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 ]  
65653 (1981 EP44)
Classification: Main-belt Asteroid          SPK-ID: 2065653
[ 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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1124204012389392 4.0401e-08  
a 2.314984251753175 8.8826e-09 au
q 2.054732793309258 9.4577e-08 au
i 5.951478187538507 4.2751e-06 deg
node 178.7181892104142 3.6313e-05 deg
peri 63.21807363305877 4.1638e-05 deg
M 350.4254384547974 1.8229e-05 deg
tp 2459034.716602353529
(2020-Jul-04.21660235)		 6.5101e-05 TDB
period 1286.531690157899
3.52		 7.4046e-06
2.027e-08		 d
yr
n .2798221005778851 1.6105e-09 deg/d
Q 2.575235710197092 9.8812e-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 = 1.0507 au 
 Jupiter MOID = 2.43328 au 
 T_jup = 3.566 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457552.5 (2016-Jun-13.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1126921470988439 4.0355e-08  
q 2.054749206518516 9.4542e-08 au
tp 2457746.686890655267
(2016-Dec-24.18689066)		 6.6939e-05 TDB
node 178.7326538103766 3.6307e-05 deg
peri 62.84204887470011 4.1609e-05 deg
i 5.95134185307381 4.2753e-06 deg
   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
 Jupiter MOID = 2.43328 au 
 T_jup = 3.566 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.62854076728335E-15 -3.802110156048154E-15 -1.196806285089748E-13 2.365951089580577E-14 -5.197241721390788E-15 -3.795430909087153E-15
q -3.802110156048154E-15 8.938184719910451E-15 1.126755784357882E-13 -5.61616787721729E-14 -3.850553328154787E-14 8.923172148881887E-15
tp -1.196806285089748E-13 1.126755784357882E-13 4.480888157033913E-9 -1.2824279959288E-12 1.371394907513398E-9 4.010010125169538E-12
node 2.365951089580577E-14 -5.61616787721729E-14 -1.2824279959288E-12 1.318180004803568E-9 -1.310290233429944E-9 3.26116206801883E-11
peri -5.197241721390788E-15 -3.850553328154787E-14 1.371394907513398E-9 -1.310290233429944E-9 1.731281315931062E-9 -3.136977443971874E-11
i -3.795430909087153E-15 8.923172148881887E-15 4.010010125169538E-12 3.26116206801883E-11 -3.136977443971874E-11 1.82782287143124E-11

[ 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

[ show close-approach data ]
Alternate Designations
 1981 EP44 = 1999 LM9 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Jan-15 22:18 UT
(server date/time)   		NASA Home Page
Site Manager:   Ryan S. Park
Webmaster:   Alan B. Chamberlin