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20657 Alvarez-Candal (1999 TL261)
Classification: Main-belt Asteroid          SPK-ID: 2020657
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1825780259447528 6.5811e-08  
a 3.10703879703047 3.223e-08 au
q 2.539761786934887 2.1233e-07 au
i 15.02087193860977 7.6365e-06 deg
node 124.7579869052326 2.4553e-05 deg
peri 254.8013631948117 3.1444e-05 deg
M 31.12818157140454 2.043e-05 deg
tp 2457427.530435673072
(2016-Feb-09.03043567)
0.00011274 JED
period 2000.407348397657
5.48
3.1126e-05
8.522e-08
d
yr
n .1799633461096626 2.8002e-09 deg/d
Q 3.674315807126053 3.8114e-08 au
  Orbit Determination Parameters
   # obs. used (total)      727  
   data-arc span      12192 days (33.38 yr)  
   first obs. used      1982-07-20  
   last obs. used      2015-12-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53192  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Feb-25 19:29:44  

Additional Information
 Earth MOID = 1.58936 au 
 Jupiter MOID = 1.9908 au 
 T_jup = 3.142 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.8 mag n/a MPO347683  

20657 Alvarez-Candal           Discovered 1999 Oct. 14 by the Lowell Observatory Near-Earth Object Search at the Anderson Mesa Station.
Alvaro Alvarez-Candal (b. 1977) is a planetary scientist who works at Paris Observatory. Using spectroscopy, he studies minor planets, transneptunian objects and the relationship between minor planets and comets.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20080718/MPCPages.arcLast Updated: 2008-07-18

Alternate Designations
 1999 TL261 = 2000 AH200 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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