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192891 (1999 XK117)
Classification: Main-belt Asteroid          SPK-ID: 2192891
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3146235104884028 3.832e-08  
a 2.629210576140334 8.3196e-09 au
q 1.801999114861826 1.03e-07 au
i 4.212715937735725 4.4023e-06 deg
node 313.2659393834481 5.3294e-05 deg
peri 75.38415821092715 5.4017e-05 deg
M 353.7223949613588 6.462e-06 deg
tp 2459227.653634640900
(2021-Jan-13.15363464)
2.799e-05 TDB
period 1557.171630032941
4.26
7.391e-06
2.024e-08
d
yr
n .2311883886507644 1.0973e-09 deg/d
Q 3.456422037418841 1.0937e-08 au
  Orbit Determination Parameters
   # obs. used (total)      821  
   data-arc span      7753 days (21.23 yr)  
   first obs. used      1999-10-05  
   last obs. used      2020-12-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4647  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 22:17:58  

Additional Information
 Earth MOID = .811325 au 
 Jupiter MOID = 2.03507 au 
 T_jup = 3.325 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457790.5 (2017-Feb-06.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3179833521049051 3.8457e-08  
q 1.791482561260433 1.0363e-07 au
tp 2457670.847544541537
(2016-Oct-09.34754454)
2.5768e-05 TDB
node 313.4842199459599 5.3443e-05 deg
peri 75.17068234675504 5.4127e-05 deg
i 4.21005598960437 4.4018e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      821  
   data-arc span      7753 days (21.23 yr)  
   first obs. used      1999-10-05  
   last obs. used      2020-12-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4647  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 22:17:58  

Additional Information
 Jupiter MOID = 2.03507 au 
 T_jup = 3.325 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.478944344442943E-15 -3.980377937992205E-15 -1.401651505579669E-13 5.816083090205077E-15 1.502396374501419E-14 -4.160090666249016E-15
q -3.980377937992205E-15 1.07400774802643E-14 3.697872739257334E-13 -1.494051823835395E-14 -4.2619129344461E-14 1.151279187457282E-14
tp -1.401651505579669E-13 3.697872739257334E-13 6.640102162646845E-10 -1.555023623263168E-11 2.301707297011483E-10 2.023917442878681E-13
node 5.816083090205077E-15 -1.494051823835395E-14 -1.555023623263168E-11 2.856122288166384E-9 -2.852417570724337E-9 6.959139658643712E-11
peri 1.502396374501419E-14 -4.2619129344461E-14 2.301707297011483E-10 -2.852417570724337E-9 2.929727561721528E-9 -6.952482031919775E-11
i -4.160090666249016E-15 1.151279187457282E-14 2.023917442878681E-13 6.959139658643712E-11 -6.952482031919775E-11 1.93754370308342E-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 15.90   n/a E2021B55  
diameter diameter 5.289 km 0.883 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.036   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

192891 (1999 XK117)          Discovered 1999-Dec-05 by CSS at Catalina
Reference: 20081113/Numbers.arcLast Updated: 2008-11-17

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