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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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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1237909017860954 4.8159e-08  
a 2.737771908007378 1.8324e-08 au
q 2.398860654630505 1.349e-07 au
i 6.660910604822152 4.7679e-06 deg
node 279.9285169509842 4.4168e-05 deg
peri 259.0592689297184 4.9117e-05 deg
M 250.5789512849153 2.5804e-05 deg
tp 2459703.412804658441
(2022-May-03.91280466)
0.00012115 TDB
period 1654.604957666427
4.53
1.6611e-05
4.548e-08
d
yr
n .217574592854917 2.1843e-09 deg/d
Q 3.07668316138425 2.0592e-08 au
  Orbit Determination Parameters
   # obs. used (total)      319  
   data-arc span      8068 days (22.09 yr)  
   first obs. used      1998-12-10  
   last obs. used      2021-01-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .56953  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:37:06  

Additional Information
 Earth MOID = 1.41318 au 
 Jupiter MOID = 1.9568 au 
 T_jup = 3.330 
[ 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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