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120900 (1998 SP25)
Classification: Mars-crossing Asteroid          SPK-ID: 2120900
[ 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 .2382942662487284 3.3562e-08  
a 2.178022186394857 6.3397e-09 au
q 1.659011987614444 7.4697e-08 au
i 4.561513251944895 4.2306e-06 deg
node 56.72086802337803 4.3236e-05 deg
peri 279.1154187160481 4.4199e-05 deg
M 351.6925313537973 9.1949e-06 deg
tp 2459227.593061699290
(2021-Jan-13.09306170)		 3.0047e-05 TDB
period 1174.064282048517
3.21		 5.1262e-06
1.403e-08		 d
yr
n .3066271630134843 1.3388e-09 deg/d
Q 2.697032385175271 7.8505e-09 au
   Orbit Determination Parameters
   # obs. used (total)      560  
   data-arc span      7945 days (21.75 yr)  
   first obs. used      1998-09-22  
   last obs. used      2020-06-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58336  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 17:53:55  

Additional Information
 Earth MOID = .655529 au 
 Jupiter MOID = 2.69608 au 
 T_jup = 3.642 
[ 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 16.57   n/a E2021B55  

120900 (1998 SP25)          Discovered 1998-Sep-22 by LONEOS at Anderson Mesa
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

Alternate Designations
 1998 SP25 = 2001 MX16 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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