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3278 Behounek (1984 BT)
Classification: Outer Main-belt Asteroid          SPK-ID: 2003278
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 44 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .01392544236188394 4.5581e-08  
a 3.216346646044299 2.0246e-08 au
q 3.17155759620897 1.4882e-07 au
i 9.719379712235446 4.5466e-06 deg
node 78.23165445857403 2.9401e-05 deg
peri 83.74349233014537 0.00019204 deg
M 76.82921799665311 0.00018708 deg
tp 2458550.858267241041
(2019-Mar-08.35826724)
0.0010962 TDB
period 2106.894069913308
5.77
1.9894e-05
5.447e-08
d
yr
n .1708676317147795 1.6134e-09 deg/d
Q 3.261135695879628 2.0528e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2035  
   data-arc span      29509 days (80.79 yr)  
   first obs. used      1939-04-20  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45522  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 16:42:54  

Additional Information
 Earth MOID = 2.19242 au 
 Jupiter MOID = 1.77 au 
 T_jup = 3.167 
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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 11.4   n/a MPO395027  
diameter diameter 31.455 km 0.306 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
geometric albedo albedo 0.048   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

3278 Behounek (1984 BT)          Discovered 1984-Jan-27 by Mrkos, A. at Klet
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1984 BT = 1939 HE = 1953 VV1 = 1965 WN = 1982 XA2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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