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JPL Small-Body Database Browser
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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 
[ 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 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

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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