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19889 (2304 T-2)
Classification: Main-belt Asteroid          SPK-ID: 2019889
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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0779197434806374 3.7169e-08  
a 3.025081773286994 1.8173e-08 au
q 2.78936817750452 1.2239e-07 au
i 2.678837424694912 4.4981e-06 deg
node 43.13141408910652 0.00010291 deg
peri 27.21545672281482 0.00011036 deg
M 296.2682327937899 4.1498e-05 deg
tp 2459540.718218049848
(2021-Nov-22.21821805)
0.00022276 TDB
period 1921.781928651913
5.26
1.7318e-05
4.741e-08
d
yr
n .1873261448829066 1.688e-09 deg/d
Q 3.260795369069468 1.9589e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1174  
   data-arc span      17272 days (47.29 yr)  
   first obs. used      1973-09-29  
   last obs. used      2021-01-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51923  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:08:33  

Additional Information
 Earth MOID = 1.80345 au 
 Jupiter MOID = 1.95502 au 
 T_jup = 3.239 
[ 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 14.44   n/a E2021B10  
diameter diameter 3.717 km 0.870 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.244   0.154 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

19889 (2304 T-2)          Discovered 1973-Sep-29 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar
Reference: 20001211/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 2304 T-2 = 1981 EE24 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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