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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05818525117450698 3.3021e-08  
a 2.790226849594093 1.2161e-08 au
q 2.627876799516608 9.1294e-08 au
i 8.914164796150297 4.0058e-06 deg
node 190.2716085880891 2.3237e-05 deg
peri 246.0680851118734 4.226e-05 deg
M 184.6479367303182 3.5984e-05 deg
tp 2460225.712951429348
(2023-Oct-08.21295143)
0.00017183 TDB
period 1702.384659457717
4.66
1.1129e-05
3.047e-08
d
yr
n .2114680709791379 1.3825e-09 deg/d
Q 2.952576899671579 1.2868e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1895  
   data-arc span      11189 days (30.63 yr)  
   first obs. used      1990-11-11  
   last obs. used      2021-06-30  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48597  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 18:17:56  

Additional Information
 Earth MOID = 1.65667 au 
 Jupiter MOID = 2.21729 au 
 T_jup = 3.309 
[ 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 14.01   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

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