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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2720788450213828 5.9497e-08  
a 1.803216879865403 2.3547e-09 AU
q 1.312599713868563 1.0687e-07 AU
i 8.359027483073474 5.7154e-06 deg
node 252.7806420892665 3.3449e-05 deg
peri 51.28574651919591 3.6926e-05 deg
M 61.03767382074134 9.9202e-06 deg
tp 2456850.543309752054
(2014-Jul-12.04330975)
2.4265e-05 JED
period 884.4440672461551
2.42
1.7324e-06
4.743e-09
d
yr
n .4070353494720274 7.9728e-10 deg/d
Q 2.293834045862244 2.9954e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      555  
   data-arc span      23072 days (63.17 yr)  
   first obs. used      1951-07-31  
   last obs. used      2014-09-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51529  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Oct-09 18:35:23  

Additional Information
 Earth MOID = .321763 AU 
 T_jup = 4.007 
[ 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 16.7 mag n/a MPO302783  
rotation period rot_per 46.07 h n/a Asteroid Lightcurve DataBase (Rev. 2014-Mar-01) 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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