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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09786841803718672 4.8596e-08  
a 2.280857179444816 7.4835e-09 au
q 2.057633295523793 1.1065e-07 au
i 3.560675674253571 3.7012e-06 deg
node 84.39070179561159 8.0672e-05 deg
peri 98.99474342111839 8.2793e-05 deg
M 134.9751077579579 1.7719e-05 deg
tp 2458528.766469394251
(2019-Feb-14.26646939)
6.2278e-05 TDB
period 1258.188075112369
3.44
6.1921e-06
1.695e-08
d
yr
n .2861257447284647 1.4082e-09 deg/d
Q 2.50408106336584 8.2159e-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 = 1.06313 au 
 Jupiter MOID = 2.45587 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-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 0.169   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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