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8981 (1964 YJ)
Classification: Main-belt Asteroid          SPK-ID: 2008981
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 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03586290273745724 1.6125e-08  
a 3.005726621118568 1.343e-08 au
q 2.897932539650007 4.8279e-08 au
i 11.41129035319616 3.3688e-07 deg
node 116.5554215885147 1.5322e-06 deg
peri 72.04609241352667 3.1555e-05 deg
M 175.5396840331017 3.5048e-05 deg
tp 2458272.398541614374
(2018-Jun-02.89854161)
0.00018237 TDB
period 1903.367474193588
5.21
1.2757e-05
3.493e-08
d
yr
n .1891384637391282 1.2677e-09 deg/d
Q 3.11352070258713 1.3912e-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-Apr-12 21:02:11  

Additional Information
 Earth MOID = 1.92575 au 
 Jupiter MOID = 1.94226 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

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Alternate Designations
 1964 YJ = 1972 LP = 1995 WA4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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