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16687 (1994 PN20)
Classification: Main-belt Asteroid          SPK-ID: 2016687
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1909322266705435 4.1517e-08  
a 2.39541928418107 7.2373e-09 au
q 1.938056546442819 9.8875e-08 au
i .4145295669789479 3.0627e-06 deg
node 251.6676373333776 0.00062836 deg
peri 81.93146626513041 0.00062842 deg
M 89.96917976782261 8.4823e-06 deg
tp 2459058.075341408724
(2020-Jul-27.57534141)
3.2101e-05 TDB
period 1354.162363236667
3.71
6.137e-06
1.68e-08
d
yr
n .2658469986859934 1.2048e-09 deg/d
Q 2.852782021919321 8.6191e-09 au
  Orbit Determination Parameters
   # obs. used (total)      909  
   data-arc span      15141 days (41.45 yr)  
   first obs. used      1979-07-24  
   last obs. used      2021-01-05  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53123  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 17:41:34  

Additional Information
 Earth MOID = .927171 au 
 Jupiter MOID = 2.51289 au 
 T_jup = 3.504 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.13   n/a E2021B10  

16687 (1994 PN20)          Discovered 1994-Aug-12 by Elst, E. W. at La Silla
Reference: 20000913/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1994 PN20 = 1979 OP5 = 2000 AC254 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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