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JPL Small-Body Database Browser
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3991 Basilevsky (1987 SW3)
Classification: Main-belt Asteroid          SPK-ID: 2003991
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 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1742708827295408 3.2391e-08  
a 2.24987612702162 7.3491e-09 au
q 1.857788228333442 7.5001e-08 au
i 3.873624217540782 3.5643e-06 deg
node 282.7489887304191 5.8183e-05 deg
peri 356.1262819080549 5.9525e-05 deg
M 306.7746250694745 1.4188e-05 deg
tp 2459182.743717910313
(2020-Nov-29.24371791)
4.8816e-05 TDB
period 1232.640230967837
3.37
6.0395e-06
1.654e-08
d
yr
n .2920560200419043 1.431e-09 deg/d
Q 2.641964025709799 8.6298e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2342  
   data-arc span      18137 days (49.66 yr)  
   first obs. used      1970-08-31  
   last obs. used      2020-04-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46117  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 02:02:16  

Additional Information
 Earth MOID = .841354 au 
 Jupiter MOID = 2.48586 au 
 T_jup = 3.605 
[ 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 13.1   n/a MPO332856  
diameter diameter 5.628 km 0.070 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 5.440 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 0.370   0.033 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

3991 Basilevsky (1987 SW3)          Discovered 1987-Sep-26 by Bowell, E. at Flagstaff (AM)
Discovered at the Anderson Mesa station, which is operated by the Lowell Observatory.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1987 SW3 = 1936 MJ = 1970 QO1 = 1976 GD8 = 1976 GG8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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