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39829 (1998 BS4)
Classification: Main-belt Asteroid          SPK-ID: 2039829
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1333442482248776 4.2844e-08  
a 2.275056648535107 1.1241e-08 au
q 1.971690930067184 9.9285e-08 au
i 5.860024970695909 4.5877e-06 deg
node 283.9286608239374 4.8565e-05 deg
peri 27.66043615300822 5.3023e-05 deg
M 354.9886618592626 2.4575e-05 deg
tp 2459017.947690805093
(2020-Jun-17.44769080)
8.5623e-05 TDB
period 1253.391512094051
3.43
9.2896e-06
2.543e-08
d
yr
n .2872207099907235 2.1288e-09 deg/d
Q 2.578422367003031 1.274e-08 au
  Orbit Determination Parameters
   # obs. used (total)      693  
   data-arc span      10698 days (29.29 yr)  
   first obs. used      1991-01-12  
   last obs. used      2020-04-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58709  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 08:46:27  

Additional Information
 Earth MOID = .959268 au 
 Jupiter MOID = 2.65445 au 
 T_jup = 3.591 
[ 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 15.7   n/a MPO333170  
diameter diameter 1.641 km 0.213 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 5.331 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 0.454   0.086 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

39829 (1998 BS4)          Discovered 1998-Jan-17 by ODAS at Caussols
Reference: 20020526/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 BS4 = 1999 LX17 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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