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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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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1159306608814468 2.5282e-08  
a 3.05663432783558 1.8031e-08 au
q 2.702276690136684 8.0869e-08 au
i 15.20983620369843 1.297e-06 deg
node 107.0439725524164 3.4005e-06 deg
peri 235.5187370899803 1.2313e-05 deg
M 328.6541615244028 1.0299e-05 deg
tp 2459370.457778853588
(2021-Jun-04.95777885)
5.6229e-05 TDB
period 1951.927380565172
5.34
1.7271e-05
4.729e-08
d
yr
n .1844330908948895 1.6319e-09 deg/d
Q 3.410991965534476 2.0121e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2205  
   data-arc span      11360 days (31.10 yr)  
   first obs. used      1989-09-04  
   last obs. used      2020-10-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43155  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:39:04  

Additional Information
 Earth MOID = 1.72193 au 
 Jupiter MOID = 1.97821 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

[ 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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