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160557 (1998 RT18)
Classification: Main-belt Asteroid          SPK-ID: 2160557
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1618065107115493 6.5262e-08  
a 2.746309358688942 2.219e-08 au
q 2.301938624025011 1.89e-07 au
i 12.73458865215069 6.867e-06 deg
node 346.2630401188331 2.4356e-05 deg
peri 352.0530419455732 2.9658e-05 deg
M 322.4774247596636 2.0619e-05 deg
tp 2459373.765760260177
(2021-Jun-08.26576026)		 9.6439e-05 TDB
period 1662.350552810951
4.55		 2.0148e-05
5.516e-08		 d
yr
n .2165608206952849 2.6247e-09 deg/d
Q 3.190680093352873 2.5781e-08 au
   Orbit Determination Parameters
   # obs. used (total)      449  
   data-arc span      7979 days (21.85 yr)  
   first obs. used      1998-08-17  
   last obs. used      2020-06-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .58176  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 20:01:51  

Additional Information
 Earth MOID = 1.2922 au 
 Jupiter MOID = 2.21226 au 
 T_jup = 3.293 
[ 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 15.07   n/a E2021B55  

160557 (1998 RT18)          Discovered 1998-Sep-14 by LINEAR at Socorro
Reference: 20070828/Numbers.arcLast Updated: 2007-08-30

Alternate Designations
 1998 RT18 = 1999 XO264 = 2003 UG25 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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