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120814 (1998 HW37)
Classification: Main-belt Asteroid          SPK-ID: 2120814
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 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1954693827199949 6.3703e-08  
a 2.597630082569017 1.3973e-08 au
q 2.089872933794362 1.6044e-07 au
i 3.100240977359505 4.0084e-06 deg
node 300.233451934647 0.00011571 deg
peri 287.8092067204787 0.00011625 deg
M 132.7366603570732 1.1707e-05 deg
tp 2458636.664040251082
(2019-Jun-02.16404025)
5.0543e-05 TDB
period 1529.200335186782
4.19
1.2339e-05
3.378e-08
d
yr
n .2354171600126076 1.8995e-09 deg/d
Q 3.105387231343672 1.6705e-08 au
  Orbit Determination Parameters
   # obs. used (total)      419  
   data-arc span      9188 days (25.16 yr)  
   first obs. used      1995-08-22  
   last obs. used      2020-10-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .60929  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 17:08:15  

Additional Information
 Earth MOID = 1.08129 au 
 Jupiter MOID = 1.90236 au 
 T_jup = 3.387 
[ 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 16.3   n/a MPO432708  

120814 (1998 HW37)          Discovered 1998-Apr-20 by LINEAR at Socorro
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

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