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52256 (1981 EM38)
Classification: Main-belt Asteroid          SPK-ID: 2052256
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1201874587506414 4.2231e-08  
a 2.768874713865958 1.5516e-08 au
q 2.436090698407499 1.2211e-07 au
i 4.205837870532597 4.1834e-06 deg
node 303.7711059728209 6.6745e-05 deg
peri 166.6467076332689 7.0574e-05 deg
M 281.471382756532 2.4065e-05 deg
tp 2459567.595308523242
(2021-Dec-19.09530852)
0.00011381 TDB
period 1682.880912809648
4.61
1.4145e-05
3.873e-08
d
yr
n .21391887997527 1.7981e-09 deg/d
Q 3.101658729324417 1.738e-08 au
  Orbit Determination Parameters
   # obs. used (total)      634  
   data-arc span      15020 days (41.12 yr)  
   first obs. used      1979-11-22  
   last obs. used      2021-01-05  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .58178  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 10:43:50  

Additional Information
 Earth MOID = 1.45285 au 
 Jupiter MOID = 2.001 au 
 T_jup = 3.324 
[ 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 15.51   n/a MPCxxxxx  

52256 (1981 EM38)          Discovered 1981-Mar-01 by Bus, S. J. at Siding Spring
Reference: 20030216/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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