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85144 (1981 EU30)
Classification: Main-belt Asteroid          SPK-ID: 2085144
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 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1328046904045277 5.3619e-08  
a 2.346537337397201 9.4913e-09 au
q 2.034906172781501 1.2641e-07 au
i 6.519323482399614 5.6386e-06 deg
node 340.7597722426755 3.5137e-05 deg
peri 3.701515848621926 3.8306e-05 deg
M 166.0674276301761 1.556e-05 deg
tp 2458394.850186133071
(2018-Oct-03.35018613)
5.6168e-05 TDB
period 1312.924130297514
3.59
7.9658e-06
2.181e-08
d
yr
n .2741971083419897 1.6636e-09 deg/d
Q 2.658168502012901 1.0752e-08 au
  Orbit Determination Parameters
   # obs. used (total)      945  
   data-arc span      14283 days (39.10 yr)  
   first obs. used      1981-02-12  
   last obs. used      2020-03-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53821  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 21:01:57  

Additional Information
 Earth MOID = 1.02725 au 
 Jupiter MOID = 2.72718 au 
 T_jup = 3.540 
[ show covariance matrix ]

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 15.3   n/a MPO400787  

85144 (1981 EU30)          Discovered 1981-Mar-02 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
2085-Apr-04 14:31 < 00:01 Juno 0.0473244112578471 0.0473133774018921 0.0473354460270981 7.31970373391412 7.31970369879309 2482685.104663764 0.515953671439813 640.954909512991 48.777149456418 30.9848950901328 75294.4341070617 T 16 CATAB v2.0f-lin.ifort 2020-Nov-12 21:01:58 2020-Nov-12 21:01
2110-Mar-05 06:19 00:01 Hebe 0.0449629054504405 0.0449461884986311 0.0449796224754422 6.77037052793846 6.77037050751681 2491784.762907580 1.03175641374411 838.34763690897 45.6428678795804 -6.21614926218542 17833.7746937551 T 16 CATAB v2.0f-lin.ifort 2020-Nov-12 21:01:58 2020-Nov-12 21:01
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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