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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 43 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1850451327475924 3.9743e-08  
a 3.152343297575392 1.5586e-08 au
q 2.569017513609571 1.2062e-07 au
i 3.641917472163933 3.8892e-06 deg
node 222.1739572606141 5.6797e-05 deg
peri 125.7866146702046 5.7568e-05 deg
M 100.5901177644245 9.8429e-06 deg
tp 2458629.282501103925
(2019-May-25.78250110)
5.5101e-05 TDB
period 2044.319105820898
5.60
1.5162e-05
4.151e-08
d
yr
n .1760977525352832 1.306e-09 deg/d
Q 3.735669081541214 1.847e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2772  
   data-arc span      29034 days (79.49 yr)  
   first obs. used      1941-09-23  
   last obs. used      2021-03-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41312  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 21:15:47  

Additional Information
 Earth MOID = 1.56301 au 
 Jupiter MOID = 1.72444 au 
 T_jup = 3.177 
[ show covariance matrix ]

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 11.82   n/a E2021B10  
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. 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:
[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

[ show close-approach data ]
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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