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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05467717150314971 4.2649e-08  
a 2.96923105189971 1.948e-08 au
q 2.806881896442512 1.2589e-07 au
i 11.75361716258596 4.3559e-06 deg
node 121.2063958049049 2.2326e-05 deg
peri 95.51961415400206 4.7332e-05 deg
M 98.10869061263313 4.0228e-05 deg
tp 2458491.205019134995
(2019-Jan-07.70501914)
0.00020972 TDB
period 1868.806850509458
5.12
1.8391e-05
5.035e-08
d
yr
n .192636280149476 1.8957e-09 deg/d
Q 3.131580207356908 2.0545e-08 au
  Orbit Determination Parameters
   # obs. used (total)      994  
   data-arc span      10088 days (27.62 yr)  
   first obs. used      1992-01-10  
   last obs. used      2019-08-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52573  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 22:35:33  

Additional Information
 Earth MOID = 1.82996 au 
 Jupiter MOID = 1.95697 au 
 T_jup = 3.229 
[ 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 13.9   n/a MPO492954  
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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