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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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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1712056466057079 3.2722e-08  
a 2.209633126731905 7.6567e-09 au
q 1.831331458508377 7.3255e-08 au
i 6.875793677467761 4.328e-06 deg
node 63.28754522253931 3.3184e-05 deg
peri 219.5670547755961 3.7599e-05 deg
M 229.2414732418181 2.1015e-05 deg
tp 2459636.258837029429
(2022-Feb-25.75883703)
7.1469e-05 TDB
period 1199.71664731821
3.28
6.2358e-06
1.707e-08
d
yr
n .3000708549012194 1.5597e-09 deg/d
Q 2.587934794955433 8.9675e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1044  
   data-arc span      7845 days (21.48 yr)  
   first obs. used      1999-09-14  
   last obs. used      2021-03-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .5314  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 13:16:02  

Additional Information
 Earth MOID = .819176 au 
 Jupiter MOID = 2.55068 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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