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9278 (1981 EM1)
Classification: Main-belt Asteroid          SPK-ID: 2009278
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1585085373726964 5.6592e-08  
a 3.169688086025928 2.7857e-08 AU
q 2.667265463582297 1.8768e-07 AU
i 2.343298372557531 5.9287e-06 deg
node 120.0338121065006 0.00015936 deg
peri 331.3180920551837 0.00016149 deg
M 9.177893138892431 2.1271e-05 deg
tp 2456747.951089760032
(2014-Mar-31.45108976)
0.00012186 JED
period 2061.214638272807
5.64
2.7172e-05
7.439e-08
d
yr
n .1746543000983448 2.3024e-09 deg/d
Q 3.672110708469559 3.2272e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1109  
   data-arc span      14326 days (39.22 yr)  
   first obs. used      1975-01-17  
   last obs. used      2014-04-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53136  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Apr-17 13:56:19  

Additional Information
 Earth MOID = 1.68358 AU 
 T_jup = 3.182 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.9 mag n/a MPO279613  

9278 (1981 EM1)          Discovered 1981-Mar-07 by Debehogne, H., DeSanctis, G. at La Silla (809)
Reference: 19981005/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1981 EM1 = 1975 BK = 1982 JQ1 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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