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100513 (1997 AL21)
Classification: Main-belt Asteroid          SPK-ID: 2100513
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09682126215001996 4.4287e-08  
a 2.44490495582636 9.7926e-09 au
q 2.208186172166413 1.0791e-07 au
i 6.565878704930864 3.6724e-06 deg
node 32.37493484152812 4.3659e-05 deg
peri 75.02990224852695 4.9566e-05 deg
M 54.87923600085598 2.2881e-05 deg
tp 2458787.638580436393
(2019-Oct-31.13858044)
8.8707e-05 TDB
period 1396.340704190985
3.82
8.3892e-06
2.297e-08
d
yr
n .2578167340674766 1.549e-09 deg/d
Q 2.681623739486307 1.0741e-08 au
  Orbit Determination Parameters
   # obs. used (total)      883  
   data-arc span      8509 days (23.30 yr)  
   first obs. used      1997-01-10  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51879  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 17:53:16  

Additional Information
 Earth MOID = 1.23574 au 
 Jupiter MOID = 2.42519 au 
 T_jup = 3.484 
[ 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 15.6   n/a MPO412741  

100513 (1997 AL21)          Discovered 1997-Jan-10 by Kawasato, N. at Uenohara
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 1997 AL21 = 2001 CA36 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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