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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 ]

[ show orbit diagram ]
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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1963-Aug-21 18:52 00:01 Jupiter 1.96401962979981 1.96401941717544 1.96401984242473 3.10391998224212 2.96171901014831 2438263.286155502 1.10747339502297 67.8775475244234 4.6812850949251 81.423883204365 9468661.23473323 T 36 CATAB v2.0g-lin.ifort 2021-Jul-08 15:57:41 2021-Jul-08 15:57
2010-Feb-18 05:03 < 00:01 Jupiter 1.95229747950495 1.95229739380458 1.95229756520532 3.76376007485429 3.64666576553266 2455245.710114173 0.101183438975758 7.455123318429 3.50847513233902 77.4178280744647 21370854.2369763 T 36 CATAB v2.0g-lin.ifort 2021-Jul-08 15:57:41 2021-Jul-08 15:57
2094-Jan-25 23:26 00:02 Jupiter 1.96527622256566 1.96527608462985 1.9652763605018 3.09507991873975 2.95254660388151 2485903.476078086 1.71198138169693 105.656935971064 4.14715188730986 85.551831918515 10360360.5751537 T 36 CATAB v2.0g-lin.ifort 2021-Jul-08 15:57:41 2021-Jul-08 15:57
2140-Jul-27 07:07 00:03 Jupiter 1.96367560131155 1.96367536884756 1.96367583378057 3.78494292510895 3.66921000646765 2502886.796452124 2.55094955736452 171.228469375127 3.50747091466409 -88.685637017823 22143829.3560027 T 36 CATAB v2.0g-lin.ifort 2021-Jul-08 15:57:41 2021-Jul-08 15:57

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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