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3866 Langley (1988 BH4)
Classification: Main-belt Asteroid          SPK-ID: 2003866
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 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1849549784983038 4.1799e-08  
a 3.151652745714799 1.5859e-08 au
q 2.568738879896998 1.2809e-07 au
i 3.642394027271591 4.422e-06 deg
node 222.1824462609296 5.918e-05 deg
peri 125.7163405229653 6.0041e-05 deg
M 65.43967939636538 1.0184e-05 deg
tp 2458629.012137024348
(2019-May-25.51213702)
5.7466e-05 TDB
period 2043.64740024479
5.60
1.5426e-05
4.223e-08
d
yr
n .1761556323056898 1.3296e-09 deg/d
Q 3.734566611532599 1.8793e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2480  
   data-arc span      28893 days (79.10 yr)  
   first obs. used      1941-09-23  
   last obs. used      2020-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42667  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:56:30  

Additional Information
 Earth MOID = 1.56448 au 
 Jupiter MOID = 1.72472 au 
 T_jup = 3.178 
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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 11.7   n/a MPO332854  
diameter diameter 23.310 km 0.413 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 9.500 h n/a LCDB (Rev. 2019-August); 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.043   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

3866 Langley           Discovered 1988 Jan. 20 by H. Debehogne at the European Southern Observatory.
Samuel Pierpont Langley (1834-1906), third secretary of the Smithsonian Institution, was founder of its Astrophysical Observatory. While Allegheny Observatory director he invented a bolometer. He developed a working wing and in 1896 conducted the first successful flight of an unmanned, heavier-than-air flying machine.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20040713/MPCPages.arcLast Updated: 2004-07-14

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Alternate Designations
 1988 BH4 = 1941 SD2 = 1964 XK = 1975 XC7 = 1975 YN = 1977 CO1 = 1980 TU9 = 1983 AL2 = 1985 OJ = 1986 XZ 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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