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100840 (1998 HD19)
Classification: Main-belt Asteroid          SPK-ID: 2100840
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2166795737428122 4.7585e-08  
a 2.211729538471271 1.0542e-08 au
q 1.732492924840929 1.0275e-07 au
i 3.836694765829107 5.7408e-06 deg
node 224.6590412081102 8.4403e-05 deg
peri 50.2528506060484 8.5995e-05 deg
M 208.0082304675047 1.9004e-05 deg
tp 2459507.740619782939
(2021-Oct-20.24061978)		 6.5643e-05 TDB
period 1201.424417147914
3.29		 8.5895e-06
2.352e-08		 d
yr
n .2996443179127418 2.1423e-09 deg/d
Q 2.690966152101613 1.2826e-08 au
   Orbit Determination Parameters
   # obs. used (total)      480  
   data-arc span      7419 days (20.31 yr)  
   first obs. used      1998-03-22  
   last obs. used      2018-07-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60277  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Oct-04 03:57:41  

Additional Information
 Earth MOID = .71936 au 
 Jupiter MOID = 2.43046 au 
 T_jup = 3.623 
[ 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 16.7   n/a MPO453462  
diameter diameter 4.124 km 0.119 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.022   0.003 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

100840 (1998 HD19)          Discovered 1998-Apr-18 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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