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118945 Rikhill (2000 WS68)
Classification: Main-belt Asteroid          SPK-ID: 2118945
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04856424396045229 1.1945e-07  
a 3.184362846497701 5.1437e-08 AU
q 3.029716672361787 3.7809e-07 AU
i 7.831585588802403 8.8652e-06 deg
node 58.17649603501812 6.8463e-05 deg
peri 125.9701283794237 0.00012216 deg
M 50.93740761675267 9.3898e-05 deg
tp 2456706.825264176471
(2014-Feb-18.32526418)
0.00054421 JED
period 2075.54545555042
5.68
5.029e-05
1.377e-07
d
yr
n .1734483815024569 4.2026e-09 deg/d
Q 3.339009020633616 5.3935e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      312  
   data-arc span      4938 days (13.52 yr)  
   first obs. used      2000-11-18  
   last obs. used      2014-05-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .63765  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Oct-09 17:33:27  

Additional Information
 Earth MOID = 2.03923 AU 
 T_jup = 3.182 
[ 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 14.9 mag n/a MPO302623  

118945 Rikhill           Discovered 2000 Nov. 29 by D. Healy at Junk Bond Observatory.
"Amateur turned Pro" best describes Rik Hill (b. 1949). Well known among amateur astronomers for his outreach activities, Rik currently works with the Catalina Sky Survey on Arizona's Mt. Lemmon searching for potentially hazardous asteroids. He has seven comet discoveries to his credit.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20070106/MPCPages.arcLast Updated: 2007-01-09

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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