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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1587871026055747 5.0411e-08  
a 3.169545274906074 2.975e-08 AU
q 2.666262364126549 1.6669e-07 AU
i 2.343737330341265 5.6207e-06 deg
node 120.0344522678308 0.00014738 deg
peri 331.0867583694987 0.00014933 deg
M 44.26963515410885 1.9771e-05 deg
tp 2456747.047074460687
(2014-Mar-30.54707446)
0.00011369 JED
period 2061.075337000693
5.64
2.9018e-05
7.945e-08
d
yr
n .1746661044054204 2.4591e-09 deg/d
Q 3.672828185685599 3.4473e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1148  
   data-arc span      14622 days (40.03 yr)  
   first obs. used      1975-01-17  
   last obs. used      2015-01-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .50764  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Feb-04 13:25:49  

Additional Information
 Earth MOID = 1.68291 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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