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100846 (1998 HW25)
Classification: Main-belt Asteroid          SPK-ID: 2100846
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1359586847308152 3.6841e-08  
a 2.226395585445982 6.6301e-09 au
q 1.923697769958253 8.3392e-08 au
i 6.414623465044962 4.0052e-06 deg
node 40.96895429347099 2.6625e-05 deg
peri 323.3129363328679 2.9016e-05 deg
M 130.8289021547369 1.0788e-05 deg
tp 2458759.536014182472
(2019-Oct-03.03601418)
3.6628e-05 TDB
period 1213.394229254887
3.32
5.4201e-06
1.484e-08
d
yr
n .2966884062247984 1.3253e-09 deg/d
Q 2.529093400933711 7.5315e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1218  
   data-arc span      8387 days (22.96 yr)  
   first obs. used      1998-03-29  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48674  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:34:02  

Additional Information
 Earth MOID = .925157 au 
 Jupiter MOID = 2.93416 au 
 T_jup = 3.625 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457381.5 (2015-Dec-25.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1367972367696355 3.6932e-08  
q 1.921466251157759 8.364e-08 au
tp 2457545.600296501510
(2016-Jun-06.10029650)
3.7482e-05 TDB
node 40.99116301416863 2.6608e-05 deg
peri 323.1192910339821 2.8964e-05 deg
i 6.418075425952967 4.007e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1218  
   data-arc span      8387 days (22.96 yr)  
   first obs. used      1998-03-29  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48674  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:34:02  

Additional Information
 Jupiter MOID = 2.93416 au 
 T_jup = 3.625 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.36400605478134E-15 -3.082151664498846E-15 3.456769446738589E-13 -9.523472255992899E-15 1.112514722730698E-13 -1.471950138684419E-15
q -3.082151664498846E-15 6.99565055090415E-15 -8.332976330403476E-13 2.126284677032849E-14 -2.681792111556638E-13 3.414079295923132E-15
tp 3.456769446738589E-13 -8.332976330403476E-13 1.404928838132794E-9 8.125704632148322E-13 4.350894795364728E-10 -1.639968608818898E-12
node -9.523472255992899E-15 2.126284677032849E-14 8.125704632148322E-13 7.07965750434417E-10 -7.028337842810029E-10 -2.015951266161306E-11
peri 1.112514722730698E-13 -2.681792111556638E-13 4.350894795364728E-10 -7.028337842810029E-10 8.388907434791625E-10 1.954538489960536E-11
i -1.471950138684419E-15 3.414079295923132E-15 -1.639968608818898E-12 -2.015951266161306E-11 1.954538489960536E-11 1.605625726691647E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.6   n/a MPO439690  

100846 (1998 HW25)          Discovered 1998-Apr-20 by Spacewatch at Kitt Peak
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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