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103216 (1999 XT261)
Classification: Main-belt Asteroid          SPK-ID: 2103216
[ 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 .2032608262503176 5.8117e-08  
a 2.568468626055889 1.3524e-08 au
q 2.046399570925751 1.5509e-07 au
i 17.01332002684878 7.6899e-06 deg
node 7.376909656926178 1.1634e-05 deg
peri 36.46383605342819 2.5816e-05 deg
M 66.85487776445544 2.1431e-05 deg
tp 2458921.283921709984
(2020-Mar-12.78392171)		 8.8203e-05 TDB
period 1503.522129507918
4.12		 1.1875e-05
3.251e-08		 d
yr
n .2394377794211935 1.8911e-09 deg/d
Q 3.090537681186027 1.6273e-08 au
   Orbit Determination Parameters
   # obs. used (total)      1502  
   data-arc span      7766 days (21.26 yr)  
   first obs. used      1999-10-18  
   last obs. used      2021-01-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46543  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 08:33:43  

Additional Information
 Earth MOID = 1.07291 au 
 Jupiter MOID = 2.4469 au 
 T_jup = 3.341 
[ show covariance matrix ]

[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.13   n/a E2021B55  

103216 (1999 XT261)          Discovered 1999-Dec-04 by LONEOS at Anderson Mesa
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

Alternate Designations
 1999 XT261 = 2001 FZ49 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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