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18710 (1998 HF100)
Classification: Main-belt Asteroid          SPK-ID: 2018710
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 .1529249470073552 3.3154e-08  
a 2.671553964287733 1.0039e-08 au
q 2.263006715871742 8.5393e-08 au
i 4.682711576841442 3.2292e-06 deg
node 123.0784318519257 4.3404e-05 deg
peri 55.94614691762318 4.4966e-05 deg
M 100.0317001483105 1.1462e-05 deg
tp 2458757.320663405894
(2019-Sep-30.82066341)
4.994e-05 TDB
period 1594.940013389073
4.37
8.9903e-06
2.461e-08
d
yr
n .2257138180608056 1.2723e-09 deg/d
Q 3.080101212703724 1.1575e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1941  
   data-arc span      24318 days (66.58 yr)  
   first obs. used      1954-02-10  
   last obs. used      2020-09-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51252  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:35:44  

Additional Information
 Earth MOID = 1.27044 au 
 Jupiter MOID = 1.88752 au 
 T_jup = 3.359 
[ 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 13.89   n/a E2021B10  
diameter diameter 9.882 km 0.037 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.061   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18710 (1998 HF100)          Discovered 1998-Apr-21 by LINEAR at Socorro
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 HF100 = 1967 EG = 1980 DO 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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