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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 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1267225474135373 6.7819e-08  
a 2.650843477144023 3.0335e-08 AU
q 2.314921838925774 1.8145e-07 AU
i 11.61146053040756 8.8825e-06 deg
node 305.0080285745312 3.9878e-05 deg
peri 283.9691608364877 6.2924e-05 deg
M 240.5462265907424 5.471e-05 deg
tp 2457523.584590890493
(2016-May-15.08459089)
0.00024321 JED
period 1576.429503615693
4.32
2.706e-05
7.409e-08
d
yr
n .2283641603854186 3.92e-09 deg/d
Q 2.986765115362273 3.418e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      918  
   data-arc span      8480 days (23.22 yr)  
   first obs. used      1991-08-07  
   last obs. used      2014-10-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .48263  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Nov-10 13:06:29  

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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