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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 ]

[ show orbit diagram ]
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 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456947.5 (2014-Oct-17.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1159201908074298 2.5189e-08  
q 2.698687043454947 8.0237e-08 au
tp 2457430.025646264706
(2016-Feb-11.52564626)
5.5147e-05 TDB
node 107.0628514306564 3.4018e-06 deg
peri 237.0860790882101 1.2413e-05 deg
i 15.21074216866453 1.2952e-06 deg
  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
 Jupiter MOID = 1.97981 au 
 T_jup = 3.172 
Orbit Covariance (6×6)
  e q tp node peri i
e 6.344876879055659E-16 -1.982261643896987E-15 -1.925030722090955E-13 1.238006772469424E-14 -8.306037402070165E-15 -5.760038941233583E-15
q -1.982261643896987E-15 6.437957028144522E-15 5.323691429075906E-13 -3.87506834976125E-14 4.665888266297188E-15 1.899478489117289E-14
tp -1.925030722090955E-13 5.323691429075906E-13 3.04119458288876E-9 -2.677190183760372E-12 6.522146795026712E-10 1.680886292606727E-11
node 1.238006772469424E-14 -3.87506834976125E-14 -2.677190183760372E-12 1.157191007101893E-11 -1.124336471069202E-11 2.6774029592555E-12
peri -8.306037402070165E-15 4.665888266297188E-15 6.522146795026712E-10 -1.124336471069202E-11 1.540853072667057E-10 2.393114760637658E-13
i -5.760038941233583E-15 1.899478489117289E-14 1.680886292606727E-11 2.6774029592555E-12 2.393114760637658E-13 1.677625573014538E-12

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

[ show close-approach data ]
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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