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
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.


JPL Small-Body Database Browser
Search: [ help ]  
65645 (1981 EG13)
Classification: Main-belt Asteroid          SPK-ID: 2065645
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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05146299577673751 4.3069e-08  
a 2.302921894895044 1.0125e-08 au
q 2.184406635143904 9.937e-08 au
i 6.359410462451986 4.347e-06 deg
node 311.5569491229225 3.4669e-05 deg
peri 210.6316838955893 5.0423e-05 deg
M 96.81129386017425 3.5906e-05 deg
tp 2458657.226116120303
(2019-Jun-22.72611612)
0.00012752 TDB
period 1276.489480402741
3.49
8.4185e-06
2.305e-08
d
yr
n .2820234757331627 1.86e-09 deg/d
Q 2.421437154646184 1.0646e-08 au
  Orbit Determination Parameters
   # obs. used (total)      975  
   data-arc span      13961 days (38.22 yr)  
   first obs. used      1981-02-09  
   last obs. used      2019-05-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53069  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 04:50:07  

Additional Information
 Earth MOID = 1.19576 au 
 Jupiter MOID = 2.56992 au 
 T_jup = 3.580 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456764.5 (2014-Apr-17.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05176770642678802 4.304e-08  
q 2.18311403797697 9.9464e-08 au
tp 2457381.691455503672
(2015-Dec-25.19145550)
0.00012776 TDB
node 311.5993972936696 3.4653e-05 deg
peri 210.7090327710554 5.0231e-05 deg
i 6.361750602109985 4.3479e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      975  
   data-arc span      13961 days (38.22 yr)  
   first obs. used      1981-02-09  
   last obs. used      2019-05-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53069  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 04:50:07  

Additional Information
 Jupiter MOID = 2.56992 au 
 T_jup = 3.580 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.852465277630056E-15 -4.260528741617114E-15 3.25547958984183E-13 -9.650376891355587E-15 1.554738719778459E-13 -6.22295640995517E-16
q -4.260528741617114E-15 9.893035896583808E-15 -9.5761167753816E-13 2.140190715786906E-14 -4.280318421443066E-13 1.564678893596328E-15
tp 3.25547958984183E-13 -9.5761167753816E-13 1.632326179312549E-8 4.934486390625174E-11 4.652490964972171E-9 2.667906373466405E-12
node -9.650376891355587E-15 2.140190715786906E-14 4.934486390625174E-11 1.200802859577308E-9 -1.179223788337109E-9 3.138116697214003E-11
peri 1.554738719778459E-13 -4.280318421443066E-13 4.652490964972171E-9 -1.179223788337109E-9 2.523123713986887E-9 -3.044284106438929E-11
i -6.22295640995517E-16 1.564678893596328E-15 2.667906373466405E-12 3.138116697214003E-11 -3.044284106438929E-11 1.890453767308906E-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 15.5   n/a MPO468580  

65645 (1981 EG13)          Discovered 1981-Mar-01 by Bus, S. J. at Siding Spring
Reference: 20030910/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1981 EG13 = 2000 SG176 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-May-26 07:33 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin