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129880 (1999 SX4)
Classification: Main-belt Asteroid          SPK-ID: 2129880
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .197867074368411 4.2332e-08  
a 2.739247381684883 1.6536e-08 au
q 2.197240516299565 1.1882e-07 au
i 3.945386073826671 4.2227e-06 deg
node 145.2174160284527 6.8538e-05 deg
peri 259.6185379773128 6.9395e-05 deg
M 219.5549836860137 1.3363e-05 deg
tp 2459846.524727869912
(2022-Sep-24.02472787)
6.5077e-05 TDB
period 1655.942717919054
4.53
1.4994e-05
4.105e-08
d
yr
n .2173988243098139 1.9685e-09 deg/d
Q 3.281254247070201 1.9808e-08 au
  Orbit Determination Parameters
   # obs. used (total)      662  
   data-arc span      10336 days (28.30 yr)  
   first obs. used      1992-03-05  
   last obs. used      2020-06-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53288  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 17:48:28  

Additional Information
 Earth MOID = 1.20962 au 
 Jupiter MOID = 2.13188 au 
 T_jup = 3.319 
[ show covariance matrix ]

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 15.5   n/a MPO453777  

129880 (1999 SX4)          Discovered 1999-Sep-28 by Santangelo, M. M. M. at Monte Agliale
Reference: 20060711/Numbers.arcLast Updated: 2006-07-17

[ show close-approach data ]
Alternate Designations
 1999 SX4 = 2001 DO76 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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