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66643 (1999 RW229)
Classification: Main-belt Asteroid          SPK-ID: 2066643
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1491302551870131 6.4995e-08  
a 2.533795771923802 1.096e-08 au
q 2.155930161865031 1.6537e-07 au
i 7.375933942323152 5.3485e-06 deg
node 106.3330075233279 3.151e-05 deg
peri 210.0767823898981 3.3908e-05 deg
M 112.7802587718092 1.1462e-05 deg
tp 2458738.984359602125
(2019-Sep-12.48435960)
4.6275e-05 TDB
period 1473.180079143115
4.03
9.5582e-06
2.617e-08
d
yr
n .2443693103760922 1.5855e-09 deg/d
Q 2.911661381982574 1.2594e-08 au
  Orbit Determination Parameters
   # obs. used (total)      954  
   data-arc span      8333 days (22.81 yr)  
   first obs. used      1998-04-20  
   last obs. used      2021-02-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49492  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 12:23:57  

Additional Information
 Earth MOID = 1.14361 au 
 Jupiter MOID = 2.36196 au 
 T_jup = 3.422 
[ 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 14.92   n/a E2021B10  
diameter diameter 6.604 km 2.023 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  
geometric albedo albedo 0.040   0.034 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  

66643 (1999 RW229)          Discovered 1999-Sep-08 by CSS at Catalina
Reference: 20030910/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 RW229 = 2000 YQ40 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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