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JPL Small-Body Database Browser
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39488 (1981 EM6)
Classification: Main-belt Asteroid          SPK-ID: 2039488
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1291853836763141 3.7501e-08  
a 2.590974625039879 1.5303e-08 au
q 2.256258574008508 9.6855e-08 au
i 13.06351333215066 5.5123e-06 deg
node 214.5729113286154 1.6579e-05 deg
peri 131.0110940152744 2.6895e-05 deg
M 249.1819502114505 2.2154e-05 deg
tp 2459069.422604721119
(2020-Aug-07.92260472)
9.5391e-05 TDB
period 1523.327093571047
4.17
1.3496e-05
3.695e-08
d
yr
n .2363248192192741 2.0938e-09 deg/d
Q 2.92569067607125 1.728e-08 au
  Orbit Determination Parameters
   # obs. used (total)      826  
   data-arc span      13970 days (38.25 yr)  
   first obs. used      1981-02-09  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52652  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 04:09:22  

Additional Information
 Earth MOID = 1.27316 au 
 Jupiter MOID = 2.57462 au 
 T_jup = 3.372 
[ 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 14.8   n/a MPO474252  

39488 (1981 EM6)          Discovered 1981-Mar-06 by Bus, S. J. at Siding Spring
Reference: 20020526/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1981 EM6 = 1998 HO67 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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