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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 6 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2721638654553981 6.5906e-08  
a 1.803432547649281 2.8673e-09 AU
q 1.312603374392976 1.1892e-07 AU
i 8.359088569338706 7.4253e-06 deg
node 252.7864103686316 3.5693e-05 deg
peri 51.28300172040078 3.8903e-05 deg
M 339.6318298690756 1.1212e-05 deg
tp 2456850.549275493935
(2014-Jul-12.04927549)
2.7612e-05 JED
period 884.602743496376
2.42
2.1097e-06
5.776e-09
d
yr
n .4069623372149024 9.7055e-10 deg/d
Q 2.294261720905585 3.6477e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      515  
   data-arc span      22984 days (62.93 yr)  
   first obs. used      1951-07-31  
   last obs. used      2014-07-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52266  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jul-14 15:51:19  

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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