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8170 (1991 PZ11)
Classification: Main-belt Asteroid          SPK-ID: 2008170
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 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1267225363413711 6.6331e-08  
a 2.650843471637014 2.9424e-08 AU
q 2.314921863467206 1.7878e-07 AU
i 11.61145899697668 8.7257e-06 deg
node 305.0080197604408 3.8568e-05 deg
peri 283.9691739736646 6.1772e-05 deg
M 240.5462246011007 5.4683e-05 deg
tp 2457523.584597973048
(2016-May-15.08459797)
0.00024314 JED
period 1576.42949870325
4.32
2.6247e-05
7.186e-08
d
yr
n .2283641610970432 3.8022e-09 deg/d
Q 2.986765079806822 3.3152e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      931  
   data-arc span      8539 days (23.38 yr)  
   first obs. used      1991-08-07  
   last obs. used      2014-12-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .48281  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jan-08 00:24:35  

Additional Information
 Earth MOID = 1.33848 AU 
 T_jup = 3.350 
[ 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 PDS3 (MPC 31080)  

8170 (1991 PZ11)          Discovered 1991-Aug-07 by Holt, H. E. at Palomar (675)
Reference: DISCOVERY.DBLast Updated: 2003-08-29
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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