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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 3 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07883544437588177 6.4255e-08  
a 2.806787541524775 2.5443e-08 AU
q 2.585513198419981 1.7566e-07 AU
i 6.182797530763823 6.8634e-06 deg
node 295.8302750685795 6.8772e-05 deg
peri 122.7805869451309 8.687e-05 deg
M 230.0364275572861 5.2195e-05 deg
tp 2457420.557374557040
(2016-Feb-02.05737456)
0.00025144 JED
period 1717.563242107145
4.70
2.3354e-05
6.394e-08
d
yr
n .2095992689959666 2.85e-09 deg/d
Q 3.028061884629569 2.7449e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      974  
   data-arc span      21843 days (59.80 yr)  
   first obs. used      1953-08-15  
   last obs. used      2013-06-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .56037  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Aug-05 15:55:18  

Additional Information
 Earth MOID = 1.60353 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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