Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Near-Earth Object (NEO) Program
Search JPL
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
16541 (1991 PW18)
Classification: Main-belt Asteroid          SPK-ID: 2016541
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 6 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06404460977543562 7.9288e-08  
a 2.898590377228749 3.269e-08 AU
q 2.712951287620301 2.2459e-07 AU
i 1.734313776076375 1.0339e-05 deg
node 202.8643726819264 0.00021946 deg
peri 206.2671491440244 0.0002344 deg
M 150.5570012507944 7.7415e-05 deg
tp 2456046.663518141258
(2012-Apr-29.16351814)
0.00038801 JED
period 1802.514205347957
4.94
3.0493e-05
8.349e-08
d
yr
n .1997210335052564 3.3786e-09 deg/d
Q 3.084229466837197 3.4783e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      940  
   data-arc span      11853 days (32.45 yr)  
   first obs. used      1981-09-29  
   last obs. used      2014-03-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52719  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Mar-22 11:07:17  

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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2014-Apr-17 15:32 UT
(server date/time)  
NASA Home Page
Site Manager:   Donald K. Yeomans
Webmaster  Alan B. Chamberlin