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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1072790685009223 4.1711e-08  
a 2.15843355978778 8.8518e-09 au
q 1.926878818072617 9.4914e-08 au
i 1.695477469661923 4.0093e-06 deg
node 213.528459703966 0.00010729 deg
peri 204.4878911504218 0.00010925 deg
M 317.3136795076306 2.214e-05 deg
tp 2459337.838618413090
(2021-May-03.33861841)
7.1724e-05 TDB
period 1158.261055495535
3.17
7.1251e-06
1.951e-08
d
yr
n .3108107609177815 1.912e-09 deg/d
Q 2.389988301502942 9.8014e-09 au
  Orbit Determination Parameters
   # obs. used (total)      622  
   data-arc span      8110 days (22.20 yr)  
   first obs. used      1998-09-26  
   last obs. used      2020-12-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55162  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 09:26:11  

Additional Information
 Earth MOID = .938295 au 
 Jupiter MOID = 2.87172 au 
 T_jup = 3.691 
[ 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 17.04   n/a E2021B55  
rotation period rot_per 7.32 h n/a LCDB (Rev. 2020-October); 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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