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160514 (1991 PQ9)
Classification: Main-belt Asteroid          SPK-ID: 2160514
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2396868595173019 5.368e-08  
a 3.168137407867227 2.5566e-08 au
q 2.408776502056246 1.7395e-07 au
i 8.347229813782327 5.6409e-06 deg
node 308.1467196576333 2.8626e-05 deg
peri 12.22189124302389 3.0892e-05 deg
M 79.97840242197978 8.9833e-06 deg
tp 2458742.911959638108
(2019-Sep-16.41195964)
5.1158e-05 TDB
period 2059.702238876047
5.64
2.4932e-05
6.826e-08
d
yr
n .1747825453626964 2.1157e-09 deg/d
Q 3.927498313678208 3.1694e-08 au
  Orbit Determination Parameters
   # obs. used (total)      654  
   data-arc span      10783 days (29.52 yr)  
   first obs. used      1991-08-03  
   last obs. used      2021-02-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49074  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 20:01:40  

Additional Information
 Earth MOID = 1.39459 au 
 Jupiter MOID = 1.40657 au 
 T_jup = 3.141 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.6   n/a MPO493914  

160514 (1991 PQ9)          Discovered 1991-Aug-07 by Holt, H. E. at Palomar
Reference: 20070828/Numbers.arcLast Updated: 2007-08-30

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Alternate Designations
 1991 PQ9 = 2003 WO9 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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