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18860 (1999 RL133)
Classification: Outer Main-belt Asteroid          SPK-ID: 2018860
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 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08615280162784163 2.0095e-08  
a 3.234556359179461 1.688e-08 au
q 2.955890266812999 6.6677e-08 au
i 12.67967587394742 4.8567e-07 deg
node 197.9376295253756 2.1462e-06 deg
peri 332.6304909100765 9.007e-06 deg
M 42.62142377753605 8.8288e-06 deg
tp 2458948.937464398932
(2020-Apr-09.43746440)
5.1204e-05 TDB
period 2124.812002740187
5.82
1.6633e-05
4.554e-08
d
yr
n .1694267537719756 1.3263e-09 deg/d
Q 3.513222451545923 1.8334e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2106  
   data-arc span      10966 days (30.02 yr)  
   first obs. used      1991-03-11  
   last obs. used      2021-03-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49148  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 02:48:26  

Additional Information
 Earth MOID = 1.96564 au 
 Jupiter MOID = 1.47533 au 
 T_jup = 3.141 
[ 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 12.85   n/a E2021B10  
rotation period rot_per 62.6799 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]

18860 (1999 RL133)          Discovered 1999-Sep-09 by LINEAR at Socorro
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 RL133 = 1991 EC9 = 1998 MO11 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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