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217628 Lugh (1990 HA)
Classification: Apollo [NEO, PHA]          SPK-ID: 2217628
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbit Diagram
Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet was implemented using 2-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances. For accurate long-term ephemerides, please instead use our Horizons system.

Note: If the applet has stopped working because of a recent Java upgrade, here is a possible workaround.
Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).

Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .7033572514115946 3.3676e-07  
a 2.55067682819574 4.6484e-08 au
q .7566397850767402 8.6785e-07 au
i 4.022555341723122 4.2329e-05 deg
node 183.1273855509696 0.00029441 deg
peri 310.2259445984269 0.00029406 deg
M 153.5771830278038 2.5403e-05 deg
tp 2456965.745514301416
9.6292e-05 JED
period 1487.926854408575
n .2419473772741965 6.614e-09 deg/d
Q 4.344713871314739 7.9179e-08 au
  Orbit Determination Parameters
   # obs. used (total)      66  
   data-arc span      19724 days (54.00 yr)  
   first obs. used      1960-09-24  
   last obs. used      2014-09-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .61342  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Oct-09 19:25:14  

Additional Information
 Earth MOID = .0194293 au 
 Jupiter MOID = .791418 au 
 T_jup = 3.033 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.3 mag n/a MPO159827  
diameter diameter 1.4 km n/a Hazards due to Comets and Asteroids (1994), Ed. T. Gehrels, pp.540-543 based on assumed medium albedo (0.15)
rotation period rot_per 8.55 h n/a LCDB (Rev. 2016-February); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Wisniewski, W.Z.; Michalowski, T.M.; Harris, A.W.; McMillan, R.S. (1997) Icarus 126, 395-449; 1995, Lunar & Planetary Science XXVI, 1511-1512.]

217628 Lugh           Discovered 1990 Apr. 17 by A. Mrkos at Klet.
Lugh (or Lugus) is the Celtic God of the sun and light. He was known for many skills as smith, warrior, druid and bard. His name has been commemorated in numerous place-names in former Celtic Europe. The summer harvest festival called Lughnasadh bears his name. The name was suggested by M. Tichy.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20091202/MPCPages.arcLast Updated: 2010-04-12

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
FirstGov 2016-Apr-30 13:07 UT
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