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101508 (1998 XB20)
Classification: Main-belt Asteroid          SPK-ID: 2101508
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 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2008783169143799 5.3591e-08  
a 2.97926760266025 1.9459e-08 au
q 2.380797341000319 1.5889e-07 au
i 2.984684483153658 5.2538e-06 deg
node 75.59675877592673 0.0001238 deg
peri 22.85349533042464 0.00012473 deg
M 76.05825746060128 1.4188e-05 deg
tp 2458803.668107330478
(2019-Nov-16.16810733)
7.3441e-05 TDB
period 1878.290222925897
5.14
1.8402e-05
5.038e-08
d
yr
n .1916636713570344 1.8777e-09 deg/d
Q 3.577737864320181 2.3368e-08 au
  Orbit Determination Parameters
   # obs. used (total)      446  
   data-arc span      7850 days (21.49 yr)  
   first obs. used      1998-10-23  
   last obs. used      2020-04-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .59694  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:37:06  

Additional Information
 Earth MOID = 1.39779 au 
 Jupiter MOID = 1.60415 au 
 T_jup = 3.227 
[ 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 16.35   n/a E2021B55  
diameter diameter 2.659 km 0.560 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.075   0.046 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

101508 (1998 XB20)          Discovered 1998-Dec-10 by Spacewatch at Kitt Peak
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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