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9855 (1991 CU)
Classification: Main-belt Asteroid          SPK-ID: 2009855
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 7 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09307333114677564 6.2303e-08  
a 2.582148830668431 2.163e-08 AU
q 2.341819637481369 1.6569e-07 AU
i 9.97199318872833 6.2348e-06 deg
node 140.5335650619691 3.7864e-05 deg
peri 214.5416885349242 5.2698e-05 deg
M 36.6985913782287 3.8423e-05 deg
tp 2456846.004004574184
(2014-Jul-07.50400457)
0.00016152 JED
period 1515.550223169853
4.15
1.9043e-05
5.214e-08
d
yr
n .2375374926520357 2.9847e-09 deg/d
Q 2.822478023855494 2.3643e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      984  
   data-arc span      12006 days (32.87 yr)  
   first obs. used      1981-10-23  
   last obs. used      2014-09-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .50031  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Sep-12 13:55:44  

Additional Information
 Earth MOID = 1.34264 AU 
 T_jup = 3.397 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.7 mag n/a MPO266010  

9855 (1991 CU)          Discovered 1991-Feb-07 by McNaught, R. H. at Siding Spring (413)
Reference: 19990106/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1991 CU = 1981 UQ15 = 2001 WS102 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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