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 ]  
49371 (1998 WZ21)
Classification: Main-belt Asteroid          SPK-ID: 2049371
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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .01919357319344224 3.7369e-08  
a 2.655781325660866 1.0828e-08 au
q 2.604807392401017 1.0065e-07 au
i 1.000105784448401 4.0361e-06 deg
node 162.6663978004588 0.0002085 deg
peri 229.3110417338815 0.00023112 deg
M 58.99101541825517 9.8241e-05 deg
tp 2458941.457950738767
(2020-Apr-01.95795074)
0.00043152 TDB
period 1580.836286218346
4.33
9.6676e-06
2.647e-08
d
yr
n .2277275661866206 1.3927e-09 deg/d
Q 2.706755258920714 1.1035e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1462  
   data-arc span      10019 days (27.43 yr)  
   first obs. used      1993-08-15  
   last obs. used      2021-01-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46006  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 05:00:44  

Additional Information
 Earth MOID = 1.60694 au 
 Jupiter MOID = 2.34603 au 
 T_jup = 3.388 
[ 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 14.5   n/a MPO347861  
diameter diameter 3.304 km 0.599 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.281   0.124 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

49371 (1998 WZ21)          Discovered 1998-Nov-18 by LINEAR at Socorro
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1979-Nov-14 14:44 00:01 Iris 0.00546765084437834 0.00546597396200142 0.00546933007501275 3.69784390286122 3.69784361853055 2444192.114091701 1.46737858131922 234.109354777629 48.2658212752328 -72.6567074531532 16197.5168029188 T 26 CATAB v2.0f-lin.ifort 2021-Feb-24 05:00:47 2021-Feb-24 05:00
2172-Jul-14 09:56 00:03 David 0.0471584094294316 0.0471326228748658 0.047184200859635 5.3878801501396 5.38788009068219 2514561.913560043 2.66146091606374 1491.1596402828 22.2720956145909 -30.4620348824555 160552.223078705 T 26 CATAB v2.0f-lin.ifort 2021-Feb-24 05:00:47 2021-Feb-24 05:00
2179-Sep-29 20:26 00:24 Psych 0.0329831613068723 0.0329617606990465 0.0330045720241157 1.5968687610336 1.59686853131736 2517195.351235613 23.5989607707229 1392.19830732683 41.0133968120531 40.465102933641 77686.7071463805 T 26 CATAB v2.0f-lin.ifort 2021-Feb-24 05:00:47 2021-Feb-24 05:00

Alternate Designations
 1998 WZ21 = 1993 PP8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Mar-03 11:56 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin