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249997 (2001 XE202)
Classification: Main-belt Asteroid          SPK-ID: 2249997
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .175363808931435 4.2236e-08  
a 2.780331547254975 2.0472e-08 au
q 2.292762017036112 1.2335e-07 au
i 3.803658287913895 5.0487e-06 deg
node 296.7071489639413 7.5329e-05 deg
peri 102.3123708105087 7.7269e-05 deg
M 8.535260829765463 1.593e-05 deg
tp 2458960.352583397242
(2020-Apr-20.85258340)
7.478e-05 TDB
period 1693.33664960654
4.64
1.8703e-05
5.121e-08
d
yr
n .2125980088387319 2.3481e-09 deg/d
Q 3.267901077473837 2.4062e-08 au
  Orbit Determination Parameters
   # obs. used (total)      296  
   data-arc span      6589 days (18.04 yr)  
   first obs. used      2001-10-14  
   last obs. used      2019-10-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .61051  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-08 02:49:44  

Additional Information
 Earth MOID = 1.30427 au 
 Jupiter MOID = 2.16897 au 
 T_jup = 3.308 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457166.5 (2015-May-24.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .175282798560329 4.2335e-08  
q 2.293439021754822 1.2368e-07 au
tp 2457258.263202488744
(2015-Aug-23.76320249)
7.0306e-05 TDB
node 297.1978632822993 7.5477e-05 deg
peri 100.4509006490139 7.739e-05 deg
i 3.798368915106102 5.0489e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      296  
   data-arc span      6589 days (18.04 yr)  
   first obs. used      2001-10-14  
   last obs. used      2019-10-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .61051  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-08 02:49:44  

Additional Information
 Jupiter MOID = 2.16897 au 
 T_jup = 3.308 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.792241892346485E-15 -5.190309461362358E-15 -3.752845710102046E-13 -6.036850000610198E-15 -7.37701061171252E-14 -9.738062143965313E-16
q -5.190309461362358E-15 1.52964355209089E-14 1.208388620376013E-12 1.470612953845641E-14 2.425144064004428E-13 3.657836202167326E-15
tp -3.752845710102046E-13 1.208388620376013E-12 4.942979126041815E-9 -3.141541852762987E-11 1.228245875422715E-9 4.100449416538378E-13
node -6.036850000610198E-15 1.470612953845641E-14 -3.141541852762987E-11 5.696821251093059E-9 -5.691610018899243E-9 6.073187110126267E-11
peri -7.37701061171252E-14 2.425144064004428E-13 1.228245875422715E-9 -5.691610018899243E-9 5.989141948909851E-9 -6.05894890519738E-11
i -9.738062143965313E-16 3.657836202167326E-15 4.100449416538378E-13 6.073187110126267E-11 -6.05894890519738E-11 2.549149094594577E-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 16.6   n/a MPO494363  

249997 (2001 XE202)          Discovered 2001-Dec-11 by LINEAR at Socorro
Reference: 20100923/Numbers.arcLast Updated: 2010-09-27

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