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91813 (1999 TL254)
Classification: Main-belt Asteroid          SPK-ID: 2091813
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1092301144411866 4.3945e-08  
a 2.994319595138527 2.1469e-08 au
q 2.667249723088058 1.3905e-07 au
i 12.1084791883353 5.4007e-06 deg
node 128.2591884068358 1.7905e-05 deg
peri 242.771187273364 2.8863e-05 deg
M 4.555821475739779 2.318e-05 deg
tp 2458976.549760968775
(2020-May-07.04976097)
0.00012181 TDB
period 1892.542562774766
5.18
2.0354e-05
5.573e-08
d
yr
n .1902202925741248 2.0458e-09 deg/d
Q 3.321389467188996 2.3814e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1017  
   data-arc span      10489 days (28.72 yr)  
   first obs. used      1991-02-13  
   last obs. used      2019-11-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51993  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 22:37:27  

Additional Information
 Earth MOID = 1.69081 au 
 Jupiter MOID = 2.17537 au 
 T_jup = 3.212 
[ 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 14.0   n/a MPO449564  

91813 (1999 TL254)          Discovered 1999-Oct-08 by LINEAR at Socorro
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1936-Jun-27 00:09 00:02 Inter 0.0396690344706317 0.039660629885322 0.0396774515729251 8.75418343343001 8.75418339127479 2428346.506040935 2.0045156290393 1192.83275673936 42.4133784705619 -69.5147172631483 131054.233726005 T 27 CATAB v2.0f-lin.ifort 2020-Feb-23 22:37:43 2020-Feb-23 22:37
2099-Apr-23 08:14 00:03 Inter 0.0426185397922888 0.0426175679485909 0.0426195184984195 8.37614750298925 8.37614746198056 2487816.843224778 2.54484413954393 1459.56096280122 39.4522808173869 88.8839389521147 161537.411807951 T 27 CATAB v2.0f-lin.ifort 2020-Feb-23 22:37:43 2020-Feb-23 22:37

Alternate Designations
 1999 TL254 = 2001 AA16 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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