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117704 Lopez-Alegria (2005 EN317)
Classification: Main-belt Asteroid          SPK-ID: 2117704
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08687083747376025 3.6668e-08  
a 2.519495120664233 1.4232e-08 au
q 2.300624469521079 9.5282e-08 au
i 2.641655340548895 4.2e-06 deg
node 53.4724017078092 0.00011277 deg
peri 186.7093057225361 0.00011705 deg
M 288.8072334500525 3.3066e-05 deg
tp 2459489.369758588432
(2021-Oct-01.86975859)
0.00013476 TDB
period 1460.725831168199
4.00
1.2377e-05
3.389e-08
d
yr
n .2464528197684394 2.0882e-09 deg/d
Q 2.738365771807388 1.5468e-08 au
  Orbit Determination Parameters
   # obs. used (total)      321  
   data-arc span      10223 days (27.99 yr)  
   first obs. used      1993-03-19  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54672  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 16:53:52  

Additional Information
 Earth MOID = 1.28668 au 
 Jupiter MOID = 2.25581 au 
 T_jup = 3.450 
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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 16.6   n/a MPO453648  

117704 Lopez-Alegria           Discovered 2005 Mar. 12 by M. W. Buie at Kitt Peak.
Michael Lopez-Alegria (b. 1958) is a retired astronaut who flew on four NASA missions aboard the Space Shuttle, the Soyuz spacecraft and the International Space Station. He performed ten spacewalks over his 257 days in space. While in space, he performed experiments on materials, biotechnology and combustion.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2021-01-27Last Updated: 2021-02-23

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Alternate Designations
 2005 EN317 = 1993 FM82 = 2001 FY191 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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