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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 ]

[ show orbit diagram ]
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 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457109.5 (2015-Mar-28.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05774369111076558 3.3242e-08  
q 2.631957893595954 9.1626e-08 au
tp 2456830.167840162456
(2014-Jun-21.66784016)
0.00018648 TDB
node 190.3077283183477 2.3824e-05 deg
peri 248.3210109471981 4.6518e-05 deg
i 8.905279128354644 4.4623e-06 deg
  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
 Jupiter MOID = 2.21765 au 
 T_jup = 3.309 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.105054739889367E-15 -3.020376708458817E-15 -2.943933014927467E-13 3.948805685690051E-15 -8.423668186697062E-14 -7.702413944790311E-16
q -3.020376708458817E-15 8.395294033185844E-15 8.282964469398974E-13 -1.214712330587529E-14 2.401329011186704E-13 2.156167970696316E-15
tp -2.943933014927467E-13 8.282964469398974E-13 3.477377337014668E-8 -3.317264831701771E-11 7.463194009432765E-9 -4.882019232208626E-12
node 3.948805685690051E-15 -1.214712330587529E-14 -3.317264831701771E-11 5.675734021265494E-10 -5.675992637257518E-10 -1.131799919009303E-11
peri -8.423668186697062E-14 2.401329011186704E-13 7.463194009432765E-9 -5.675992637257518E-10 2.163936377163362E-9 1.020019262234172E-11
i -7.702413944790311E-16 2.156167970696316E-15 -4.882019232208626E-12 -1.131799919009303E-11 1.020019262234172E-11 1.991218773800207E-11

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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