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18539 (1996 XX30)
Classification: Main-belt Asteroid          SPK-ID: 2018539
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2107431979155195 3.4734e-08  
a 2.602646168014149 1.0708e-08 au
q 2.054156191524275 8.8491e-08 au
i 3.648311955121094 3.8508e-06 deg
node 241.1064451259033 6.7613e-05 deg
peri 184.7776217585135 6.8419e-05 deg
M 237.8220662019808 1.2627e-05 deg
tp 2459520.988809407713
(2021-Nov-02.48880941)
5.564e-05 TDB
period 1533.631856113566
4.20
9.4647e-06
2.591e-08
d
yr
n .2347369080558157 1.4487e-09 deg/d
Q 3.151136144504023 1.2965e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1417  
   data-arc span      14869 days (40.71 yr)  
   first obs. used      1979-11-14  
   last obs. used      2020-07-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51713  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 01:20:39  

Additional Information
 Earth MOID = 1.06788 au 
 Jupiter MOID = 2.16682 au 
 T_jup = 3.379 
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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 14.3   n/a MPO384913  
diameter diameter 3.626 km 0.986 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.308   0.108 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18539 (1996 XX30)          Discovered 1996-Dec-14 by Kobayashi, T. at Oizumi
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1996 XX30 = 1979 VN3 = 1991 PH17 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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