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120915 (1998 SX81)
Classification: Main-belt Asteroid          SPK-ID: 2120915
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 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1073704152184878 4.3976e-08  
a 2.159267171467588 9.0552e-09 au
q 1.927425758699464 9.9187e-08 au
i 1.695212753031975 4.6598e-06 deg
node 213.5503485314323 0.00010838 deg
peri 204.2658529815334 0.0001104 deg
M 255.3742391113243 2.2091e-05 deg
tp 2459337.317097085574
(2021-May-02.81709709)
7.2251e-05 TDB
period 1158.932120740551
3.17
7.2902e-06
1.996e-08
d
yr
n .3106307898084335 1.954e-09 deg/d
Q 2.391108584235713 1.0027e-08 au
  Orbit Determination Parameters
   # obs. used (total)      550  
   data-arc span      7977 days (21.84 yr)  
   first obs. used      1998-09-26  
   last obs. used      2020-07-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56497  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 10:11:41  

Additional Information
 Earth MOID = .939548 au 
 Jupiter MOID = 2.87175 au 
 T_jup = 3.690 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 17.0   n/a MPO475061  
rotation period rot_per 7.32 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 [Result based on fragmentary lightcurve(s), may be completely wrong.]

120915 (1998 SX81)          Discovered 1998-Sep-26 by LINEAR at Socorro
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

Alternate Designations
 1998 SX81 = 2000 FG67 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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