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101472 (1998 WL18)
Classification: Main-belt Asteroid          SPK-ID: 2101472
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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2432906232979706 3.8975e-08  
a 2.386271476056103 6.7478e-09 au
q 1.805714001288245 9.2157e-08 au
i 6.264597929109964 4.6011e-06 deg
node 30.43672368364352 2.9844e-05 deg
peri 343.8743527610281 3.1056e-05 deg
M 25.18171598281902 6.6883e-06 deg
tp 2459106.319493346413
(2020-Sep-13.81949335)
2.5016e-05 TDB
period 1346.412707474895
3.69
5.711e-06
1.564e-08
d
yr
n .2673771556086658 1.1341e-09 deg/d
Q 2.96682895082396 8.3895e-09 au
  Orbit Determination Parameters
   # obs. used (total)      950  
   data-arc span      8118 days (22.23 yr)  
   first obs. used      1998-11-17  
   last obs. used      2021-02-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47111  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:36:57  

Additional Information
 Earth MOID = .806493 au 
 Jupiter MOID = 2.4973 au 
 T_jup = 3.486 
[ 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 16.06   n/a E2021B55  
diameter diameter 3.624 km 0.035 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.053   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

101472 (1998 WL18)          Discovered 1998-Nov-21 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

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