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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1954655244711224 6.4308e-08  
a 2.598246789051618 1.4106e-08 au
q 2.090379117724234 1.6199e-07 au
i 3.10020815169346 4.0333e-06 deg
node 300.2331105883992 0.00011618 deg
peri 287.8861607650624 0.00011672 deg
M 85.56850630137572 1.1787e-05 deg
tp 2458636.894473162624
(2019-Jun-02.39447316)
5.0645e-05 TDB
period 1529.744941444078
4.19
1.2458e-05
3.411e-08
d
yr
n .2353333488785133 1.9165e-09 deg/d
Q 3.106114460379002 1.6863e-08 au
  Orbit Determination Parameters
   # obs. used (total)      415  
   data-arc span      9188 days (25.16 yr)  
   first obs. used      1995-08-22  
   last obs. used      2020-10-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .611  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 17:54:33  

Additional Information
 Earth MOID = 1.08301 au 
 Jupiter MOID = 1.9029 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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