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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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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.


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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 
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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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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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