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16541 (1991 PW18)
Classification: Main-belt Asteroid          SPK-ID: 2016541
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06404454189214452 7.3183e-08  
a 2.898590395341574 2.8384e-08 AU
q 2.712951501338953 2.0708e-07 AU
i 1.73432062635161 9.4531e-06 deg
node 202.8641437663359 0.00019246 deg
peri 206.2673964979857 0.00020483 deg
M 150.5569720877579 6.807e-05 deg
tp 2456046.663657094209
(2012-Apr-29.16365709)
0.0003404 JED
period 1802.514222243389
4.94
2.6476e-05
7.249e-08
d
yr
n .1997210316332195 2.9336e-09 deg/d
Q 3.084229289344195 3.0201e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      974  
   data-arc span      11948 days (32.71 yr)  
   first obs. used      1981-09-29  
   last obs. used      2014-06-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .50747  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jul-14 12:36:44  

Additional Information
 Earth MOID = 1.72179 AU 
 T_jup = 3.284 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.8 mag n/a MPO263495  
rotation period rot_per 9. h n/a Asteroid Lightcurve DataBase (Rev. 2013-Sep-12) lower-limit; Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Chiorny, V.G.; Shevchenko, V.G.; Krugly, Yu.N.; Velichko, F.P.; Gaftonyuk, N.M. (2007) Planet. Space Sci. 55, 986-997.]

16541 (1991 PW18)          Discovered 1991-Aug-08 by Holt, H. E. at Palomar (675)
Reference: 20000913/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1991 PW18 = 2000 KA33 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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