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18822 (1999 NL19)
Classification: Main-belt Asteroid          SPK-ID: 2018822
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0549307721185946 3.9621e-08  
a 2.967401593924941 1.752e-08 au
q 2.804399933184695 1.1321e-07 au
i 11.75433352510836 3.8662e-06 deg
node 121.208598039714 1.8209e-05 deg
peri 94.91324153013956 3.9912e-05 deg
M 137.2669885784752 3.5363e-05 deg
tp 2458488.587660473779
(2019-Jan-05.08766047)
0.0001832 TDB
period 1867.079950420273
5.11
1.6535e-05
4.527e-08
d
yr
n .1928144533494483 1.7076e-09 deg/d
Q 3.130403254665186 1.8483e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1241  
   data-arc span      10601 days (29.02 yr)  
   first obs. used      1992-01-10  
   last obs. used      2021-01-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49876  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:38:50  

Additional Information
 Earth MOID = 1.82668 au 
 Jupiter MOID = 1.95628 au 
 T_jup = 3.230 
[ 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 14.02   n/a E2021B10  
diameter diameter 5.433 km 0.241 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.217   0.043 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18822 (1999 NL19)          Discovered 1999-Jul-14 by LINEAR at Socorro
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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