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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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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 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09812522305613765 4.7048e-08  
a 2.280238426844659 6.4449e-09 au
q 2.05648952258935 1.0616e-07 au
i 3.560614809038066 2.7974e-06 deg
node 84.38633031807585 7.7071e-05 deg
peri 98.90005697611373 7.8178e-05 deg
M 192.3227639389176 1.4491e-05 deg
tp 2459786.287935452546
(2022-Jul-25.78793545)
5.1284e-05 TDB
period 1257.676126567917
3.44
5.3321e-06
1.46e-08
d
yr
n .2862422148239443 1.2136e-09 deg/d
Q 2.503987331099967 7.0774e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1683  
   data-arc span      9381 days (25.68 yr)  
   first obs. used      1995-05-05  
   last obs. used      2021-01-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48252  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 02:39:06  

Additional Information
 Earth MOID = 1.06146 au 
 Jupiter MOID = 2.45494 au 
 T_jup = 3.597 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457517.5 (2016-May-09.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09730528877040258 4.7083e-08  
q 2.058721989841808 1.0616e-07 au
tp 2457269.315414801248
(2015-Sep-03.81541480)
4.9743e-05 TDB
node 84.40424201542854 7.7031e-05 deg
peri 98.71170707224766 7.8162e-05 deg
i 3.561342702621575 2.7989e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1683  
   data-arc span      9381 days (25.68 yr)  
   first obs. used      1995-05-05  
   last obs. used      2021-01-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48252  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 02:39:06  

Additional Information
 Jupiter MOID = 2.45494 au 
 T_jup = 3.597 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.216768830359486E-15 -4.990990877657314E-15 3.174582849119666E-13 -4.181097942319653E-14 1.199409487873255E-13 1.00520562609348E-15
q -4.990990877657314E-15 1.126931167364923E-14 -6.988007997588294E-13 9.470311204610542E-14 -2.654631311228919E-13 -2.237094371615147E-15
tp 3.174582849119666E-13 -6.988007997588294E-13 2.474369536544917E-9 -2.885185476061594E-12 6.917390606024285E-10 -2.761400721944086E-13
node -4.181097942319653E-14 9.470311204610542E-14 -2.885185476061594E-12 5.933785441106922E-9 -5.922747095410233E-9 -5.905320643729642E-11
peri 1.199409487873255E-13 -2.654631311228919E-13 6.917390606024285E-10 -5.922747095410233E-9 6.1093317629556E-9 5.885619222561265E-11
i 1.00520562609348E-15 -2.237094371615147E-15 -2.761400721944086E-13 -5.905320643729642E-11 5.885619222561265E-11 7.833611150147971E-12

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 15.01   n/a E2021B10  
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. 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 0.169   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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