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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 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05825015916285457 3.3286e-08  
a 2.790153617733422 1.2693e-08 au
q 2.627626725411636 9.1664e-08 au
i 8.914170619609393 4.4655e-06 deg
node 190.2724765144204 2.3796e-05 deg
peri 246.1965877415302 4.6237e-05 deg
M 143.0529947278679 3.9353e-05 deg
tp 2458524.051010408090
(2019-Feb-09.55101041)
0.00018552 TDB
period 1702.317639112295
4.66
1.1617e-05
3.181e-08
d
yr
n .211476396489511 1.4431e-09 deg/d
Q 2.952680510055209 1.3433e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1789  
   data-arc span      11056 days (30.27 yr)  
   first obs. used      1990-11-11  
   last obs. used      2021-02-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49435  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:10:59  

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

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