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91129 (1998 HT135)
Classification: Main-belt Asteroid          SPK-ID: 2091129
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06899121097276804 4.41e-08  
a 2.653450228854567 2.1906e-08 au
q 2.470385484309922 1.2435e-07 au
i 8.819326146468489 5.6415e-06 deg
node 202.4575855258819 3.0725e-05 deg
peri 31.10020737221651 5.7098e-05 deg
M 8.379606358805303 5.2693e-05 deg
tp 2458963.751809197994
(2020-Apr-24.25180920)
0.00023085 TDB
period 1578.755388052427
4.32
1.9551e-05
5.353e-08
d
yr
n .2280277253362857 2.8238e-09 deg/d
Q 2.836514973399212 2.3418e-08 au
  Orbit Determination Parameters
   # obs. used (total)      469  
   data-arc span      8863 days (24.27 yr)  
   first obs. used      1995-10-23  
   last obs. used      2020-01-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60752  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 22:24:04  

Additional Information
 Earth MOID = 1.46487 au 
 Jupiter MOID = 2.14516 au 
 T_jup = 3.369 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456734.5 (2014-Mar-18.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0699503362728552 4.4455e-08  
q 2.468158518158723 1.2597e-07 au
tp 2457379.376830824848
(2015-Dec-22.87683082)
0.00021627 TDB
node 202.5924007755737 3.0757e-05 deg
peri 29.83343105417295 5.6157e-05 deg
i 8.8147163313783 5.6371e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      469  
   data-arc span      8863 days (24.27 yr)  
   first obs. used      1995-10-23  
   last obs. used      2020-01-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60752  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 22:24:04  

Additional Information
 Jupiter MOID = 2.14516 au 
 T_jup = 3.369 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.976249124031291E-15 -5.529370952564946E-15 -4.090607785741696E-12 -9.910886797937421E-15 -8.564302745277848E-13 -3.729314658040154E-16
q -5.529370952564946E-15 1.586801605143468E-14 1.295856546709487E-11 2.910523984741295E-14 2.691950243618656E-12 1.707870198906619E-15
tp -4.090607785741696E-12 1.295856546709487E-11 4.677084829851034E-8 3.483111202972345E-11 1.017543493718863E-8 5.793572766014993E-12
node -9.910886797937421E-15 2.910523984741295E-14 3.483111202972345E-11 9.459924736518992E-10 -9.269857723494364E-10 -4.97282637954672E-11
peri -8.564302745277848E-13 2.691950243618656E-12 1.017543493718863E-8 -9.269857723494364E-10 3.153664236539941E-9 5.03595823010439E-11
i -3.729314658040154E-16 1.707870198906619E-15 5.793572766014993E-12 -4.97282637954672E-11 5.03595823010439E-11 3.177738704321728E-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 15.4   n/a MPO426567  

91129 (1998 HT135)          Discovered 1998-Apr-19 by LINEAR at Socorro
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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