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21851 (1999 TO142)
Classification: Main-belt Asteroid          SPK-ID: 2021851
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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .228742588310434 3.1182e-08  
a 2.456738310844109 8.1327e-09 au
q 1.894777630820224 7.7953e-08 au
i 3.292780973609898 3.5809e-06 deg
node 98.16253011056622 6.1719e-05 deg
peri 248.8498587236499 6.2385e-05 deg
M 241.5486719562497 1.2006e-05 deg
tp 2459859.279601648436
(2022-Oct-06.77960165)
4.8311e-05 TDB
period 1406.49040702948
3.85
6.984e-06
1.912e-08
d
yr
n .2559562427164527 1.271e-09 deg/d
Q 3.018698990867994 9.9929e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1355  
   data-arc span      9929 days (27.18 yr)  
   first obs. used      1994-04-05  
   last obs. used      2021-06-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50793  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 05:11:43  

Additional Information
 Earth MOID = .890079 au 
 Jupiter MOID = 2.40704 au 
 T_jup = 3.454 
[ 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 15.01   n/a MPO614063  
diameter diameter 5.902 km 0.194 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.030   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21851 (1999 TO142)          Discovered 1999-Oct-07 by LINEAR at Socorro
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 TO142 = 1999 RB219 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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