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26428 (1999 XR169)
Classification: Main-belt Asteroid          SPK-ID: 2026428
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09039990051070124 6.0136e-09  
a 2.452323080848616 9.9028e-09 au
q 2.230633318319804 1.1171e-08 au
i 11.17214501189314 2.9462e-07 deg
node 281.7015546772619 2.9375e-06 deg
peri 198.68322622654 1.0514e-05 deg
M 144.7082473133743 9.5589e-06 deg
tp 2458636.660187424470
(2019-Jun-02.16018742)
3.6197e-05 TDB
period 1402.700511516946
3.84
8.4964e-06
2.326e-08
d
yr
n .2566477997578251 1.5546e-09 deg/d
Q 2.674012843377427 1.0798e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1769  
   data-arc span      12015 days (32.90 yr)  
   first obs. used      1987-09-22  
   last obs. used      2020-08-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45336  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 05:18:47  

Additional Information
 Earth MOID = 1.24946 au 
 Jupiter MOID = 2.43695 au 
 T_jup = 3.463 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457103.5 (2015-Mar-22.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09085979081809505 6.044e-09  
q 2.228852277169957 1.1353e-08 au
tp 2457236.406494301770
(2015-Aug-01.90649430)
3.4644e-05 TDB
node 281.7574239004368 2.937e-06 deg
peri 199.1347327063642 1.0424e-05 deg
i 11.17611826204601 2.947e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      1769  
   data-arc span      12015 days (32.90 yr)  
   first obs. used      1987-09-22  
   last obs. used      2020-08-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45336  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 05:18:47  

Additional Information
 Jupiter MOID = 2.43695 au 
 T_jup = 3.463 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.653017923177152E-17 -5.420380825759515E-17 5.879075266985624E-14 -6.85542016288321E-15 2.212859584936072E-14 -5.219245465884569E-16
q -5.420380825759515E-17 1.288991502976989E-16 -1.389006734635082E-13 1.596538321214438E-14 -5.220453443233414E-14 1.400012592177566E-15
tp 5.879075266985624E-14 -1.389006734635082E-13 1.200192383981698E-9 -2.502145481618196E-11 3.488185475313474E-10 1.276563502404425E-12
node -6.85542016288321E-15 1.596538321214438E-14 -2.502145481618196E-11 8.625969878530952E-12 -1.487785442349787E-11 -1.530431035739761E-13
peri 2.212859584936072E-14 -5.220453443233414E-14 3.488185475313474E-10 -1.487785442349787E-11 1.086576475028436E-10 5.359315452505454E-13
i -5.219245465884569E-16 1.400012592177566E-15 1.276563502404425E-12 -1.530431035739761E-13 5.359315452505454E-13 8.684974883252833E-14

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.92   n/a E2021B10  
diameter diameter 7.010 km 0.145 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.207   0.028 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

26428 (1999 XR169)          Discovered 1999-Dec-10 by LINEAR at Socorro
Reference: 20010705/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 XR169 = 1987 SB14 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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