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74985 (1999 TD251)
Classification: Main-belt Asteroid          SPK-ID: 2074985
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 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1371212626553589 5.3997e-08  
a 2.542833950070677 1.7354e-08 au
q 2.194157348114072 1.33e-07 au
i 12.32779330557687 5.4898e-06 deg
node 349.6022943065141 2.4657e-05 deg
peri 250.8376490824023 3.8228e-05 deg
M 184.0111906421369 3.5425e-05 deg
tp 2459724.532366557785
(2022-May-25.03236656)
0.00014652 TDB
period 1481.069466358981
4.05
1.5162e-05
4.151e-08
d
yr
n .2430675995806016 2.4883e-09 deg/d
Q 2.891510552027282 1.9734e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1107  
   data-arc span      15663 days (42.88 yr)  
   first obs. used      1977-03-12  
   last obs. used      2020-01-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4381  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 17:25:18  

Additional Information
 Earth MOID = 1.21938 au 
 Jupiter MOID = 2.21715 au 
 T_jup = 3.399 
[ 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 14.2   n/a MPO395680  

74985 (1999 TD251)          Discovered 1999-Oct-05 by LINEAR at Socorro
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 TD251 = 1977 EN8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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