Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Near-Earth Object (NEO) Program
Search JPL
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
21711 Wilfredwong (1999 RE95)
Classification: Main-belt Asteroid          SPK-ID: 2021711
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1713145227492474 7.1338e-08  
a 2.469956895412075 2.135e-08 au
q 2.046817408663343 1.8059e-07 au
i 11.40455766782824 7.4283e-06 deg
node 192.6486741505666 2.8045e-05 deg
peri 8.488941675056111 3.4491e-05 deg
M 281.1487011130634 2.4168e-05 deg
tp 2457911.055223991541
(2017-Jun-06.55522399)
9.6431e-05 JED
period 1417.857184537475
3.88
1.8384e-05
5.033e-08
d
yr
n .2539042746519192 3.2921e-09 deg/d
Q 2.893096382160808 2.5008e-08 au
  Orbit Determination Parameters
   # obs. used (total)      859  
   data-arc span      8916 days (24.41 yr)  
   first obs. used      1991-09-15  
   last obs. used      2016-02-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .54668  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Feb-25 19:34:09  

Additional Information
 Earth MOID = 1.04478 au 
 Jupiter MOID = 2.06449 au 
 T_jup = 3.437 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.3 mag n/a MPO358836  

21711 Wilfredwong           Discovered 1999 Sept. 7 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Wilfred Chung-Him Wong (b. 1988) was awarded second place in the 2006 Intel International Science and Engineering Fair for his engineering team project. He attends the Herricks Senior High School, New Hyde Park, New York, U.S.A.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20060711/MPCPages.arcLast Updated: 2006-07-17

[ show close-approach data ]
Alternate Designations
 1999 RE95 = 1994 JL9 = 1998 ME8 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2016-May-06 22:32 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin