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JPL Small-Body Database Browser
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85146 (1981 EF33)
Classification: Main-belt Asteroid          SPK-ID: 2085146
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1759358559134339 6.2578e-08  
a 2.424879095213412 1.283e-08 au
q 1.998255916110447 1.5116e-07 au
i 6.786617639946258 8.1765e-06 deg
node 209.7489194729051 4.3514e-05 deg
peri 22.72866760141583 4.8132e-05 deg
M 96.75533790676756 1.8117e-05 deg
tp 2458629.814161863846
(2019-May-26.31416186)
6.9269e-05 TDB
period 1379.22004734874
3.78
1.0946e-05
2.997e-08
d
yr
n .2610170876590898 2.0716e-09 deg/d
Q 2.851502274316376 1.5088e-08 au
  Orbit Determination Parameters
   # obs. used (total)      284  
   data-arc span      13977 days (38.27 yr)  
   first obs. used      1981-02-02  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .61719  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 05:55:11  

Additional Information
 Earth MOID = .989783 au 
 Jupiter MOID = 2.14176 au 
 T_jup = 3.480 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457117.5 (2015-Apr-05.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1752526981943576 6.2711e-08  
q 2.00047784222179 1.5136e-07 au
tp 2457249.728483630390
(2015-Aug-15.22848363)
7.0258e-05 TDB
node 209.7882285515471 4.3499e-05 deg
peri 22.68331131340448 4.8141e-05 deg
i 6.78654490897268 8.1771e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      284  
   data-arc span      13977 days (38.27 yr)  
   first obs. used      1981-02-02  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .61719  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 05:55:11  

Additional Information
 Jupiter MOID = 2.14176 au 
 T_jup = 3.480 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.932633527234846E-15 -9.469218395173066E-15 -1.926631259376679E-12 -8.603368041750263E-15 -4.949465476188997E-13 -6.401638736725176E-16
q -9.469218395173066E-15 2.291096150862815E-14 4.574644657161097E-12 2.118872014118672E-14 1.169218754022801E-12 1.709530355118019E-15
tp -1.926631259376679E-12 4.574644657161097E-12 4.936209825081528E-9 4.745785150792066E-12 1.462332653159606E-9 5.26353544701643E-13
node -8.603368041750263E-15 2.118872014118672E-14 4.745785150792066E-12 1.892178025044961E-9 -1.876764301995131E-9 -8.852445942315359E-11
peri -4.949465476188997E-13 1.169218754022801E-12 1.462332653159606E-9 -1.876764301995131E-9 2.31759231568252E-9 8.815288895024602E-11
i -6.401638736725176E-16 1.709530355118019E-15 5.26353544701643E-13 -8.852445942315359E-11 8.815288895024602E-11 6.686533503039257E-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 16.7   n/a MPO474738  

85146 (1981 EF33)          Discovered 1981-Mar-01 by Bus, S. J. at Siding Spring
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

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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
1927-Nov-30 01:00 < 00:01 Juno 0.0461220795740137 0.0461065789839171 0.0461375892924609 8.9058601397861 8.90586011016772 2425214.541915702 0.916604484497492 1287.03954984154 83.4511877161312 -53.2453354154397 66307.0615132509 T 12 CATAB v2.0e-lin.ifort 2019-May-30 05:55:14 2019-May-30 05:55
1984-Aug-20 10:48 < 00:01 Juno 0.0218901942375801 0.0218879800711944 0.0218924090739805 8.77592410769237 8.77592404436324 2445932.949908880 0.305333736640993 312.240574499622 83.5470543487678 -76.1187154847288 38125.4658558692 T 12 CATAB v2.0e-lin.ifort 2019-May-30 05:55:14 2019-May-30 05:55
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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