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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2970134254851748 4.659e-08  
a 2.459664074269865 1.216e-08 au
q 1.729110822028151 1.1071e-07 au
i 6.672263204778274 5.0647e-06 deg
node 76.68841169117141 3.8565e-05 deg
peri 96.46133996228913 3.9695e-05 deg
M 55.92592435642736 1.208e-05 deg
tp 2458781.611576227007
(2019-Oct-25.11157623)
4.601e-05 TDB
period 1409.003668067601
3.86
1.0448e-05
2.861e-08
d
yr
n .2554996897160156 1.8946e-09 deg/d
Q 3.190217326511579 1.5771e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1268  
   data-arc span      10266 days (28.11 yr)  
   first obs. used      1991-11-29  
   last obs. used      2020-01-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51144  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-29 07:47:30  

Additional Information
 Earth MOID = .749732 au 
 Jupiter MOID = 1.81355 au 
 T_jup = 3.420 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456733.5 (2014-Mar-17.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2974187121280333 4.6531e-08  
q 1.727424202207834 1.1052e-07 au
tp 2457373.065743840672
(2015-Dec-16.56574384)
3.8275e-05 TDB
node 76.7263213778871 3.8568e-05 deg
peri 96.3690837740905 3.9698e-05 deg
i 6.673169858474026 5.0647e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1268  
   data-arc span      10266 days (28.11 yr)  
   first obs. used      1991-11-29  
   last obs. used      2020-01-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51144  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-29 07:47:30  

Additional Information
 Jupiter MOID = 1.81355 au 
 T_jup = 3.420 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.165129768709608E-15 -5.130497082626869E-15 1.30263171103511E-12 -5.214839579954188E-15 3.420458170172339E-13 -6.134916244308616E-15
q -5.130497082626869E-15 1.221525235243504E-14 -2.986408457595725E-12 8.294517760927528E-15 -7.913956287199729E-13 1.508226805268498E-14
tp 1.30263171103511E-12 -2.986408457595725E-12 1.464961872680712E-9 -1.343251566115928E-11 3.823299817178576E-10 -4.162205825528812E-12
node -5.214839579954188E-15 8.294517760927528E-15 -1.343251566115928E-11 1.487490612614368E-9 -1.480363909902933E-9 -1.18680548466442E-10
peri 3.420458170172339E-13 -7.913956287199729E-13 3.823299817178576E-10 -1.480363909902933E-9 1.575917232079059E-9 1.168374182449508E-10
i -6.134916244308616E-15 1.508226805268498E-14 -4.162205825528812E-12 -1.18680548466442E-10 1.168374182449508E-10 2.565146711543255E-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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