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72240 (2001 AL21)
Classification: Main-belt Asteroid          SPK-ID: 2072240
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 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06900866107225161 3.1366e-08  
a 2.41194173576358 1.0566e-08 au
q 2.245496865994253 7.4697e-08 au
i 3.74393277669339 4.8037e-06 deg
node 339.6163527091568 5.4013e-05 deg
peri 68.30791713214215 6.6885e-05 deg
M 168.5030845969315 3.8387e-05 deg
tp 2458560.096052441896
(2019-Mar-17.59605244)
0.00014529 TDB
period 1368.19703729694
3.75
8.9902e-06
2.461e-08
d
yr
n .2631199967449345 1.7289e-09 deg/d
Q 2.578386605532907 1.1295e-08 au
  Orbit Determination Parameters
   # obs. used (total)      892  
   data-arc span      7557 days (20.69 yr)  
   first obs. used      1999-08-13  
   last obs. used      2020-04-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52729  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 13:00:59  

Additional Information
 Earth MOID = 1.25709 au 
 Jupiter MOID = 2.64712 au 
 T_jup = 3.513 
[ 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 15.83   n/a E2021B10  

72240 (2001 AL21)          Discovered 2001-Jan-03 by LINEAR at Socorro
Reference: 20031109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 2001 AL21 = 2002 JE49 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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