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 ]  
8981 (1964 YJ)
Classification: Main-belt Asteroid          SPK-ID: 2008981
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ hide orbit diagram ]

For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03596208108820524 1.6081e-08  
a 3.005534299843995 1.3321e-08 au
q 2.897449031639623 4.815e-08 au
i 11.41125843965682 3.3688e-07 deg
node 116.554694032213 1.5322e-06 deg
peri 71.83808297557917 3.1529e-05 deg
M 212.8389392383071 3.5142e-05 deg
tp 2460174.485259785107
(2023-Aug-17.98525979)
0.00018837 TDB
period 1903.18479680016
5.21
1.2653e-05
3.464e-08
d
yr
n .1891566182145165 1.2576e-09 deg/d
Q 3.113619568048367 1.38e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2590  
   data-arc span      20495 days (56.11 yr)  
   first obs. used      1964-12-31  
   last obs. used      2021-02-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43355  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 15:55:43  

Additional Information
 Earth MOID = 1.92654 au 
 Jupiter MOID = 1.94143 au 
 T_jup = 3.220 
[ 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 12.15   n/a E2021B10  

8981 (1964 YJ)          Discovered 1964-Dec-31 by Purple Mountain Observatory at Nanking
Reference: 19980808/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1964 YJ = 1972 LP = 1995 WA4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Jul-27 23:08 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin