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
JPL Small-Body Database Browser
Search: [ help ]  
22921 Siyuanliu (1999 TG95)
Classification: Main-belt Asteroid          SPK-ID: 2022921
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1330923070410534 2.5554e-08  
a 2.276669859451988 7.5426e-09 au
q 1.973662615486692 5.9522e-08 au
i 7.647436153368909 3.4313e-06 deg
node 114.6166948933268 2.2908e-05 deg
peri 223.7700655956167 2.6562e-05 deg
M 87.71213868292986 1.3295e-05 deg
tp 2458894.792767391081
(2020-Feb-15.29276739)
4.6115e-05 TDB
period 1254.724892036284
3.44
6.2354e-06
1.707e-08
d
yr
n .2869154842507019 1.4258e-09 deg/d
Q 2.579677103417284 8.5465e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1416  
   data-arc span      9894 days (27.09 yr)  
   first obs. used      1994-01-10  
   last obs. used      2021-02-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52081  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 04:14:47  

Additional Information
 Earth MOID = .96959 au 
 Jupiter MOID = 2.76769 au 
 T_jup = 3.585 
[ 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 15.3   n/a MPO337452  

22921 Siyuanliu           Discovered 1999 Oct. 2 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Siyuan Liu (b. 1989) is a finalist in the 2007 Intel Science Talent Search (STS), a science competition for high school seniors, for his biochemistry project. He attends the Troy High School, Troy, Michigan.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20070303/MPCPages.arcLast Updated: 2010-04-12

[ show close-approach data ]
Alternate Designations
 1999 TG95 = 1994 AQ11 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Apr-22 15:25 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin