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49858 (1999 XZ99)
Classification: Main-belt Asteroid          SPK-ID: 2049858
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbit Diagram
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Note: This Java-based orbit viewer will eventually be retired.

Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet 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. For accurate long-term ephemerides, please instead use our Horizons system.

Note: If the applet is not working, here are some notes that might help.
Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .297013425494024 4.659e-08  
a 2.459664074540432 1.2147e-08 au
q 1.72911082219659 1.1071e-07 au
i 6.672263178283486 5.0645e-06 deg
node 76.68841140682018 3.8562e-05 deg
peri 96.46134031841486 3.9693e-05 deg
M 55.92592416597081 1.2072e-05 deg
tp 2458781.611576936318
(2019-Oct-25.11157694)
4.5982e-05 TDB
period 1409.00366830009
3.86
1.0438e-05
2.858e-08
d
yr
n .2554996896738576 1.8927e-09 deg/d
Q 3.190217326884274 1.5755e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1272  
   data-arc span      10284 days (28.16 yr)  
   first obs. used      1991-11-29  
   last obs. used      2020-01-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51103  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 09:35:48  

Additional Information
 Earth MOID = .749732 au 
 Jupiter MOID = 1.81355 au 
 T_jup = 3.420 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456735.5 (2014-Mar-19.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2974201674304393 4.6531e-08  
q 1.727418539804797 1.1052e-07 au
tp 2457373.065115219826
(2015-Dec-16.56511522)
3.8258e-05 TDB
node 76.72625792424547 3.8565e-05 deg
peri 96.369250008446 3.9695e-05 deg
i 6.673171923794555 5.0645e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1272  
   data-arc span      10284 days (28.16 yr)  
   first obs. used      1991-11-29  
   last obs. used      2020-01-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51103  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 09:35:48  

Additional Information
 Jupiter MOID = 1.81355 au 
 T_jup = 3.420 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.165130396572727E-15 -5.130519313637056E-15 1.302537748827105E-12 -5.232466175958631E-15 3.42048292597369E-13 -6.137337686146128E-15
q -5.130519313637056E-15 1.221520600246294E-14 -2.986616954003711E-12 8.343451536664268E-15 -7.914752422835181E-13 1.508662925267815E-14
tp 1.302537748827105E-12 -2.986616954003711E-12 1.463652493600311E-9 -1.342002105159732E-11 3.82111392551268E-10 -4.167803933783584E-12
node -5.232466175958631E-15 8.343451536664268E-15 -1.342002105159732E-11 1.487296809929082E-9 -1.480171091423854E-9 -1.187008946495366E-10
peri 3.42048292597369E-13 -7.914752422835181E-13 3.82111392551268E-10 -1.480171091423854E-9 1.575692819132428E-9 1.168565624558313E-10
i -6.137337686146128E-15 1.508662925267815E-14 -4.167803933783584E-12 -1.187008946495366E-10 1.168565624558313E-10 2.564943755468712E-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 14.8   n/a MPO319678  
diameter diameter 4.339 km 1.054 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2017AJ....154..168M)  
geometric albedo albedo 0.106   0.065 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2017AJ....154..168M)  

49858 (1999 XZ99)          Discovered 1999-Dec-07 by LINEAR at Socorro
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

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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
1975-Sep-19 04:15 00:01 Jupiter 1.9305143764528 1.93051329038013 1.93051546258671 1.14766217548116 0.663037555466489 2442674.676978154 1.10166036318287 1783.77836614785 622.821689725103 21.8759756310303 744037.831435979 T 24 CATAB v2.0f-lin.ifort 2020-Feb-23 09:35:59 2020-Feb-23 09:36
1987-Feb-06 03:58 < 00:01 Jupiter 1.82559643892782 1.82559588018655 1.82559699766936 0.622458314098724 n/a 2446832.665595490 0.727680613072077 613.873882319923 27.8173268924607 89.8523581252447 9815203.89136324 F 24 CATAB v2.0f-lin.ifort 2020-Feb-23 09:35:59 2020-Feb-23 09:36
1998-Jul-02 20:06 < 00:01 Jupiter 1.84127694116798 1.84127662285454 1.84127725948178 0.420871987976166 n/a 2450997.337231803 0.42579145932421 67.0630938549703 12.5039366501702 -81.4657055011269 21788020.519913 F 24 CATAB v2.0f-lin.ifort 2020-Feb-23 09:35:59 2020-Feb-23 09:36
2009-Nov-18 23:43 < 00:01 Jupiter 1.9694053726979 1.96940503181528 1.96940571358057 0.804835170059197 n/a 2455154.488263734 0.205729038576602 46.4311770722995 15.5475442838826 -80.9633834475248 18736256.6593421 F 24 CATAB v2.0f-lin.ifort 2020-Feb-23 09:35:59 2020-Feb-23 09:36
2118-Apr-07 21:31 00:02 Jupiter 1.96940297003805 1.96940201325445 1.96940392683285 1.40609061437421 1.05683905702387 2494740.396638645 1.63962923695191 442.808536858551 330.775077626027 60.7384893848886 742018.565796078 T 24 CATAB v2.0f-lin.ifort 2020-Feb-23 09:35:59 2020-Feb-23 09:36
2129-Aug-23 18:29 00:02 Jupiter 1.83350765212863 1.83350715769954 1.83350814655809 0.827171373396045 n/a 2498896.270070105 1.76326599956888 983.841142777835 24.634164615132 -89.9406978106968 11131572.6808341 F 24 CATAB v2.0f-lin.ifort 2020-Feb-23 09:35:59 2020-Feb-23 09:36
2141-Jan-17 09:20 00:02 Jupiter 1.81865739358314 1.81865676297486 1.81865802423052 0.507209561493755 n/a 2503060.888870647 1.99822691121704 614.070670017944 22.8893357123275 87.9862094179554 11875739.0494695 F 24 CATAB v2.0f-lin.ifort 2020-Feb-23 09:35:59 2020-Feb-23 09:36
2152-Jun-08 02:09 00:02 Jupiter 1.9241718135745 1.92417031641288 1.92417331073804 0.626391845170494 n/a 2507220.589838679 2.36971152302897 128.682310993251 30.0393544269014 56.8916298210471 8116777.08099524 F 24 CATAB v2.0f-lin.ifort 2020-Feb-23 09:35:59 2020-Feb-23 09:36
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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