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18869 (1999 TU222)
Classification: Main-belt Asteroid          SPK-ID: 2018869
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 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2340782974494288 1.9258e-08  
a 2.858771348553863 1.3622e-08 au
q 2.189595018487167 5.62e-08 au
i 16.36319983354623 3.429e-07 deg
node 52.35208651031031 1.4125e-06 deg
peri 141.8118770550461 2.0558e-06 deg
M 332.1220387846436 2.5736e-06 deg
tp 2459337.218116564067
(2021-May-02.71811656)
1.3371e-05 TDB
period 1765.499334146158
4.83
1.2619e-05
3.455e-08
d
yr
n .2039083181949233 1.4574e-09 deg/d
Q 3.527947678620559 1.681e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2023  
   data-arc span      8738 days (23.92 yr)  
   first obs. used      1997-04-07  
   last obs. used      2021-03-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48196  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:40:22  

Additional Information
 Earth MOID = 1.20788 au 
 Jupiter MOID = 1.51752 au 
 T_jup = 3.203 
[ 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 13.29   n/a E2021B10  
diameter diameter 7.203 km 0.221 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.235   0.050 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18869 (1999 TU222)          Discovered 1999-Oct-02 by LINEAR at Socorro
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 TU222 = 1953 CU = 1997 GL40 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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