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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 ]

[ show orbit diagram ]
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 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457695.5 (2016-Nov-03.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1946653470318789 6.4448e-08  
q 2.093426171842096 1.6221e-07 au
tp 2457106.389311406643
(2015-Mar-24.88931141)
5.5222e-05 TDB
node 300.2737393358149 0.00011628 deg
peri 287.9268258033067 0.00011684 deg
i 3.097954958095004 4.0308e-06 deg
  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
 Jupiter MOID = 1.9029 au 
 T_jup = 3.387 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.153601578245335E-15 -1.043412802000493E-14 -2.133835350299316E-12 -9.680046893243832E-14 -4.670336416449046E-13 -2.590310418627397E-15
q -1.043412802000493E-14 2.631056131741671E-14 5.268659574679375E-12 2.419171605664957E-13 1.162966921251376E-12 6.479893608581116E-15
tp -2.133835350299316E-12 5.268659574679375E-12 3.049504475399115E-9 7.646958036072904E-11 6.892961771942567E-10 1.660281873737066E-12
node -9.680046893243832E-14 2.419171605664957E-13 7.646958036072904E-11 1.352216389344405E-8 -1.348371175708185E-8 9.905749140194461E-11
peri -4.670336416449046E-13 1.162966921251376E-12 6.892961771942567E-10 -1.348371175708185E-8 1.365056858163662E-8 -9.853343338133319E-11
i -2.590310418627397E-15 6.479893608581116E-15 1.660281873737066E-12 9.905749140194461E-11 -9.853343338133319E-11 1.624709295023725E-11

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

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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