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18693 (1998 HS19)
Classification: Main-belt Asteroid          SPK-ID: 2018693
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1236425999608445 1.7219e-08  
a 2.442062928067567 7.7689e-09 au
q 2.1401199183733 4.2045e-08 au
i 6.308334604456381 1.0026e-06 deg
node 118.5655100951028 6.2821e-06 deg
peri 327.6504688072424 6.4901e-06 deg
M 147.3518872646478 3.8978e-06 deg
tp 2458825.958939598316
(2019-Dec-08.45893960)
1.4169e-05 TDB
period 1393.90669205147
3.82
6.6516e-06
1.821e-08
d
yr
n .2582669285202822 1.2324e-09 deg/d
Q 2.744005937761834 8.7294e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1991  
   data-arc span      8992 days (24.62 yr)  
   first obs. used      1996-11-12  
   last obs. used      2021-06-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47681  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 04:39:52  

Additional Information
 Earth MOID = 1.15954 au 
 Jupiter MOID = 2.43668 au 
 T_jup = 3.482 
[ 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 14.13   n/a MPO614063  

18693 (1998 HS19)          Discovered 1998-Apr-29 by JPL/GEODSS NEAT at Haleakala
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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