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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 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2716767193846482 5.5521e-08  
a 1.803685720845157 2.2445e-09 au
q 1.31366630140501 9.9519e-08 au
i 8.356338054953806 4.5837e-06 deg
node 252.7560493803152 3.0817e-05 deg
peri 51.32465554144617 3.4504e-05 deg
M 223.8166124879683 9.6821e-06 deg
tp 2457735.204352293056
(2016-Dec-12.70435229)
2.4056e-05 JED
period 884.7890262301964
2.42
1.6515e-06
4.522e-09
d
yr
n .4068766557083614 7.5946e-10 deg/d
Q 2.293705140285303 2.8542e-09 au
  Orbit Determination Parameters
   # obs. used (total)      664  
   data-arc span      23511 days (64.37 yr)  
   first obs. used      1951-07-31  
   last obs. used      2015-12-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52409  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 18:25:01  

Additional Information
 Earth MOID = .320037 au 
 Jupiter MOID = 2.95015 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 MPO359876  
rotation period rot_per 46.07 h n/a LCDB (Rev. 2015-December); 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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