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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2127414050996797 3.5189e-08  
a 3.052138768746597 1.4543e-08 au
q 2.40282247852424 1.1254e-07 au
i 3.002147989041502 3.3629e-06 deg
node 104.7123948786853 9.1269e-05 deg
peri 303.277553777346 9.2196e-05 deg
M 331.3164391744687 1.2146e-05 deg
tp 2459355.679877102224
(2021-May-21.17987710)
6.595e-05 TDB
period 1947.622754950114
5.33
1.392e-05
3.811e-08
d
yr
n .1848407239466767 1.3211e-09 deg/d
Q 3.701455058968955 1.7636e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1457  
   data-arc span      15414 days (42.20 yr)  
   first obs. used      1978-11-01  
   last obs. used      2021-01-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50147  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 02:54:36  

Additional Information
 Earth MOID = 1.41369 au 
 Jupiter MOID = 1.69702 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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