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JPL Small-Body Database Browser
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91191 (1998 SE55)
Classification: Outer Main-belt Asteroid          SPK-ID: 2091191
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05452979239799594 5.5943e-08  
a 3.218026889205601 2.2169e-08 au
q 3.042548551006051 1.7972e-07 au
i 14.54764212227216 6.1038e-06 deg
node 359.5770771105723 1.6365e-05 deg
peri 181.3425649795261 4.2583e-05 deg
M 93.45668197093848 3.8125e-05 deg
tp 2458453.117653304361
(2018-Nov-30.61765330)
0.00022451 TDB
period 2108.545270970648
5.77
2.1788e-05
5.965e-08
d
yr
n .1707338253327032 1.7642e-09 deg/d
Q 3.393505227405151 2.3377e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1427  
   data-arc span      15040 days (41.18 yr)  
   first obs. used      1978-03-06  
   last obs. used      2019-05-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49188  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 06:03:41  

Additional Information
 Earth MOID = 2.04565 au 
 Jupiter MOID = 1.56992 au 
 T_jup = 3.137 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.9   n/a MPO474790  

91191 (1998 SE55)          Discovered 1998-Sep-16 by LONEOS at Anderson Mesa
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

[ show close-approach data ]
Alternate Designations
 1998 SE55 = 1978 EM5 = 1999 TQ210 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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