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

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .7086220252612269 2.181e-07  
a 2.546902668456462 3.3608e-08 au
q .7421113413916208 5.6304e-07 au
i 4.12139050736416 2.9747e-05 deg
node 180.891519130381 0.00025651 deg
peri 312.461674545748 0.00025381 deg
M 179.9333445120558 1.2846e-05 deg
tp 2458458.462076835062
(2018-Dec-05.96207683)
4.6992e-05 TDB
period 1484.625615467729
4.06
2.9386e-05
8.045e-08
d
yr
n .2424853756053391 4.7996e-09 deg/d
Q 4.351693995521304 5.7423e-08 au
  Orbit Determination Parameters
   # obs. used (total)      127  
   data-arc span      21436 days (58.69 yr)  
   first obs. used      1960-09-24  
   last obs. used      2019-06-03  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50184  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 23:59:42  

Additional Information
 Earth MOID = .0250345 au 
 Jupiter MOID = .777647 au 
 T_jup = 3.028 
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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 16.62   n/a MPCxxxxx  
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. 2020-October); 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 Sci. 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

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