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

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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

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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