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23854 Rickschaffer (1998 RD40)
Classification: Main-belt Asteroid          SPK-ID: 2023854
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 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1656171695034652 5.9321e-08  
a 2.380814313245825 1.6833e-08 AU
q 1.986510585572715 1.4323e-07 AU
i 4.444530653626525 5.6439e-06 deg
node 96.18069360127144 8.1476e-05 deg
peri 169.338669810539 8.4149e-05 deg
M 217.8833763533161 2.4448e-05 deg
tp 2457530.198928540257
(2016-May-21.69892854)
9.2808e-05 JED
period 1341.796683465904
3.67
1.423e-05
3.896e-08
d
yr
n .2682969815293539 2.8454e-09 deg/d
Q 2.775118040918934 1.9621e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      900  
   data-arc span      7564 days (20.71 yr)  
   first obs. used      1994-07-08  
   last obs. used      2015-03-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51415  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-04 16:46:09  

Additional Information
 Earth MOID = .972338 AU 
 T_jup = 3.516 
[ 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 MPO337460  

23854 Rickschaffer           Discovered 1998 Sept. 14 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Rick Schinco Schaffer (b. 1992) is a finalist in the 2007 Discovery Channel Young Scientist Challenge (DCYSC), a middle school science competition, for his botany and zoology project. He attends the James Weldon Johnson Middle School, Jacksonville, Florida.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20071026/MPCPages.arcLast Updated: 2007-10-28

[ show close-approach data ]
Alternate Designations
 1998 RD40 = 1994 NV11 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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