986033 1.4522e-09 deg/d
Q 3.16230599996331 1.4264e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1441  
   data-arc span      9873 days (27.03 yr)  
   first obs. used      1992-04-26  
   last obs. used      2019-05-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48041  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 02:54:41  

Additional Information
 Earth MOID = 1.38341 au 
 Jupiter MOID = 2.166 au 
 T_jup = 3.305 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.8   n/a MPO337433  
diameter diameter 4.236 km 0.240 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.326   0.062 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20689 Zhuyuanchen           Discovered 1999 Nov. 4 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Zhu Yuanchen (b. 1985) was awarded first place and Best in Category in the 2004 Intel International Science and Engineering Fair for his computer science project. He also received the Intel Foundation Young Scientist Award and the Seaborg SIYSS Award. He attends the Shanghai Foreign Language School, Shanghai, China.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20041226/MPCPages.arcLast Updated: 2004-12-25
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Jan-27 13:21 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin