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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 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .297013425572898 4.6218e-08  
a 2.459664075223269 1.199e-08 au
q 1.729110822482612 1.0965e-07 au
i 6.672262465620921 5.0123e-06 deg
node 76.68842075878426 3.7847e-05 deg
peri 96.46133134608067 3.8992e-05 deg
M 55.92592351602121 1.2007e-05 deg
tp 2458781.611579389005
(2019-Oct-25.11157939)
4.5744e-05 TDB
period 1409.003668886829
3.86
1.0302e-05
2.821e-08
d
yr
n .2554996895674622 1.8681e-09 deg/d
Q 3.190217327963927 1.5551e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1299  
   data-arc span      10464 days (28.65 yr)  
   first obs. used      1991-11-29  
   last obs. used      2020-07-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50788  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 23:30:29  

Additional Information
 Earth MOID = .749732 au 
 Jupiter MOID = 1.81355 au 
 T_jup = 3.420 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456786.5 (2014-May-09.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2974517788461147 4.6163e-08  
q 1.727296891666329 1.0946e-07 au
tp 2457373.048149974809
(2015-Dec-16.54814998)
3.8097e-05 TDB
node 76.72496135964869 3.7851e-05 deg
peri 96.37227321377188 3.8995e-05 deg
i 6.673225021173544 5.0124e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1299  
   data-arc span      10464 days (28.65 yr)  
   first obs. used      1991-11-29  
   last obs. used      2020-07-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50788  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 23:30:29  

Additional Information
 Jupiter MOID = 1.81355 au 
 T_jup = 3.420 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.131000861221553E-15 -5.041578190725618E-15 1.296141968969903E-12 -5.405899386814986E-15 3.374874740135813E-13 -6.082236593921094E-15
q -5.041578190725618E-15 1.198219086537209E-14 -2.973657328138911E-12 9.092398068378931E-15 -7.804572793226596E-13 1.488546410893736E-14
tp 1.296141968969903E-12 -2.973657328138911E-12 1.451383661843178E-9 -1.254229152153722E-11 3.786440532737453E-10 -4.316314503669056E-12
node -5.405899386814986E-15 9.092398068378931E-15 -1.254229152153722E-11 1.432676000546859E-9 -1.425763069123322E-9 -1.138162984935974E-10
peri 3.374874740135813E-13 -7.804572793226596E-13 3.786440532737453E-10 -1.425763069123322E-9 1.520577416158723E-9 1.119856034293882E-10
i -6.082236593921094E-15 1.488546410893736E-14 -4.316314503669056E-12 -1.138162984935974E-10 1.119856034293882E-10 2.512437645074681E-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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