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52439 (1994 QL)
Classification: Mars-crossing Asteroid          SPK-ID: 2052439
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1428637928519044 3.5987e-08  
a 1.926425679476303 7.2513e-09 au
q 1.651209200259011 6.8968e-08 au
i 26.55669481829494 5.313e-06 deg
node 45.78933302778555 8.2251e-06 deg
peri 287.3023576037061 2.5602e-05 deg
M 300.504085091167 2.9827e-05 deg
tp 2459361.902947587875
(2021-May-27.40294759)
8.1434e-05 TDB
period 976.6227012505082
2.67
5.5142e-06
1.51e-08
d
yr
n .3686172761897108 2.0813e-09 deg/d
Q 2.201642158693594 8.2873e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2189  
   data-arc span      9443 days (25.85 yr)  
   first obs. used      1994-08-16  
   last obs. used      2020-06-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .37465  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 10:45:25  

Additional Information
 Earth MOID = .765627 au 
 Jupiter MOID = 3.16912 au 
 T_jup = 3.778 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.95   n/a E2021B10  
rotation period rot_per 44.8454 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 sidereal period (not synodic); Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]

52439 (1994 QL)          Discovered 1994-Aug-16 by McNaught, R. H. at Siding Spring
Reference: 20030216/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1994 QL = 1999 JW4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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