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JPL Small-Body Database Browser
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18599 (1998 BK8)
Classification: Main-belt Asteroid          SPK-ID: 2018599
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09712131594041527 4.8635e-08  
a 2.280825716101178 7.3674e-09 au
q 2.059308921122692 1.1056e-07 au
i 3.561392571802519 3.7034e-06 deg
node 84.39657040459792 8.0638e-05 deg
peri 99.0406685946145 8.2798e-05 deg
M 20.55456917283035 1.7967e-05 deg
tp 2458528.663948046705
(2019-Feb-14.16394805)
6.2847e-05 TDB
period 1258.162041040001
3.44
6.0961e-06
1.669e-08
d
yr
n .2861316652840861 1.3864e-09 deg/d
Q 2.502342511079665 8.0829e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1371  
   data-arc span      8871 days (24.29 yr)  
   first obs. used      1995-05-05  
   last obs. used      2019-08-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50066  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 01:26:24  

Additional Information
 Earth MOID = 1.06519 au 
 Jupiter MOID = 2.45887 au 
 T_jup = 3.597 
[ 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 15.0   n/a MPO337415  
diameter diameter 2.814 km 0.838 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 10.644 h n/a LCDB (Rev. 2019-January); 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 0.169   0.117 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18599 (1998 BK8)          Discovered 1998-Jan-25 by Kobayashi, T. at Oizumi
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 BK8 = 1995 JR1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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