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120944 (1998 TH23)
Classification: Main-belt Asteroid          SPK-ID: 2120944
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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1107084232310068 4.7012e-08  
a 3.152378749384422 2.9556e-08 au
q 2.803383868613139 1.5522e-07 au
i 17.87337584236033 6.3354e-06 deg
node 19.76573108785343 1.7842e-05 deg
peri 68.44389042560101 3.9373e-05 deg
M 251.0742908231442 3.4733e-05 deg
tp 2459619.062957848192
(2022-Feb-08.56295785)
0.00019973 TDB
period 2044.353592078005
5.60
2.8751e-05
7.872e-08
d
yr
n .1760947819374407 2.4766e-09 deg/d
Q 3.501373630155704 3.2828e-08 au
  Orbit Determination Parameters
   # obs. used (total)      516  
   data-arc span      8055 days (22.05 yr)  
   first obs. used      1998-09-25  
   last obs. used      2020-10-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51659  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 17:53:36  

Additional Information
 Earth MOID = 1.87389 au 
 Jupiter MOID = 1.87866 au 
 T_jup = 3.123 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457607.5 (2016-Aug-07.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1081257432649143 4.5123e-08  
q 2.811620221155398 1.4847e-07 au
tp 2457559.193927762099
(2016-Jun-19.69392776)
0.00020122 TDB
node 20.04393023138432 1.778e-05 deg
peri 66.02222527127192 4.1045e-05 deg
i 17.93257579667466 6.3412e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      516  
   data-arc span      8055 days (22.05 yr)  
   first obs. used      1998-09-25  
   last obs. used      2020-10-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51659  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 17:53:36  

Additional Information
 Jupiter MOID = 1.87866 au 
 T_jup = 3.123 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.036087098099086E-15 -6.59555351932804E-15 2.161242780249727E-12 4.678554296457655E-15 4.761565219291029E-13 -1.307665877950579E-15
q -6.59555351932804E-15 2.204299354299184E-14 -5.483306661534613E-12 -1.819746604150418E-14 -1.26349730355791E-12 1.014762222305255E-14
tp 2.161242780249727E-12 -5.483306661534613E-12 4.048947505278641E-8 4.025150368449462E-11 7.482304776721508E-9 1.497556809102836E-11
node 4.678554296457655E-15 -1.819746604150418E-14 4.025150368449462E-11 3.161437089538231E-10 -2.92029984039341E-10 -4.309593567249435E-11
peri 4.761565219291029E-13 -1.26349730355791E-12 7.482304776721508E-9 -2.92029984039341E-10 1.684704065835493E-9 4.35676447168453E-11
i -1.307665877950579E-15 1.014762222305255E-14 1.497556809102836E-11 -4.309593567249435E-11 4.35676447168453E-11 4.021113526586181E-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 14.8   n/a MPO351700  

120944 (1998 TH23)          Discovered 1998-Oct-14 by Spacewatch at Kitt Peak
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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