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190321 (1998 HH42)
Classification: Main-belt Asteroid          SPK-ID: 2190321
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 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1667696033023044 3.7961e-08  
a 2.600909663093566 1.3144e-08 au
q 2.167156990354321 1.0044e-07 au
i 5.441281184476836 4.2399e-06 deg
node 149.6821990917033 4.9786e-05 deg
peri 328.8755290801528 5.1937e-05 deg
M 217.1821472081953 1.7176e-05 deg
tp 2459808.307882084111
(2022-Aug-16.80788208)
7.5555e-05 TDB
period 1532.097236255578
4.19
1.1614e-05
3.18e-08
d
yr
n .2349720314618114 1.7812e-09 deg/d
Q 3.03466233583281 1.5336e-08 au
  Orbit Determination Parameters
   # obs. used (total)      488  
   data-arc span      9681 days (26.51 yr)  
   first obs. used      1994-05-08  
   last obs. used      2020-11-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59938  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 05:15:57  

Additional Information
 Earth MOID = 1.18515 au 
 Jupiter MOID = 2.05473 au 
 T_jup = 3.389 
[ 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 16.11   n/a E2021B55  

190321 (1998 HH42)          Discovered 1998-Apr-24 by Spacewatch at Kitt Peak
Reference: 20080917/Numbers.arcLast Updated: 2008-09-19

[ show close-approach data ]
Alternate Designations
 1998 HH42 = 2002 EP104 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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