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18827 (1999 NA26)
Classification: Main-belt Asteroid          SPK-ID: 2018827
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1151894582102713 2.5243e-08  
a 3.054553704823631 1.8267e-08 au
q 2.70270131849082 8.0565e-08 au
i 15.20355854905736 1.2954e-06 deg
node 107.0253051560093 3.4043e-06 deg
peri 235.3357495435331 1.238e-05 deg
M 4.960555429968728 1.0409e-05 deg
tp 2459369.631224115427
(2021-Jun-04.13122412)
5.6317e-05 TDB
period 1949.934731100738
5.34
1.7491e-05
4.789e-08
d
yr
n .1846215641262926 1.6561e-09 deg/d
Q 3.406406091156442 2.0371e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2257  
   data-arc span      11629 days (31.84 yr)  
   first obs. used      1989-09-04  
   last obs. used      2021-07-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42881  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 10:08:35  

Additional Information
 Earth MOID = 1.72322 au 
 Jupiter MOID = 1.97981 au 
 T_jup = 3.172 
[ 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 12.25   n/a E2021B10  
diameter diameter 20.607 km 0.115 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.066   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18827 (1999 NA26)          Discovered 1999-Jul-14 by LINEAR at Socorro
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1999 NA26 = 1989 RV5 = 1998 HE120 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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