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21844 (1999 TN112)
Classification: Main-belt Asteroid          SPK-ID: 2021844
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 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05973181389069467 3.7065e-08  
a 2.975087337117698 1.4411e-08 au
q 2.797379973988421 1.1298e-07 au
i 2.673104115872255 3.1124e-06 deg
node 285.1116610692332 8.4123e-05 deg
peri 233.3450367104897 8.9195e-05 deg
M 259.642081963891 3.1313e-05 deg
tp 2459723.013058195293
(2022-May-23.51305820)
0.00016454 TDB
period 1874.338414260696
5.13
1.3619e-05
3.729e-08
d
yr
n .1920677702921628 1.3955e-09 deg/d
Q 3.152794700246974 1.5272e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1868  
   data-arc span      10956 days (30.00 yr)  
   first obs. used      1991-01-20  
   last obs. used      2021-01-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47867  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 02:54:42  

Additional Information
 Earth MOID = 1.80713 au 
 Jupiter MOID = 1.83849 au 
 T_jup = 3.257 
[ 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 13.87   n/a E2021B10  

21844 (1999 TN112)          Discovered 1999-Oct-04 by LINEAR at Socorro
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 TN112 = 1991 BM4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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