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 ]  
181598 (2006 WQ21)
Classification: Main-belt Asteroid          SPK-ID: 2181598
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ hide orbit diagram ]

For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03007910279167926 3.9342e-08  
a 3.166856828842948 2.8349e-08 au
q 3.07160061676165 1.3352e-07 au
i 9.965993896378295 4.2716e-06 deg
node 91.55504440413399 3.1946e-05 deg
peri 170.6199897333869 9.9844e-05 deg
M 19.94953026153194 9.4135e-05 deg
tp 2459282.430051691393
(2021-Mar-08.93005169)
0.0005383 TDB
period 2058.453550171213
5.64
2.764e-05
7.567e-08
d
yr
n .1748885710683425 2.3483e-09 deg/d
Q 3.262113040924247 2.9201e-08 au
  Orbit Determination Parameters
   # obs. used (total)      360  
   data-arc span      6728 days (18.42 yr)  
   first obs. used      2001-12-24  
   last obs. used      2020-05-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .58928  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 02:38:24  

Additional Information
 Earth MOID = 2.05609 au 
 Jupiter MOID = 1.79601 au 
 T_jup = 3.179 
[ 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 15.34   n/a E2021B55  
diameter diameter 3.904 km 1.540 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.096   0.072 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

181598 (2006 WQ21)          Discovered 2006-Nov-17 by Mt. Lemmon Survey at Mount Lemmon
Reference: 20080321/Numbers.arcLast Updated: 2008-03-26

[ 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
1905-Jan-03 04:33 00:05 Jupiter 1.80404388888006 1.80404325621511 1.80404452155219 2.95461911945877 2.791191078942 2416848.689301138 4.84620149431658 310.226495257435 19.8824572422401 -83.842518766756 2600658.79574104 T 19 CATAB v2.0g-lin.ifort 2021-Jul-09 02:38:25 2021-Jul-09 02:38
1915-Aug-06 06:32 00:04 Jupiter 1.89345105509825 1.89345015677743 1.89345195342628 3.09847412289284 2.95056866212678 2420715.772396610 4.39157547205074 252.696268185318 21.8729527753739 -86.6168284195843 2790092.44286948 T 19 CATAB v2.0g-lin.ifort 2021-Jul-09 02:38:25 2021-Jul-09 02:38
2001-Jun-19 17:07 < 00:01 Jupiter 1.86496060210596 1.86496019656756 1.86496100764446 3.77097025845463 3.64854249923142 2452080.213040251 0.66920237571525 68.6180019846968 16.2049866109523 -83.3648698576757 3652721.56584053 T 19 CATAB v2.0g-lin.ifort 2021-Jul-09 02:38:25 2021-Jul-09 02:38
2012-Feb-24 16:03 < 00:01 Jupiter 1.78848211975775 1.78848162951667 1.78848260999883 3.17509686632651 3.02225793758503 2455982.169014063 0.310098213305515 90.7525723417525 19.7920996391042 -84.736403961022 2818574.28004418 T 19 CATAB v2.0g-lin.ifort 2021-Jul-09 02:38:25 2021-Jul-09 02:38
2022-Oct-03 00:44 < 00:01 Jupiter 1.867163640592 1.86716308666676 1.86716419451725 2.93591677267623 2.77710725906006 2459855.530476457 0.437254492269898 61.2949135291806 19.4708793545366 88.6533669046005 2722823.1859078 T 19 CATAB v2.0g-lin.ifort 2021-Jul-09 02:38:25 2021-Jul-09 02:38
2033-May-16 00:53 < 00:01 Jupiter 1.9988086865587 1.99880813787282 1.99880923524457 3.88469397393391 3.77403231632013 2463733.536819546 0.806593079822681 59.6715923600911 23.7749495351328 -88.2613700072988 3293370.96557908 T 19 CATAB v2.0g-lin.ifort 2021-Jul-09 02:38:25 2021-Jul-09 02:38
2108-Aug-04 14:20 00:04 Jupiter 1.91474540501621 1.9147440590521 1.91474675098838 3.86747981138155 3.75135490951289 2491207.097014639 3.67489368486115 220.19375961803 17.4433957494967 -74.1218467827238 3435457.99692211 T 19 CATAB v2.0g-lin.ifort 2021-Jul-09 02:38:25 2021-Jul-09 02:38
2119-Apr-17 20:53 00:04 Jupiter 1.78677934605628 1.7867788291149 1.78677986299776 3.39491889288213 3.25228758806804 2495115.370028861 4.28539550451734 85.6481768837161 18.8496397836291 -85.5140747948311 1785990.65898741 T 19 CATAB v2.0g-lin.ifort 2021-Jul-09 02:38:25 2021-Jul-09 02:38
2129-Dec-04 19:42 00:05 Jupiter 1.83573622511113 1.8357352103968 1.83573723984862 2.93816913643344 2.7766927847851 2498999.320628413 5.10021661144258 398.886797291107 20.5546258267401 -83.4126534253215 2597981.20356338 T 19 CATAB v2.0g-lin.ifort 2021-Jul-09 02:38:25 2021-Jul-09 02:38
2140-Jul-11 19:24 00:05 Jupiter 1.96789279685406 1.96789147495681 1.96789411876374 3.55431113786926 3.43107643999909 2502871.308659726 5.42678910614152 285.469798866732 23.8729547961705 -81.9418409328648 3103221.80326523 T 19 CATAB v2.0g-lin.ifort 2021-Jul-09 02:38:25 2021-Jul-09 02:38
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Jul-24 07:08 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin