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74861 (1999 TW90)
Classification: Main-belt Asteroid          SPK-ID: 2074861
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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1712546480238552 3.5916e-08  
a 2.209595054151728 8.0236e-09 au
q 1.831191630877723 7.9423e-08 au
i 6.876326875369791 5.3887e-06 deg
node 63.29341655623826 3.4173e-05 deg
peri 219.5272677770432 3.8663e-05 deg
M 169.2751239019083 2.0948e-05 deg
tp 2458436.397401659382
(2018-Nov-13.89740166)
6.8161e-05 TDB
period 1199.68564028523
3.28
6.5346e-06
1.789e-08
d
yr
n .3000786105220103 1.6345e-09 deg/d
Q 2.587998477425734 9.3977e-09 au
  Orbit Determination Parameters
   # obs. used (total)      959  
   data-arc span      7732 days (21.17 yr)  
   first obs. used      1999-09-14  
   last obs. used      2020-11-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53192  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-17 22:01:14  

Additional Information
 Earth MOID = .820887 au 
 Jupiter MOID = 2.5514 au 
 T_jup = 3.630 
[ 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 15.7   n/a MPO502609  

74861 (1999 TW90)          Discovered 1999-Oct-02 by LINEAR at Socorro
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 TW90 = 2001 DL3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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