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173212 (1998 SX99)
Classification: Main-belt Asteroid          SPK-ID: 2173212
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 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2309648601769703 3.93e-08  
a 2.564034789570826 1.2229e-08 au
q 1.971832852908712 9.6766e-08 au
i 3.271401588664607 7.7782e-06 deg
node 270.44130362 0.0001151 deg
peri 143.1907195398847 0.00011697 deg
M 71.74736155196926 2.1744e-05 deg
tp 2458701.626278541679
(2019-Aug-06.12627854)
8.9648e-05 TDB
period 1499.630612159316
4.11
1.0728e-05
2.937e-08
d
yr
n .2400591166124813 1.7174e-09 deg/d
Q 3.156236726232938 1.5053e-08 au
  Orbit Determination Parameters
   # obs. used (total)      430  
   data-arc span      7800 days (21.36 yr)  
   first obs. used      1998-09-25  
   last obs. used      2020-02-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .6224  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 17:00:40  

Additional Information
 Earth MOID = .984414 au 
 Jupiter MOID = 2.21919 au 
 T_jup = 3.393 
[ 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 16.5   n/a MPO454189  

173212 (1998 SX99)          Discovered 1998-Sep-26 by LINEAR at Socorro
Reference: 20080122/Numbers.arcLast Updated: 2008-01-28

Alternate Designations
 1998 SX99 = 2002 RK142 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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