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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2166581812612378 4.6664e-08  
a 2.211563063327597 1.0168e-08 au
q 1.732409832282509 1.0094e-07 au
i 3.836664904351732 5.3062e-06 deg
node 224.649310296463 7.7329e-05 deg
peri 50.293978304863 7.8788e-05 deg
M 267.8961495562138 1.8656e-05 deg
tp 2459507.842560020305
(2021-Oct-20.34256002)
6.3694e-05 TDB
period 1201.288774293306
3.29
8.2845e-06
2.268e-08
d
yr
n .2996781520844401 2.0667e-09 deg/d
Q 2.690716294372686 1.2371e-08 au
  Orbit Determination Parameters
   # obs. used (total)      497  
   data-arc span      8333 days (22.81 yr)  
   first obs. used      1998-03-22  
   last obs. used      2021-01-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .61601  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 19:33:02  

Additional Information
 Earth MOID = .717457 au 
 Jupiter MOID = 2.42993 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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