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5871 Bobbell (1989 CE2)
Classification: Inner Main-belt Asteroid          SPK-ID: 2005871
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07142265944299853 7.1146e-08  
a 1.861821907680835 5.2258e-09 au
q 1.728845635625033 1.304e-07 au
i 20.34958077958601 5.1665e-06 deg
node 320.1257971345297 1.462e-05 deg
peri 59.85600607263549 3.687e-05 deg
M 234.8020636171678 3.1244e-05 deg
tp 2459323.200992416170
8.0272e-05 TDB
period 927.9095217239656
n .3879688607259413 1.6334e-09 deg/d
Q 1.994798179736637 5.599e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1371  
   data-arc span      16748 days (45.85 yr)  
   first obs. used      1974-03-23  
   last obs. used      2020-01-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41108  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 17:49:05  

Additional Information
 Earth MOID = .762847 au 
 Jupiter MOID = 3.25053 au 
 T_jup = 3.914 
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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.1   n/a MPO458890  
diameter diameter 2.384 km 0.441 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 30.21 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Warner, B.D. (2009) Minor Planet Bull. 36, 70-73.]
[Warner, B.D. (2014) Minor Planet Bull. 41, 144-155.]
geometric albedo albedo 0.856   0.243 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  

5871 Bobbell           Discovered 1989 Feb. 11 by E. F. Helin at Palomar.
Named in honor of Robert L. Bell, friend and associate of the discoverer's husband. Bob Bell graduated from the California Institute of Technology with a B.S. in physics and an M.S. in applied mechanics, which he promptly utilized to invent pressure-sensing devices to monitor automobile-engine functions, enabling us to drive efficiently down our highways. More recently he has joined the astronomical community with his own private dome and CCD-equipped telescope. Bob is the quintessential entrepreneur, applying and promoting new ideas to solve problems.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19961026/MPCPages.arcLast Updated: 2003-09-26
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
FirstGov 2020-Aug-11 05:05 UT
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