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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1237908994344231 4.8188e-08  
a 2.737771910366319 1.8328e-08 au
q 2.398860663135774 1.3499e-07 au
i 6.660910271599557 4.7708e-06 deg
node 279.9285214096567 4.4229e-05 deg
peri 259.0592643216035 4.9175e-05 deg
M 250.5789511746924 2.5808e-05 deg
tp 2459703.412805815025
(2022-May-03.91280582)		 0.00012117 TDB
period 1654.604959804908
4.53		 1.6616e-05
4.549e-08		 d
yr
n .2175745925737144 2.1849e-09 deg/d
Q 3.076683157596865 2.0597e-08 au
   Orbit Determination Parameters
   # obs. used (total)      316  
   data-arc span      8068 days (22.09 yr)  
   first obs. used      1998-12-10  
   last obs. used      2021-01-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5649  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 08:28:52  

Additional Information
 Earth MOID = 1.41318 au 
 Jupiter MOID = 1.9568 au 
 T_jup = 3.330 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457561.5 (2016-Jun-22.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1229990557297608 4.8415e-08  
q 2.401383404896025 1.3542e-07 au
tp 2458051.510322458419
(2017-Oct-25.01032246)		 0.00011369 TDB
node 279.9839117724637 4.4294e-05 deg
peri 259.6098429316219 4.9261e-05 deg
i 6.654710564482062 4.7673e-06 deg
   Orbit Determination Parameters
   # obs. used (total)      316  
   data-arc span      8068 days (22.09 yr)  
   first obs. used      1998-12-10  
   last obs. used      2021-01-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5649  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 08:28:52  

Additional Information
 Jupiter MOID = 1.9568 au 
 T_jup = 3.330 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.344059823753127E-15 -6.510816589542364E-15 -8.396200536846936E-14 -7.188665513810081E-15 -2.599293749462894E-14 2.114709467988047E-15
q -6.510816589542364E-15 1.833972917344059E-14 9.600542987982092E-13 2.598862526533086E-14 1.90706444934089E-13 -5.236782720412513E-15
tp -8.396200536846936E-14 9.600542987982092E-13 1.292605629139568E-8 4.805620815912857E-11 2.483954128832194E-9 1.17696798690968E-12
node -7.188665513810081E-15 2.598862526533086E-14 4.805620815912857E-11 1.961960758406019E-9 -1.939314953489789E-9 2.032831715680712E-11
peri -2.599293749462894E-14 1.90706444934089E-13 2.483954128832194E-9 -1.939314953489789E-9 2.426659609875156E-9 -2.001715121156611E-11
i 2.114709467988047E-15 -5.236782720412513E-15 1.17696798690968E-12 2.032831715680712E-11 -2.001715121156611E-11 2.272750098817833E-11

[ 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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)		 Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1915-Nov-07 16:28 00:03 Jupiter 1.95464546249324 1.95464500751426 1.95464591747244 2.26238973413636 2.06197258477901 2420809.186068201 3.06588157060622 230.825937529386 17.235617513417 86.3237593980133 2436862.47123157 T 15 CATAB v2.0f-lin.ifort 2021-Feb-24 08:28:52 2021-Feb-24 08:28
2011-Apr-03 05:44 < 00:01 Jupiter 1.9650871016363 1.96508663962941 1.96508756364309 2.29949258721351 2.10370980423365 2455654.738725382 0.244210299456797 45.2029477999243 11.4228036806567 -77.8038557316746 2431878.4786599 T 15 CATAB v2.0f-lin.ifort 2021-Feb-24 08:28:52 2021-Feb-24 08:28
2069-Oct-22 02:18 00:02 Jupiter 1.96410862262043 1.96410813833807 1.96410910690368 2.36515363405948 2.1751898832321 2477041.595843222 1.61271607893463 144.473498328452 16.0255957657464 88.440444980917 2535303.58515748 T 15 CATAB v2.0f-lin.ifort 2021-Feb-24 08:28:52 2021-Feb-24 08:28
2165-Mar-18 19:33 00:05 Jupiter 1.95706518642972 1.95706472608589 1.95706564677331 2.22166328188168 2.01746943762728 2511887.314426895 4.5227595616051 238.72412054628 13.3509747980861 -87.8500931846621 2350365.8676732 T 15 CATAB v2.0f-lin.ifort 2021-Feb-24 08:28:52 2021-Feb-24 08:28

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