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JPL Small-Body Database Browser
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20657 Alvarez-Candal (1999 TL261)
Classification: Main-belt Asteroid          SPK-ID: 2020657
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1812439397407378 5.0299e-08  
a 3.109009023100162 2.5332e-08 au
q 2.545519979063986 1.618e-07 au
i 15.01843965119152 5.0447e-06 deg
node 124.7140605006036 1.8997e-05 deg
peri 254.6914729014536 2.3309e-05 deg
M 211.3256244652411 1.6251e-05 deg
tp 2459427.422907290252
(2021-Jul-31.92290729)
9.6129e-05 TDB
period 2002.310388415875
5.48
2.4472e-05
6.7e-08
d
yr
n .1797923049706662 2.1974e-09 deg/d
Q 3.672498067136338 2.9923e-08 au
  Orbit Determination Parameters
   # obs. used (total)      927  
   data-arc span      13445 days (36.81 yr)  
   first obs. used      1982-07-20  
   last obs. used      2019-05-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51322  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 02:54:20  

Additional Information
 Earth MOID = 1.59531 au 
 Jupiter MOID = 1.99653 au 
 T_jup = 3.142 
[ 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 13.8   n/a MPO449103  
diameter diameter 10.366 km 0.040 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.033   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

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 | Mission Design | Physical Parameters | Discovery Circumstances ]
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