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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 ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05452974309898947 4.9239e-08  
a 3.218026902994293 2.1316e-08 au
q 3.042548722688378 1.5522e-07 au
i 14.54763871419742 5.3498e-06 deg
node 359.5770749875834 1.5818e-05 deg
peri 181.3425447102027 4.0906e-05 deg
M 93.45670461783422 3.6611e-05 deg
tp 2458453.117517141743
(2018-Nov-30.61751714)
0.00021558 TDB
period 2108.54528452278
5.77
2.095e-05
5.736e-08
d
yr
n .1707338242353555 1.6964e-09 deg/d
Q 3.393505083300209 2.2478e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1614  
   data-arc span      15486 days (42.40 yr)  
   first obs. used      1978-03-06  
   last obs. used      2020-07-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48868  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 08:16:16  

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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