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18725 Atacama (1998 JL3)
Classification: Main-belt Asteroid          SPK-ID: 2018725
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1338592823971463 2.2658e-08  
a 2.75754416972178 1.0833e-08 au
q 2.388421285984388 6.1495e-08 au
i 8.817304419081232 6.8533e-07 deg
node 196.7770676617634 5.4596e-06 deg
peri 245.3104692792577 7.7311e-06 deg
M 123.5970956150197 5.3014e-06 deg
tp 2458626.267315913768
(2019-May-22.76731591)
2.2567e-05 TDB
period 1672.561683123581
4.58
9.8558e-06
2.698e-08
d
yr
n .2152386985977608 1.2683e-09 deg/d
Q 3.126667053459173 1.2283e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2161  
   data-arc span      25562 days (69.98 yr)  
   first obs. used      1951-03-28  
   last obs. used      2021-03-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44672  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 02:46:29  

Additional Information
 Earth MOID = 1.41931 au 
 Jupiter MOID = 2.18024 au 
 T_jup = 3.313 
[ 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 13.34   n/a E2021B10  
diameter diameter 6.048 km 0.200 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.278   0.036 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18725 Atacama           Discovered 1998 May 2 by the OCA-DLR Asteroid Survey at Caussols.
The Atacama desert, which covers regions II, III and IV of Chile, is one of the driest deserts on Earth. It contains many mineral resources, but also a number of very high-quality astronomical sites on which many modern instruments have been installed.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20030614/MPCPages.arcLast Updated: 2005-04-26

Alternate Designations
 1998 JL3 = 1999 RG111 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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