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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 
[ show covariance matrix ]

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

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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