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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1429639409792062 3.4426e-08  
a 2.352833579407878 8.3037e-09 au
q 2.016463218427516 7.9666e-08 au
i 8.877319546371011 3.7849e-06 deg
node 217.810995323683 2.3514e-05 deg
peri 40.55211272155623 2.691e-05 deg
M 115.4650839374805 1.2552e-05 deg
tp 2458177.701520947365
(2018-Feb-28.20152095)
4.5793e-05 TDB
period 1318.211941381019
3.61
6.9785e-06
1.911e-08
d
yr
n .2730972074360422 1.4457e-09 deg/d
Q 2.689203940388241 9.4909e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2245  
   data-arc span      19173 days (52.49 yr)  
   first obs. used      1967-05-02  
   last obs. used      2019-10-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46169  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 02:39:54  

Additional Information
 Earth MOID = 1.01085 au 
 Jupiter MOID = 2.36192 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 13.0   n/a MPO410127  
diameter diameter 10.251 km 0.189 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 5.199 h n/a LCDB (Rev. 2019-January); 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] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
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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