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18711 (1998 HL100)
Classification: Main-belt Asteroid          SPK-ID: 2018711
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1153050598109528 3.8739e-08  
a 2.670363052339344 1.214e-08 au
q 2.362456680872397 1.0012e-07 au
i 12.7724054857168 4.9238e-06 deg
node 204.537526173497 1.8084e-05 deg
peri 298.2837324812289 2.9087e-05 deg
M 134.1570995640026 2.4021e-05 deg
tp 2458606.529259113840
(2019-May-03.02925911)
0.00010506 TDB
period 1593.873655691294
4.36
1.0869e-05
2.976e-08
d
yr
n .2258648285668923 1.5402e-09 deg/d
Q 2.978269423806291 1.354e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1375  
   data-arc span      10582 days (28.97 yr)  
   first obs. used      1991-10-10  
   last obs. used      2020-09-29  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47664  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:35:44  

Additional Information
 Earth MOID = 1.40188 au 
 Jupiter MOID = 2.10247 au 
 T_jup = 3.337 
[ 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 14.21   n/a E2021B10  
diameter diameter 4.156 km 0.120 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.309   0.035 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18711 (1998 HL100)          Discovered 1998-Apr-21 by LINEAR at Socorro
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 HL100 = 1999 RF111 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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