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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2383298436090649 3.4015e-08  
a 2.177743903021616 6.2737e-09 au
q 1.65872253919388 7.5605e-08 au
i 4.562240250159615 4.252e-06 deg
node 56.72994191875904 4.4277e-05 deg
peri 279.1654956513737 4.5201e-05 deg
M 290.3204921326531 9.0795e-06 deg
tp 2459227.701508516651
(2021-Jan-13.20150852)		 3.0087e-05 TDB
period 1173.839275984951
3.21		 5.0724e-06
1.389e-08		 d
yr
n .3066859384969287 1.3253e-09 deg/d
Q 2.696765266849352 7.7689e-09 au
   Orbit Determination Parameters
   # obs. used (total)      556  
   data-arc span      7937 days (21.73 yr)  
   first obs. used      1998-09-22  
   last obs. used      2020-06-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58519  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-24 01:57:43  

Additional Information
 Earth MOID = .65711 au 
 Jupiter MOID = 2.69631 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 16.5   n/a MPO432709  

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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