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74994 (1999 TH271)
Classification: Main-belt Asteroid          SPK-ID: 2074994
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2241057670483434 4.911e-08  
a 2.263274905309488 1.2154e-08 au
q 1.756061946613839 1.1081e-07 au
i 5.357649381328922 5.4255e-06 deg
node 302.1938545821175 6.289e-05 deg
peri 2.11641359443261 6.4569e-05 deg
M 78.27230303000452 1.9031e-05 deg
tp 2458730.097937033926
(2019-Sep-03.59793703)		 6.4548e-05 TDB
period 1243.667796902195
3.40		 1.0018e-05
2.743e-08		 d
yr
n .2894663678650443 2.3316e-09 deg/d
Q 2.770487864005138 1.4877e-08 au
   Orbit Determination Parameters
   # obs. used (total)      585  
   data-arc span      9250 days (25.33 yr)  
   first obs. used      1994-01-07  
   last obs. used      2019-05-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58057  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 05:42:21  

Additional Information
 Earth MOID = .740872 au 
 Jupiter MOID = 2.47653 au 
 T_jup = 3.579 
[ 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 15.8   n/a MPO436308  

74994 (1999 TH271)          Discovered 1999-Oct-03 by LINEAR at Socorro
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1999 TH271 = 1994 AT7 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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