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168381 (1997 LY4)
Classification: Mars-crossing Asteroid          SPK-ID: 2168381
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 2 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2721639316621485 6.8098e-08  
a 1.803432545532127 4.39e-09 AU
q 1.312603253452627 1.2359e-07 AU
i 8.359090378729688 8.295e-06 deg
node 252.7864300289201 3.9751e-05 deg
peri 51.28297437083698 4.4294e-05 deg
M 339.6318380524987 1.8614e-05 deg
tp 2456850.549255297250
(2014-Jul-12.04925530)
4.5886e-05 JED
period 884.6027419386467
2.42
3.23e-06
8.843e-09
d
yr
n .4069623379315373 1.486e-09 deg/d
Q 2.294261837611627 5.5847e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      465  
   data-arc span      22438 days (61.43 yr)  
   first obs. used      1951-07-31  
   last obs. used      2013-01-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .50541  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Aug-07 17:56:20  

Additional Information
 Earth MOID = .319978 AU 
 T_jup = 4.006 
[ 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 16.8 mag n/a MPO264361  
rotation period rot_per 46.07 h n/a Asteroid Lightcurve DataBase (Rev. 2013-Sep-12) Published Reference List:
[Pravec, P.; Sarounova, L.; Wolf, M.; Ferrin Vasquez, I.R.; Zhu, J. (2000) Planet. Space Sci. 48, 59-65.]

168381 (1997 LY4)          Discovered 1997-Jun-10 by BAO Schmidt CCD Asteroid Program at Xinglong (327)
Reference: 20071124/Numbers.arcLast Updated: 2007-11-26

[ show close-approach data ]
Alternate Designations
 1997 LY4 = 2000 YQ134 = 2002 OL 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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