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8281 (1991 PC18)
Classification: Main-belt Asteroid          SPK-ID: 2008281
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 7 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07874824302192389 5.405e-08  
a 2.806735517743385 2.3857e-08 AU
q 2.585710027093864 1.5008e-07 AU
i 6.182653119883833 6.7504e-06 deg
node 295.82971452085 5.5473e-05 deg
peri 122.8163004640482 7.3174e-05 deg
M 271.9098525261084 4.9103e-05 deg
tp 2457420.767202181033
(2016-Feb-02.26720218)
0.00023679 JED
period 1717.515489799964
4.70
2.1898e-05
5.995e-08
d
yr
n .2096050965117809 2.6724e-09 deg/d
Q 3.027761008392907 2.5736e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1003  
   data-arc span      22266 days (60.96 yr)  
   first obs. used      1953-08-15  
   last obs. used      2014-08-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52547  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Aug-13 14:12:24  

Additional Information
 Earth MOID = 1.6044 AU 
 T_jup = 3.310 
[ 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 13.1 mag n/a MPO263423  

8281 (1991 PC18)          Discovered 1991-Aug-08 by Holt, H. E. at Palomar (675)
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1991 PC18 = 1993 BX 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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