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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09039992052749837 3.4704e-08  
a 2.452323079841503 1.0429e-08 au
q 2.230633268316081 8.2997e-08 au
i 11.172141279763 3.8746e-06 deg
node 281.7015607811047 2.3669e-05 deg
peri 198.6832152432005 3.702e-05 deg
M 144.7082525460943 2.9197e-05 deg
tp 2458636.660167383085
(2019-Jun-02.16016738)		 0.00011254 TDB
period 1402.70051065286
3.84		 8.9476e-06
2.45e-08		 d
yr
n .2566477999159242 1.6371e-09 deg/d
Q 2.674012891366925 1.1371e-08 au
   Orbit Determination Parameters
   # obs. used (total)      1727  
   data-arc span      12015 days (32.90 yr)  
   first obs. used      1987-09-22  
   last obs. used      2020-08-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45306  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 01:29:01  

Additional Information
 Earth MOID = 1.24946 au 
 Jupiter MOID = 2.43695 au 
 T_jup = 3.463 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457068.5 (2015-Feb-15.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09083468694856434 3.4817e-08  
q 2.228866979590165 8.3346e-08 au
tp 2457236.408782289658
(2015-Aug-01.90878229)		 0.00010915 TDB
node 281.7572458636874 2.3659e-05 deg
peri 199.1348312734752 3.6823e-05 deg
i 11.1761868744573 3.8756e-06 deg
   Orbit Determination Parameters
   # obs. used (total)      1727  
   data-arc span      12015 days (32.90 yr)  
   first obs. used      1987-09-22  
   last obs. used      2020-08-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45306  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 01:29:01  

Additional Information
 Jupiter MOID = 2.43695 au 
 T_jup = 3.463 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.212241595458314E-15 -2.884269937176784E-15 3.978427595926652E-13 -8.498214338767165E-15 8.378248062401366E-14 -1.130027347299567E-15
q -2.884269937176784E-15 6.946622452815327E-15 -7.449174689199873E-13 2.071180470574066E-14 -1.497582644571037E-13 2.738746143710497E-15
tp 3.978427595926652E-13 -7.449174689199873E-13 1.191271748818256E-8 -1.073686623988954E-12 3.103391050730384E-9 -1.269979643050609E-11
node -8.498214338767165E-15 2.071180470574066E-14 -1.073686623988954E-12 5.597430681246562E-10 -5.487675031063572E-10 -9.440471769727688E-12
peri 8.378248062401366E-14 -1.497582644571037E-13 3.103391050730384E-9 -5.487675031063572E-10 1.355952280623256E-9 5.959204767236472E-12
i -1.130027347299567E-15 2.738746143710497E-15 -1.269979643050609E-11 -9.440471769727688E-12 5.959204767236472E-12 1.502033058486809E-11

[ 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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