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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1744685344054536 1.5693e-08  
a 2.250379664384572 6.7988e-09 au
q 1.857759222483559 3.7041e-08 au
i 3.873413798742745 4.1208e-07 deg
node 282.7492307470152 1.0745e-05 deg
peri 356.1051716696284 1.3198e-05 deg
M 5.200410726170382 7.8937e-06 deg
tp 2459182.687812279002
(2020-Nov-29.18781228)
2.7007e-05 TDB
period 1233.054063843386
3.38
5.5879e-06
1.53e-08
d
yr
n .2919580013206337 1.3231e-09 deg/d
Q 2.643000106285585 7.9849e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2632  
   data-arc span      18265 days (50.01 yr)  
   first obs. used      1970-08-31  
   last obs. used      2020-09-02  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44297  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 15:48:32  

Additional Information
 Earth MOID = .839446 au 
 Jupiter MOID = 2.48395 au 
 T_jup = 3.604 
[ 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 13.18   n/a E2021B10  
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. 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 0.370   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

[ show close-approach data ]
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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