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155432 (1997 SS2)
Classification: Main-belt Asteroid          SPK-ID: 2155432
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2268714842687148 6.7826e-08  
a 2.39527454926128 9.7303e-09 au
q 1.851855057039296 1.6597e-07 au
i 2.141779226673059 5.9285e-06 deg
node 10.68411003526508 0.00013481 deg
peri 348.9234336950608 0.00013543 deg
M 161.235807340604 1.226e-05 deg
tp 2458790.056462232888
(2019-Nov-02.55646223)
4.4791e-05 TDB
period 1354.039634229442
3.71
8.2507e-06
2.259e-08
d
yr
n .2658710948331058 1.6201e-09 deg/d
Q 2.938694041483263 1.1938e-08 au
  Orbit Determination Parameters
   # obs. used (total)      389  
   data-arc span      9538 days (26.11 yr)  
   first obs. used      1995-02-05  
   last obs. used      2021-03-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53182  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 11:15:29  

Additional Information
 Earth MOID = .847716 au 
 Jupiter MOID = 2.51452 au 
 T_jup = 3.493 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457867.5 (2017-Apr-24.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2282159674078648 6.7924e-08  
q 1.847602922686189 1.6635e-07 au
tp 2457435.662241236075
(2016-Feb-17.16224124)
4.173e-05 TDB
node 10.77228461576615 0.0001345 deg
peri 348.6905814784795 0.0001351 deg
i 2.146132453222118 5.9349e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      389  
   data-arc span      9538 days (26.11 yr)  
   first obs. used      1995-02-05  
   last obs. used      2021-03-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53182  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 11:15:29  

Additional Information
 Jupiter MOID = 2.51452 au 
 T_jup = 3.493 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.613620363871548E-15 -1.129017180448734E-14 -1.818119242340554E-12 -4.695682557871683E-14 -5.652034112985E-13 -3.555418230967188E-15
q -1.129017180448734E-14 2.767313073771011E-14 4.405786956326765E-12 1.140786601284595E-13 1.37562957838558E-12 8.805339534405101E-15
tp -1.818119242340554E-12 4.405786956326765E-12 1.74136041465286E-9 2.963086265905768E-11 5.593853696606277E-10 1.272972837287065E-12
node -4.695682557871683E-14 1.140786601284595E-13 2.963086265905768E-11 1.808973410040768E-8 -1.806588461029554E-8 -4.755223751181598E-10
peri -5.652034112985E-13 1.37562957838558E-12 5.593853696606277E-10 -1.806588461029554E-8 1.825261365640794E-8 4.756160202641045E-10
i -3.555418230967188E-15 8.805339534405101E-15 1.272972837287065E-12 -4.755223751181598E-10 4.756160202641045E-10 3.522340538483611E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 17.01   n/a MPCxxxxx  

155432 (1997 SS2)          Discovered 1997-Sep-25 by Wolf, M., Pravec, P. at Ondrejov
Reference: 20070502/Numbers.arcLast Updated: 2007-05-02

Alternate Designations
 1997 SS2 = 2003 FD97 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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