Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05821054880296902 3.3299e-08  
a 2.79061889808696 1.2793e-08 au
q 2.628175440529382 9.1701e-08 au
i 8.913428893134256 4.5079e-06 deg
node 190.2719403729689 2.3943e-05 deg
peri 246.3734668434352 4.6826e-05 deg
M 100.5786414808406 3.984e-05 deg
tp 2458524.778819599730
(2019-Feb-10.27881960)
0.0001881 TDB
period 1702.743469414636
4.66
1.1709e-05
3.206e-08
d
yr
n .2114235094519316 1.4539e-09 deg/d
Q 2.953062355644539 1.3538e-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 = 1.6574 au 
 Jupiter MOID = 2.21757 au 
 T_jup = 3.309 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457062.5 (2015-Feb-09.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05762768307724214 3.3276e-08  
q 2.632187877378962 9.1634e-08 au
tp 2456830.312982999797
(2014-Jun-21.81298300)
0.00018934 TDB
node 190.3192869507073 2.3976e-05 deg
peri 248.3507891403801 4.7147e-05 deg
i 8.903885730010538 4.5046e-06 deg
  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
 Jupiter MOID = 2.21757 au 
 T_jup = 3.309 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.107288430304626E-15 -3.023445263403548E-15 -2.888027243771982E-13 3.971870873993636E-15 -8.323047940466773E-14 -7.115048714971746E-16
q -3.023445263403548E-15 8.396767620538611E-15 7.781788202939462E-13 -1.179961940141808E-14 2.293839396421462E-13 1.961935022209094E-15
tp -2.888027243771982E-13 7.781788202939462E-13 3.58495765183312E-8 -3.371032136773657E-11 7.699101163699572E-9 -5.206778411085708E-12
node 3.971870873993636E-15 -1.179961940141808E-14 -3.371032136773657E-11 5.748468679440401E-10 -5.749141412691637E-10 -1.292942350471252E-11
peri -8.323047940466773E-14 2.293839396421462E-13 7.699101163699572E-9 -5.749141412691637E-10 2.222856232520477E-9 1.171882704220876E-11
i -7.115048714971746E-16 1.961935022209094E-15 -5.206778411085708E-12 -1.292942350471252E-11 1.171882704220876E-11 2.029098608248561E-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 14.0   n/a MPO467936  
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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Jan-26 15:28 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin