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21809 (1999 TG19)
Classification: Main-belt Asteroid          SPK-ID: 2021809
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .01706384201843714 3.2351e-08  
a 2.695297551681449 1.228e-08 au
q 2.649305420066876 8.9054e-08 au
i 3.671456142166514 3.706e-06 deg
node 300.3200119813087 6.7455e-05 deg
peri 351.1625210223427 0.00014919 deg
M 55.9232853236284 0.00013353 deg
tp 2459145.427770970499
(2020-Oct-22.92777097)
0.00059927 TDB
period 1616.249866715735
4.43
1.1046e-05
3.024e-08
d
yr
n .2227378373936266 1.5223e-09 deg/d
Q 2.741289683296022 1.249e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1559  
   data-arc span      10770 days (29.49 yr)  
   first obs. used      1991-12-27  
   last obs. used      2021-06-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50251  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 14:04:31  

Additional Information
 Earth MOID = 1.63279 au 
 Jupiter MOID = 2.28188 au 
 T_jup = 3.367 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.04   n/a MPCxxxxx  
diameter diameter 4.691 km 0.265 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.168   0.036 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21809 (1999 TG19)          Discovered 1999-Oct-15 by Chesney, D. K. at High Point
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 TG19 = 1995 WH1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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