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19996 (1990 WZ)
Classification: Main-belt Asteroid          SPK-ID: 2019996
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 .05825015878532126 3.3306e-08  
a 2.790153616669444 1.2756e-08 au
q 2.627626725463011 9.1692e-08 au
i 8.914169896392806 4.5083e-06 deg
node 190.2724797594179 2.3941e-05 deg
peri 246.1965880992821 4.6804e-05 deg
M 143.0529915351303 3.9852e-05 deg
tp 2458524.051025892389
(2019-Feb-09.55102589)
0.00018794 TDB
period 1702.31763813857
4.66
1.1674e-05
3.196e-08
d
yr
n .2114763966104754 1.4502e-09 deg/d
Q 2.952680507875877 1.3499e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1777  
   data-arc span      10785 days (29.53 yr)  
   first obs. used      1990-11-11  
   last obs. used      2020-05-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49477  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:05:23  

Additional Information
 Earth MOID = 1.6562 au 
 Jupiter MOID = 2.21765 au 
 T_jup = 3.309 
[ 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 14.01   n/a E2021B10  
diameter diameter 9.427 km 0.102 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 3.98757 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:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.050   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

19996 (1990 WZ)          Discovered 1990-Nov-18 by Elst, E. W. at La Silla
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1990 WZ = 1997 GT16 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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