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136916 (1998 HW115)
Classification: Main-belt Asteroid          SPK-ID: 2136916
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 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1072107972513533 5.2263e-08  
a 3.057229298054753 2.3607e-08 au
q 2.729461307630108 1.5976e-07 au
i 10.14300853547556 5.7148e-06 deg
node 153.1904226754581 3.1629e-05 deg
peri 13.09450646565708 4.19e-05 deg
M 90.70452949343031 2.5856e-05 deg
tp 2458508.554581559658
(2019-Jan-25.05458156)
0.00013997 TDB
period 1952.497318795423
5.35
2.2615e-05
6.192e-08
d
yr
n .1843792544729839 2.1356e-09 deg/d
Q 3.384997288479398 2.6138e-08 au
  Orbit Determination Parameters
   # obs. used (total)      489  
   data-arc span      7680 days (21.03 yr)  
   first obs. used      1998-04-21  
   last obs. used      2019-05-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5871  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 08:02:49  

Additional Information
 Earth MOID = 1.73818 au 
 Jupiter MOID = 1.59322 au 
 T_jup = 3.202 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456695.5 (2014-Feb-07.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1072029831382679 5.195e-08  
q 2.726126455754232 1.5911e-07 au
tp 2456551.716379281217
(2013-Sep-16.21637928)
0.00014155 TDB
node 153.2640303815472 3.1652e-05 deg
peri 11.68811273334076 4.1979e-05 deg
i 10.14202526745649 5.7156e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      489  
   data-arc span      7680 days (21.03 yr)  
   first obs. used      1998-04-21  
   last obs. used      2019-05-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5871  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 08:02:49  

Additional Information
 Jupiter MOID = 1.59322 au 
 T_jup = 3.202 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.698786038213661E-15 -8.190197499248948E-15 1.236159965317149E-12 1.74685439327821E-14 2.139370310990514E-13 -4.524976960464629E-15
q -8.190197499248948E-15 2.531753436778483E-14 -4.146066025652255E-12 -5.015691008078078E-14 -7.239764815800188E-13 1.622540104281492E-14
tp 1.236159965317149E-12 -4.146066025652255E-12 2.003505733457995E-8 2.598754659897131E-11 3.94606938883392E-9 -6.142645304198962E-12
node 1.74685439327821E-14 -5.015691008078078E-14 2.598754659897131E-11 1.001864070895799E-9 -9.804373756307581E-10 3.94778568534853E-11
peri 2.139370310990514E-13 -7.239764815800188E-13 3.94606938883392E-9 -9.804373756307581E-10 1.762235039564364E-9 -3.995327092732482E-11
i -4.524976960464629E-15 1.622540104281492E-14 -6.142645304198962E-12 3.94778568534853E-11 -3.995327092732482E-11 3.266757102296361E-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 14.9   n/a MPO436675  

136916 (1998 HW115)          Discovered 1998-Apr-23 by LINEAR at Socorro
Reference: 20061205/Numbers.arcLast Updated: 2006-12-13

[ show close-approach data ]
Alternate Designations
 1998 HW115 = 2003 EK27 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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