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JPL Small-Body Database Browser
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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1124204038504852 4.0542e-08  
a 2.314984253103543 9.452e-09 au
q 2.054732788462129 9.4931e-08 au
i 5.951475591641071 4.9609e-06 deg
node 178.718196925609 3.9058e-05 deg
peri 63.21806912475813 4.468e-05 deg
M 350.4254345903149 2.0615e-05 deg
tp 2459034.716616193965
(2020-Jul-04.21661619)
7.3668e-05 TDB
period 1286.531691283581
3.52
7.8793e-06
2.157e-08
d
yr
n .2798221003330478 1.7137e-09 deg/d
Q 2.575235717744958 1.0515e-08 au
  Orbit Determination Parameters
   # obs. used (total)      482  
   data-arc span      14296 days (39.14 yr)  
   first obs. used      1981-03-07  
   last obs. used      2020-04-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55663  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 12:53:10  

Additional Information
 Earth MOID = 1.0507 au 
 Jupiter MOID = 2.43328 au 
 T_jup = 3.566 
[ 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 16.4   n/a MPO422120  

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 17 CATAB v2.0f-lin.ifort 2020-May-20 12:53:24 2020-May-20 12:53
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 17 CATAB v2.0f-lin.ifort 2020-May-20 12:53:24 2020-May-20 12:53

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