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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07784620707589995 4.286e-08  
a 3.026980101396341 2.2532e-08 au
q 2.791341181608412 1.3339e-07 au
i 2.678453939695917 5.736e-06 deg
node 43.15248159758868 0.00010369 deg
peri 26.72950045053291 0.00011176 deg
M 259.274886285128 4.199e-05 deg
tp 2459538.705388382209
(2021-Nov-20.20538838)
0.00022571 TDB
period 1923.591174749776
5.27
2.1478e-05
5.88e-08
d
yr
n .187149954067984 2.0896e-09 deg/d
Q 3.262619021184269 2.4286e-08 au
  Orbit Determination Parameters
   # obs. used (total)      962  
   data-arc span      16330 days (44.71 yr)  
   first obs. used      1973-09-29  
   last obs. used      2018-06-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53056  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Oct-03 17:57:25  

Additional Information
 Earth MOID = 1.80589 au 
 Jupiter MOID = 1.95522 au 
 T_jup = 3.238 
[ 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 14.4   n/a MPO435884  
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

[ show close-approach data ]
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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