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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 | 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 .01722296808876901 3.2917e-08  
a 2.696750307858246 1.2213e-08 au
q 2.650304263362626 9.0653e-08 au
i 3.673212515504924 3.7383e-06 deg
node 300.334239172157 6.9269e-05 deg
peri 353.7263108402252 0.00015059 deg
M 9.76907982015118 0.00013411 deg
tp 2459156.605441043421
(2020-Nov-03.10544104)
0.00060254 TDB
period 1617.55677251943
4.43
1.0988e-05
3.008e-08
d
yr
n .2225578762464584 1.5119e-09 deg/d
Q 2.743196352353867 1.2423e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1532  
   data-arc span      10460 days (28.64 yr)  
   first obs. used      1991-12-27  
   last obs. used      2020-08-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50355  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 01:54:51  

Additional Information
 Earth MOID = 1.63226 au 
 Jupiter MOID = 2.28357 au 
 T_jup = 3.366 
[ 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 14.03   n/a E2021B10  
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

[ show close-approach data ]
Alternate Designations
 1999 TG19 = 1995 WH1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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