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18705 (1998 HX88)
Classification: Outer Main-belt Asteroid          SPK-ID: 2018705
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1297710436172063 3.6951e-08  
a 3.257463055026131 1.8595e-08 au
q 2.834738674830896 1.2214e-07 au
i 1.620217948119917 4.1182e-06 deg
node 34.09180704070309 0.00014626 deg
peri 263.2947432015712 0.00014712 deg
M 235.9746439018127 1.7453e-05 deg
tp 2459940.319300314924
(2022-Dec-26.81930031)
0.00010523 TDB
period 2147.423369641631
5.88
1.8387e-05
5.034e-08
d
yr
n .1676427690456204 1.4354e-09 deg/d
Q 3.680187435221365 2.1008e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1763  
   data-arc span      14018 days (38.38 yr)  
   first obs. used      1982-11-05  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52352  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 02:46:24  

Additional Information
 Earth MOID = 1.81754 au 
 Jupiter MOID = 1.52287 au 
 T_jup = 3.166 
[ 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 13.69   n/a MPCxxxxx  
diameter diameter 9.710 km 0.157 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.052   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18705 (1998 HX88)          Discovered 1998-Apr-21 by LINEAR at Socorro
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 HX88 = 1992 HJ4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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