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85148 (1981 EH39)
Classification: Main-belt Asteroid          SPK-ID: 2085148
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 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1279674687086792 4.0024e-08  
a 2.428215847596426 1.1281e-08 au
q 2.117483212101211 9.6054e-08 au
i 2.930339117598387 5.3809e-06 deg
node 317.6810489864399 9.9337e-05 deg
peri 285.5636834296897 0.00010236 deg
M 75.18962566839983 2.4372e-05 deg
tp 2458711.841212822369
(2019-Aug-16.34121282)
9.3493e-05 TDB
period 1382.067837952021
3.78
9.6316e-06
2.637e-08
d
yr
n .2604792544289694 1.8153e-09 deg/d
Q 2.738948483091641 1.2725e-08 au
  Orbit Determination Parameters
   # obs. used (total)      442  
   data-arc span      14479 days (39.64 yr)  
   first obs. used      1981-03-02  
   last obs. used      2020-10-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .64102  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 21:01:56  

Additional Information
 Earth MOID = 1.10674 au 
 Jupiter MOID = 2.28484 au 
 T_jup = 3.496 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457711.5 (2016-Nov-19.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1272323194838818 4.0051e-08  
q 2.119806199625042 9.5976e-08 au
tp 2457329.759464366457
(2015-Nov-03.25946437)
9.4544e-05 TDB
node 317.7332043391172 9.9401e-05 deg
peri 285.6615600767456 0.00010246 deg
i 2.928839332060433 5.3795e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      442  
   data-arc span      14479 days (39.64 yr)  
   first obs. used      1981-03-02  
   last obs. used      2020-10-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .64102  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 21:01:56  

Additional Information
 Jupiter MOID = 2.28484 au 
 T_jup = 3.496 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.604079852471167E-15 -3.824388650104375E-15 -2.154812220278392E-12 -8.67496093874531E-15 -5.790069110545031E-13 -1.552454130539686E-15
q -3.824388650104375E-15 9.211462924759068E-15 5.148849704898189E-12 2.121673107792398E-14 1.389554066990777E-12 3.821275494290583E-15
tp -2.154812220278392E-12 5.148849704898189E-12 8.938561151668097E-9 2.753547670717818E-11 2.380853160047977E-9 4.033170222386558E-12
node -8.67496093874531E-15 2.121673107792398E-14 2.753547670717818E-11 9.880478972918893E-9 -9.860160152604712E-9 3.059787674191123E-10
peri -5.790069110545031E-13 1.389554066990777E-12 2.380853160047977E-9 -9.860160152604712E-9 1.049880438014864E-8 -3.045032603481137E-10
i -1.552454130539686E-15 3.821275494290583E-15 4.033170222386558E-12 3.059787674191123E-10 -3.045032603481137E-10 2.893938188483417E-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 MPO240809  

85148 (1981 EH39)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

[ 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
2028-Nov-23 15:21 00:01 Thisb 0.0463695914526735 0.0463679311236629 0.0463712518340073 2.71943437448562 2.71943432041481 2462099.139318456 1.26725676529178 187.188561329969 73.3547410845714 -77.2064548966439 92470.3029045964 T 15 CATAB v2.0f-lin.ifort 2020-Nov-12 21:01:57 2020-Nov-12 21:01

Alternate Designations
 1981 EH39 = 2000 FN62 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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