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21830 (1999 TW93)
Classification: Main-belt Asteroid          SPK-ID: 2021830
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .212772765251975 3.5188e-08  
a 3.052163681226513 1.4411e-08 au
q 2.4027463747703 1.1248e-07 au
i 3.002140895023909 3.3599e-06 deg
node 104.7118876390692 9.125e-05 deg
peri 303.3088687904018 9.2177e-05 deg
M 7.525755190424501 1.2197e-05 deg
tp 2459355.784690239477
(2021-May-21.28469024)
6.5924e-05 TDB
period 1947.646600627908
5.33
1.3793e-05
3.776e-08
d
yr
n .1848384608809105 1.3091e-09 deg/d
Q 3.701580987682725 1.7477e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1475  
   data-arc span      15444 days (42.28 yr)  
   first obs. used      1978-11-01  
   last obs. used      2021-02-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .5034  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 18:37:00  

Additional Information
 Earth MOID = 1.41398 au 
 Jupiter MOID = 1.69782 au 
 T_jup = 3.199 
[ 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 14.3   n/a MPO449113  
diameter diameter 6.519 km 1.154 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.095   0.034 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

21830 (1999 TW93)          Discovered 1999-Oct-02 by LINEAR at Socorro
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 TW93 = 1978 VH16 = 1978 XS1 = 1993 ON5 = 1999 TZ218 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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