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18863 (1999 RC191)
Classification: Main-belt Asteroid          SPK-ID: 2018863
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 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1760869394653029 1.9479e-08  
a 2.667486812374065 1.306e-08 au
q 2.197777223519059 5.5322e-08 au
i 12.55285074405105 1.3429e-06 deg
node 330.8130717331654 3.8531e-06 deg
peri 359.9666163505412 7.2085e-06 deg
M 305.7987648318617 8.0757e-06 deg
tp 2459440.084397076865
(2021-Aug-13.58439708)
3.6287e-05 TDB
period 1591.299214494157
4.36
1.1686e-05
3.199e-08
d
yr
n .2262302379847758 1.6614e-09 deg/d
Q 3.13719640122907 1.536e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2206  
   data-arc span      13840 days (37.89 yr)  
   first obs. used      1982-09-15  
   last obs. used      2020-08-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41966  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:40:10  

Additional Information
 Earth MOID = 1.18513 au 
 Jupiter MOID = 2.22878 au 
 T_jup = 3.327 
[ 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 12.75   n/a E2021B10  
diameter diameter 7.629 km 0.133 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.304   0.024 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18863 (1999 RC191)          Discovered 1999-Sep-11 by LINEAR at Socorro
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 RC191 = 1982 RX = 1982 UB12 = 1998 FQ102 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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