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JPL Small-Body Database Browser
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6939 Lestone (1952 SW1)
Classification: Main-belt Asteroid          SPK-ID: 2006939
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .102453164626483 4.9155e-08  
a 2.58913454797969 1.1209e-08 au
q 2.323869519895412 1.2579e-07 au
i 14.101728146231 5.4861e-06 deg
node 36.49157474498363 1.4971e-05 deg
peri 184.8353477439122 2.3793e-05 deg
M 259.9522671691107 1.8495e-05 deg
tp 2459423.397489796100
(2021-Jul-27.89748980)
7.8376e-05 TDB
period 1521.704610577557
4.17
9.882e-06
2.706e-08
d
yr
n .2365767951924411 1.5363e-09 deg/d
Q 2.854399576063968 1.2358e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1572  
   data-arc span      24603 days (67.36 yr)  
   first obs. used      1952-09-22  
   last obs. used      2020-02-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49533  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 18:16:19  

Additional Information
 Earth MOID = 1.31629 au 
 Jupiter MOID = 2.11695 au 
 T_jup = 3.371 
[ 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 13.8   n/a MPO502219 IRAS observations used: 2
diameter diameter 5.297 km 0.206 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 2.821 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 0.229   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

6939 Lestone (1952 SW1)          Discovered 1952-Sep-22 by Cunningham, L. E. at Mount Wilson
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1952 SW1 = 4849 T-1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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