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74808 (1999 TW1)
Classification: Main-belt Asteroid          SPK-ID: 2074808
[ 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 .1097053934757004 3.0513e-08  
a 2.35573522120393 8.4826e-09 au
q 2.097298361837187 7.366e-08 au
i 4.579560693969215 4.4135e-06 deg
node 183.3864799225969 4.2159e-05 deg
peri 117.893369337659 4.6971e-05 deg
M 18.88564340729788 2.0273e-05 deg
tp 2459131.218477309144
(2020-Oct-08.71847731)		 7.434e-05 TDB
period 1320.651228597809
3.62		 7.1332e-06
1.953e-08		 d
yr
n .272592787712943 1.4723e-09 deg/d
Q 2.614172080570673 9.4132e-09 au
   Orbit Determination Parameters
   # obs. used (total)      1416  
   data-arc span      8313 days (22.76 yr)  
   first obs. used      1998-03-03  
   last obs. used      2020-12-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48016  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 06:59:10  

Additional Information
 Earth MOID = 1.08477 au 
 Jupiter MOID = 2.5673 au 
 T_jup = 3.542 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456730.5 (2014-Mar-14.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1098459604089825 3.0584e-08  
q 2.096139963953605 7.376e-08 au
tp 2456489.000991027946
(2013-Jul-15.50099103)		 7.4216e-05 TDB
node 183.4848105468966 4.224e-05 deg
peri 117.4661000764532 4.699e-05 deg
i 4.574659746668199 4.4107e-06 deg
   Orbit Determination Parameters
   # obs. used (total)      1416  
   data-arc span      8313 days (22.76 yr)  
   first obs. used      1998-03-03  
   last obs. used      2020-12-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48016  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 06:59:10  

Additional Information
 Jupiter MOID = 2.5673 au 
 T_jup = 3.542 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.353554664529338E-16 -2.244681743617279E-15 4.163833770300564E-13 -1.214711839411114E-15 1.173305381743624E-13 -7.517191921152723E-16
q -2.244681743617279E-15 5.440497225015484E-15 -1.042199431270074E-12 3.229263324195243E-15 -2.911724605089338E-13 2.008395234862E-15
tp 4.163833770300564E-13 -1.042199431270074E-12 5.507955680252731E-9 -2.229146202909166E-12 1.535912508868371E-9 -2.196871014280282E-13
node -1.214711839411114E-15 3.229263324195243E-15 -2.229146202909166E-12 1.784186336959597E-9 -1.778769802118026E-9 1.69174332504009E-11
peri 1.173305381743624E-13 -2.911724605089338E-13 1.535912508868371E-9 -1.778769802118026E-9 2.208052198522401E-9 -1.693956674858756E-11
i -7.517191921152723E-16 2.008395234862E-15 -2.196871014280282E-13 1.69174332504009E-11 -1.693956674858756E-11 1.945407043205987E-11

[ 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 15.15   n/a E2021B10  

74808 (1999 TW1)          Discovered 1999-Oct-01 by Korlevic, K. at Visnjan
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

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