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7925 Shelus (1986 RX2)
Classification: Main-belt Asteroid          SPK-ID: 2007925
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1833307876408532 3.685e-08  
a 3.145598988721159 1.7014e-08 au
q 2.568913848516638 1.1959e-07 au
i 1.574017675438147 4.3239e-06 deg
node 342.5882352048894 0.00012084 deg
peri 18.51723239179712 0.00012123 deg
M 23.22322494016177 9.5246e-06 deg
tp 2458869.046095670191
5.3841e-05 TDB
period 2037.762011118931
n .176664398509581 1.4333e-09 deg/d
Q 3.72228412892568 2.0133e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1929  
   data-arc span      25464 days (69.72 yr)  
   first obs. used      1950-04-17  
   last obs. used      2020-01-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50697  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-28 21:02:50  

Additional Information
 Earth MOID = 1.56602 au 
 Jupiter MOID = 1.73622 au 
 T_jup = 3.182 
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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 13.4   n/a MPO448992  
diameter diameter 10.799 km 0.204 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
geometric albedo albedo 0.087   0.019 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  

7925 Shelus           Discovered 1986 Sept. 6 by E. Bowell at the Anderson Mesa Station of the Lowell Observatory.
Named in honor of Peter J. Shelus (b. 1942), who has ably managed the Lunar and Satellite Laser Ranging Projects at McDonald Observatory since 1982. An astrometrist by training, Shelus has carried out long-term observations of the faint jovian satellites. Currently, he is providing software management and observing expertise for time-critical follow-up astrometry of newly discovered NEOs. His program leadership has been recognized by NASA in group achievement awards for satellite and lunar laser ranging and for development of ephemerides. His 20 years of service as treasurer of the Division of Dynamical Astronomy of the American Astronomical Society is also recognized. Citation written by E. S. Barker.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19990728/MPCPages.arcLast Updated: 2010-06-11

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Alternate Designations
 1986 RX2 = 1964 TD1 = 1975 TR1 = 1991 NK5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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