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18834 (1999 NN55)
Classification: Main-belt Asteroid          SPK-ID: 2018834
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06095984450243482 3.2019e-08  
a 2.572135442718896 1.115e-08 au
q 2.41533846609155 8.0687e-08 au
i 13.19435195781167 4.2538e-06 deg
node 243.8315555782007 1.3825e-05 deg
peri 41.36840157683726 4.2215e-05 deg
M 97.3682335511824 3.781e-05 deg
tp 2458792.975270395142
(2019-Nov-05.47527040)		 0.00015877 TDB
period 1506.742982870589
4.13		 9.7973e-06
2.682e-08		 d
yr
n .2389259509369951 1.5536e-09 deg/d
Q 2.728932419346241 1.183e-08 au
   Orbit Determination Parameters
   # obs. used (total)      1683  
   data-arc span      9269 days (25.38 yr)  
   first obs. used      1995-10-17  
   last obs. used      2021-03-03  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44401  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:39:15  

Additional Information
 Earth MOID = 1.41116 au 
 Jupiter MOID = 2.35146 au 
 T_jup = 3.389 
[ 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 14.22   n/a E2021B10  
diameter diameter 4.159 km 0.372 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.256   0.100 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18834 (1999 NN55)          Discovered 1999-Jul-12 by LINEAR at Socorro
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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