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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 | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1909472633815242 4.1504e-08  
a 2.395100546583723 7.2521e-09 au
q 1.937762651689968 9.8855e-08 au
i .4146226389078954 3.063e-06 deg
node 251.6654518142525 0.00062821 deg
peri 81.89028864826561 0.00062828 deg
M 37.89619686898377 8.5122e-06 deg
tp 2459057.979552027291
(2020-Jul-27.47955203)
3.2105e-05 TDB
period 1353.89209232676
3.71
6.1491e-06
1.684e-08
d
yr
n .2659000684325694 1.2077e-09 deg/d
Q 2.852438441477477 8.6369e-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-Apr-13 01:38:47  

Additional Information
 Earth MOID = .925728 au 
 Jupiter MOID = 2.51346 au 
 T_jup = 3.504 
[ 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 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

[ show close-approach data ]
Alternate Designations
 1994 PN20 = 1979 OP5 = 2000 AC254 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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