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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 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2720788339277199 5.7433e-08  
a 1.803216879979902 2.3028e-09 AU
q 1.312599733956189 1.0303e-07 AU
i 8.359031916524161 5.0829e-06 deg
node 252.7806639287056 3.1618e-05 deg
peri 51.28572545184142 3.5393e-05 deg
M 61.03767325983876 9.8578e-06 deg
tp 2456850.543311115790
(2014-Jul-12.04331112)
2.4118e-05 JED
period 884.4440673303941
2.42
1.6942e-06
4.638e-09
d
yr
n .4070353494332593 7.7969e-10 deg/d
Q 2.293834026003614 2.9293e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      641  
   data-arc span      23189 days (63.49 yr)  
   first obs. used      1951-07-31  
   last obs. used      2015-01-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .50038  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Mar-09 20:51:12  

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 MPO320748  
rotation period rot_per 46.07 h n/a LCDB (Rev. 2015-Feb); Warner et al., 2009 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
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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