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187843 (1999 XN50)
Classification: Main-belt Asteroid          SPK-ID: 2187843
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06385538495737028 6.9334e-08  
a 3.123055975694569 3.3335e-08 au
q 2.923632034123177 2.413e-07 au
i 9.475107488197645 4.0381e-06 deg
node 234.3692117645722 2.5423e-05 deg
peri 133.2065826697431 4.2578e-05 deg
M 343.4047980424108 3.1809e-05 deg
tp 2459293.428327428865
(2021-Mar-19.92832743)
0.000178 TDB
period 2015.895796862677
5.52
3.2276e-05
8.837e-08
d
yr
n .1785806590599897 2.8592e-09 deg/d
Q 3.322479917265962 3.5463e-08 au
  Orbit Determination Parameters
   # obs. used (total)      602  
   data-arc span      7718 days (21.13 yr)  
   first obs. used      1999-11-09  
   last obs. used      2020-12-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50058  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:57:03  

Additional Information
 Earth MOID = 1.93248 au 
 Jupiter MOID = 2.03169 au 
 T_jup = 3.191 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457817.5 (2017-Mar-05.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06846180811307451 6.9709e-08  
q 2.907646373149452 2.4373e-07 au
tp 2457276.309714732328
(2015-Sep-10.80971473)
0.00016972 TDB
node 234.5105418467188 2.533e-05 deg
peri 133.0913954563892 4.0628e-05 deg
i 9.49538670300975 4.0479e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      602  
   data-arc span      7718 days (21.13 yr)  
   first obs. used      1999-11-09  
   last obs. used      2020-12-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50058  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:57:03  

Additional Information
 Jupiter MOID = 2.03169 au 
 T_jup = 3.191 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.859338429273555E-15 -1.693469086213824E-14 3.118856782630395E-12 -1.599747607873392E-14 6.794976766267811E-13 -1.097087083121639E-14
q -1.693469086213824E-14 5.940402889699447E-14 -1.121510906672912E-11 5.609023591094467E-14 -2.413372903868138E-12 3.912329117772565E-14
tp 3.118856782630395E-12 -1.121510906672912E-11 2.880374814054222E-8 -3.168079880817252E-11 5.40882632758399E-9 2.064226399466893E-12
node -1.599747607873392E-14 5.609023591094467E-14 -3.168079880817252E-11 6.41602720511737E-10 -6.386309990731622E-10 -1.210754964705128E-11
peri 6.794976766267811E-13 -2.413372903868138E-12 5.40882632758399E-9 -6.386309990731622E-10 1.650642485755984E-9 1.215979787295929E-11
i -1.097087083121639E-14 3.912329117772565E-14 2.064226399466893E-12 -1.210754964705128E-11 1.215979787295929E-11 1.638571195556036E-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 15.00   n/a E2021B55  

187843 (1999 XN50)          Discovered 1999-Dec-07 by LINEAR at Socorro
Reference: 20080618/Numbers.arcLast Updated: 2008-06-20

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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