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22798 (1999 NU18)
Classification: Main-belt Asteroid          SPK-ID: 2022798
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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07796839035275509 4.1325e-08  
a 3.091051609796807 1.8059e-08 au
q 2.850047291283657 1.3629e-07 au
i 11.19947422742727 4.0442e-06 deg
node 98.10183850345592 2.4257e-05 deg
peri 189.1865379600213 4.0232e-05 deg
M 340.7490268576457 3.2312e-05 deg
tp 2459306.647067058368
(2021-Apr-02.14706706)
0.00017818 TDB
period 1984.987660542712
5.43
1.7395e-05
4.762e-08
d
yr
n .1813613289170639 1.5894e-09 deg/d
Q 3.332055928309956 1.9467e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1381  
   data-arc span      9972 days (27.30 yr)  
   first obs. used      1993-05-18  
   last obs. used      2020-09-05  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55532  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 04:13:11  

Additional Information
 Earth MOID = 1.83228 au 
 Jupiter MOID = 1.8092 au 
 T_jup = 3.191 
[ 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 13.64   n/a E2021B10  
diameter diameter 6.701 km 0.276 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.157   0.028 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

22798 (1999 NU18)          Discovered 1999-Jul-14 by LINEAR at Socorro
Reference: 20010309/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 NU18 = 1998 HR103 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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