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65653 (1981 EP44)
Classification: Main-belt Asteroid          SPK-ID: 2065653
[ 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 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1127675048932619 4.0382e-08  
a 2.315795710025953 8.9144e-09 au
q 2.054649205963806 9.4614e-08 au
i 5.951732078028185 4.275e-06 deg
node 178.6992062303636 3.6305e-05 deg
peri 63.25792056489438 4.1601e-05 deg
M 46.34401999645299 1.8098e-05 deg
tp 2459034.793327457742
(2020-Jul-04.29332746)		 6.4921e-05 TDB
period 1287.208190393896
3.52		 7.4325e-06
2.035e-08		 d
yr
n .2796750383400194 1.6149e-09 deg/d
Q 2.5769422140881 9.9197e-09 au
   Orbit Determination Parameters
   # obs. used (total)      605  
   data-arc span      14429 days (39.50 yr)  
   first obs. used      1981-03-07  
   last obs. used      2020-09-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53405  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 22:21:18  

Additional Information
 Earth MOID = 1.04921 au 
 Jupiter MOID = 2.4306 au 
 T_jup = 3.565 
[ 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 16.52   n/a E2021B10  

65653 (1981 EP44)          Discovered 1981-Mar-07 by Bus, S. J. at Siding Spring
Reference: 20030910/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
1917-Mar-28 13:27 < 00:01 Hebe 0.0384164781605358 0.0384017765580364 0.0384311797647666 6.48533853540253 6.48533851045042 2421316.060525890 0.677475716000527 733.018635220284 59.4903043790515 0.94095035601041 7995.83010027921 T 19 CATAB v2.0f-lin.ifort 2020-Nov-12 22:21:19 2020-Nov-12 22:21
2008-Jun-21 12:07 < 00:01 David 0.0382790444980473 0.0382781523052198 0.0382799367228655 5.64024481939217 5.64024474942022 2454639.004895307 0.596181112623905 98.2969700159702 34.5640483758028 -72.2961661445123 158747.880707242 T 19 CATAB v2.0f-lin.ifort 2020-Nov-12 22:21:19 2020-Nov-12 22:21

Alternate Designations
 1981 EP44 = 1999 LM9 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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