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85439 (1997 EP40)
Classification: Main-belt Asteroid          SPK-ID: 2085439
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08070599736043059 6.42e-08  
a 2.30388678491936 1.324e-08 au
q 2.117949304136927 1.4665e-07 au
i 5.164208000319376 5.041e-06 deg
node 50.26912731122117 7.3904e-05 deg
peri 104.5690459438296 8.1498e-05 deg
M 247.3127826586469 3.8235e-05 deg
tp 2459400.317943765892
(2021-Jul-04.81794377)
0.00013785 TDB
period 1277.291809591087
3.50
1.101e-05
3.014e-08
d
yr
n .2818463230538139 2.4295e-09 deg/d
Q 2.489824265701793 1.4308e-08 au
  Orbit Determination Parameters
   # obs. used (total)      364  
   data-arc span      8629 days (23.62 yr)  
   first obs. used      1997-03-13  
   last obs. used      2020-10-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52403  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 21:00:58  

Additional Information
 Earth MOID = 1.13423 au 
 Jupiter MOID = 2.49526 au 
 T_jup = 3.580 
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Orbital Elements at Epoch 2457321.5 (2015-Oct-26.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07991504261149385 6.4287e-08  
q 2.120169098289635 1.467e-07 au
tp 2456844.830910819340
(2014-Jul-06.33091082)
0.00012604 TDB
node 50.28925321834542 7.3865e-05 deg
peri 104.5007233099067 8.1605e-05 deg
i 5.165673579824363 5.0432e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      364  
   data-arc span      8629 days (23.62 yr)  
   first obs. used      1997-03-13  
   last obs. used      2020-10-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52403  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 21:00:58  

Additional Information
 Jupiter MOID = 2.49526 au 
 T_jup = 3.580 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.132762634445863E-15 -9.39896402192673E-15 2.14140481953572E-12 -5.809006545847482E-14 6.546392538556465E-13 3.730315294167321E-15
q -9.39896402192673E-15 2.152186408121159E-14 -4.108664105471931E-12 1.332983859191616E-13 -1.274764686202966E-12 -8.451278046211465E-15
tp 2.14140481953572E-12 -4.108664105471931E-12 1.588715364824431E-8 -1.998505283995246E-11 4.427562493886485E-9 -1.15438671217539E-12
node -5.809006545847482E-14 1.332983859191616E-13 -1.998505283995246E-11 5.456108923882076E-9 -5.438775543281404E-9 -1.280866480161656E-10
peri 6.546392538556465E-13 -1.274764686202966E-12 4.427562493886485E-9 -5.438775543281404E-9 6.659446844080314E-9 1.27273261565991E-10
i 3.730315294167321E-15 -8.451278046211465E-15 -1.15438671217539E-12 -1.280866480161656E-10 1.27273261565991E-10 2.543365434979468E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.4   n/a MPO436373  

85439 (1997 EP40)          Discovered 1997-Mar-13 by Tesi, L., Cattani, G. at San Marcello
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

Alternate Designations
 1997 EP40 = 1999 XP170 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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