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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2009199621190587 5.3609e-08  
a 2.979932330072386 1.9445e-08 au
q 2.381204439196884 1.5897e-07 au
i 2.984637062191847 5.2539e-06 deg
node 75.60098301454401 0.00012379 deg
peri 22.91012086457226 0.00012472 deg
M 37.67492562176828 1.4116e-05 deg
tp 2458803.866308420319
(2019-Nov-16.36630842)
7.3411e-05 TDB
period 1878.91887775312
5.14
1.8391e-05
5.035e-08
d
yr
n .1915995438986175 1.8754e-09 deg/d
Q 3.578660220947888 2.3352e-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.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59688  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 18:00:12  

Additional Information
 Earth MOID = 1.39841 au 
 Jupiter MOID = 1.60299 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 16.3   n/a MPO417512  
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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