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18325 (1984 SB2)
Classification: Main-belt Asteroid          SPK-ID: 2018325
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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.


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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 .1596495848950132 4.2173e-08  
a 2.550985724749166 1.1257e-08 au
q 2.143721912719857 1.0789e-07 au
i 26.34650903161517 4.8652e-06 deg
node 206.624206979059 1.0296e-05 deg
peri 162.4202160861439 1.9084e-05 deg
M 280.6236611557799 1.8756e-05 deg
tp 2459328.632337431286
(2021-Apr-24.13233743)
7.8268e-05 TDB
period 1488.197152895827
4.07
9.851e-06
2.697e-08
d
yr
n .2419034328210408 1.6013e-09 deg/d
Q 2.958249536778474 1.3055e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1507  
   data-arc span      25305 days (69.28 yr)  
   first obs. used      1951-07-14  
   last obs. used      2020-10-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47286  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:15:39  

Additional Information
 Earth MOID = 1.15399 au 
 Jupiter MOID = 2.52329 au 
 T_jup = 3.279 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.6   n/a MPO337413  
diameter diameter 6.550 km 0.190 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.197   0.023 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18325 (1984 SB2)          Discovered 1984-Sep-29 by Mrkos, A. at Klet
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1984 SB2 = 1999 KL5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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