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4838 Billmclaughlin (1989 NJ)
Classification: Main-belt Asteroid          SPK-ID: 2004838
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1427709447269698 2.9912e-08  
a 2.352998226600477 7.0347e-09 au
q 2.017058446847842 7.078e-08 au
i 8.875922930519366 3.4049e-06 deg
node 217.7951607605722 2.0749e-05 deg
peri 40.70294540541962 2.364e-05 deg
M 279.1288708517022 1.1581e-05 deg
tp 2459496.656884528816
4.2705e-05 TDB
period 1318.35031306247
n .2730685436435599 1.2246e-09 deg/d
Q 2.688938006353111 8.039e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2751  
   data-arc span      19685 days (53.89 yr)  
   first obs. used      1967-05-02  
   last obs. used      2021-03-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43063  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 21:53:14  

Additional Information
 Earth MOID = 1.01016 au 
 Jupiter MOID = 2.36144 au 
 T_jup = 3.527 
[ 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 13.06   n/a E2021B10  
diameter diameter 10.251 km 0.189 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 5.199 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Albers, K.; Kragh, K.; Monnier, A.; Pligge, Z.; et al. (2010) Minor Planet Bull. 37, 152-158.]
geometric albedo albedo 0.143   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
SMASSII spectral type spec_B Xc   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

4838 Billmclaughlin           Discovered 1989 July 2 by E. F. Helin at Palomar.
Named in honor of William I. McLaughlin (b. 1935) on the occasion of his retirement from the Jet Propulsion Laboratory, where he made innovative contributions to many projects, including Viking, Seasat, the Infrared Astronomical Satellite and Voyager (Uranus), and to the management of two technical sections. He also served as deputy manager of the astrophysics and fundamental physics program office. For 14 years McLaughlin wrote a column in Spaceflight called "Space at JPL". He takes a special interest in philosophy, mathematics, astronomy and epistemology, as well as space exploration and has written numerous papers.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19990402/MPCPages.arcLast Updated: 2010-06-11

Alternate Designations
 1989 NJ = 1967 JA = 1970 CC = 1986 TH2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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