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JPL Small-Body Database Browser
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3443 Leetsungdao (1979 SB1)
Classification: Mars-crossing Asteroid          SPK-ID: 2003443
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3065311424429007 2.9775e-08  
a 2.392536307475964 6.8522e-09 au
q 1.659149419809238 7.2027e-08 au
i 12.70990363438464 5.1025e-06 deg
node 184.5838179166674 1.4445e-05 deg
peri 112.3650186319382 1.6551e-05 deg
M 37.74183418949189 8.0231e-06 deg
tp 2458858.787965194014
2.9825e-05 TDB
period 1351.718421368056
n .2663276569358645 1.1441e-09 deg/d
Q 3.12592319514269 8.9526e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1940  
   data-arc span      29644 days (81.16 yr)  
   first obs. used      1938-06-03  
   last obs. used      2019-08-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43801  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 16:47:26  

Additional Information
 Earth MOID = .693647 au 
 Jupiter MOID = 2.28189 au 
 T_jup = 3.434 
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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.1   n/a MPO337279  
diameter diameter 8.852 km 2.033 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 3.439 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Behrend, R. (2001) Observatoire de Geneve web site,]
[Ivanova, V.G.; Apostolovska, G.; Borisov, G.B.; Bilkina, B.I. (2002) Proc. ACM 2002, ESA SP 500, 505-508.]
[Stephens, R.D. (2002) Minor Planet Bull. 29, 2-3.]
[Ferrero, A. (2013) Minor Planet Bull. 40, 31-32.]
[Warner, B.D. (2017) Minor Planet Bull. 44, 12-19.]
geometric albedo albedo 0.132   0.092 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
SMASSII spectral type spec_B T   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)

3443 Leetsungdao           Discovered 1979 Sept. 26 at the Purple Mountain Observatory.
Named in honor of the theoretical physicist Tsung-Dao Lee (b. 1926), professor at Columbia University, winner of the Nobel prize in physics in 1957. Among his outstanding works is the discovery of parity and other symmetry violations in weak interactions. From the late 1940s onward, he made many other landmark contributions to weak interactions. In the 1970s and 1980s Lee established the field of nontopological solitons and discovered a large class of new astronomical solutions of general relativity, called soliton stars.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19960828/MPCPages.arcLast Updated: 2003-09-26

Alternate Designations
 1979 SB1 = 1938 LA = 1968 UP2 = 1971 FT = 1975 JJ = 1978 EH7 = 1986 JB 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
FirstGov 2020-May-28 17:56 UT
(server date/time)  
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