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20462 (1999 LZ31)
Classification: Main-belt Asteroid          SPK-ID: 2020462
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03733337814918428 4.3787e-08  
a 3.012672871855841 1.8785e-08 au
q 2.900199616291057 1.2506e-07 au
i 8.719424805318885 4.5471e-06 deg
node 295.6850002950107 2.5476e-05 deg
peri 243.9479652430429 6.1926e-05 deg
M 147.7269801790801 5.6119e-05 deg
tp 2458416.738887671759
(2018-Oct-25.23888767)
0.00029864 TDB
period 1909.969323789936
5.23
1.7864e-05
4.891e-08
d
yr
n .1884847026158802 1.7629e-09 deg/d
Q 3.125146127420624 1.9487e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2198  
   data-arc span      8749 days (23.95 yr)  
   first obs. used      1997-01-06  
   last obs. used      2020-12-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4598  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:21:44  

Additional Information
 Earth MOID = 1.91769 au 
 Jupiter MOID = 1.9343 au 
 T_jup = 3.230 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.39   n/a E2021B10  
diameter diameter 7.716 km 0.267 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 3.480 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.098   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20462 (1999 LZ31)          Discovered 1999-Jun-14 by Spacewatch at Kitt Peak
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 LZ31 = 2000 RB42 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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