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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1270572349993569 6.9462e-08  
a 2.64978422696114 3.1443e-08 AU
q 2.313109969738549 1.8575e-07 AU
i 11.61164559323034 8.8419e-06 deg
node 305.0074916510399 4.0973e-05 deg
peri 284.0998772173789 6.3892e-05 deg
M 194.7223153223721 5.451e-05 deg
tp 2457523.812403157674
(2016-May-15.31240316)
0.00024302 JED
period 1575.484710138909
4.31
2.8043e-05
7.678e-08
d
yr
n .2285011067916103 4.0672e-09 deg/d
Q 2.98645848418373 3.5438e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      911  
   data-arc span      8223 days (22.51 yr)  
   first obs. used      1991-08-07  
   last obs. used      2014-02-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51326  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Feb-19 18:08:23  

Additional Information
 Earth MOID = 1.33522 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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