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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07144248134139874 7.1481e-08  
a 1.861815948802738 5.3246e-09 au
q 1.72880319761928 1.3089e-07 au
i 20.34848915802437 5.1745e-06 deg
node 320.128091219745 1.464e-05 deg
peri 60.02767900025903 3.7153e-05 deg
M 79.41629812250292 3.1619e-05 deg
tp 2458395.803373809625
8.171e-05 TDB
period 927.9050669783661
n .3879707233114972 1.6643e-09 deg/d
Q 1.994828699986197 5.705e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1358  
   data-arc span      16486 days (45.14 yr)  
   first obs. used      1974-03-23  
   last obs. used      2019-05-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40622  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 01:12:11  

Additional Information
 Earth MOID = .762162 au 
 Jupiter MOID = 3.25178 au 
 T_jup = 3.914 
[ 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 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-January); 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 2019-Dec-07 09:24 UT
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