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101509 (1998 XN20)
Classification: Main-belt Asteroid          SPK-ID: 2101509
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1239168581053252 5.2262e-08  
a 2.737202095967934 1.8784e-08 au
q 2.398016612236277 1.4454e-07 au
i 6.661071364438595 5.0331e-06 deg
node 279.9258672527427 4.7405e-05 deg
peri 259.1477764741339 5.2011e-05 deg
M 206.9647478790542 2.5586e-05 deg
tp 2459703.649553423836
(2022-May-04.14955342)
0.00012113 TDB
period 1654.088425538229
4.53
1.7027e-05
4.662e-08
d
yr
n .2176425361799255 2.2404e-09 deg/d
Q 3.076387579699591 2.1112e-08 au
  Orbit Determination Parameters
   # obs. used (total)      288  
   data-arc span      8012 days (21.94 yr)  
   first obs. used      1998-12-10  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57323  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-17 22:29:21  

Additional Information
 Earth MOID = 1.41276 au 
 Jupiter MOID = 1.95803 au 
 T_jup = 3.331 
[ 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 15.9   n/a MPO449615  
diameter diameter 3.729 km 0.951 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.055   0.028 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

101509 (1998 XN20)          Discovered 1998-Dec-10 by Spacewatch at Kitt Peak
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 1998 XN20 = 2004 FC14 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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