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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 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457247.5 (2015-Aug-13.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1713366343497716 3.2641e-08  
q 1.83080989631777 7.3046e-08 au
tp 2457237.457103442334
(2015-Aug-02.95710344)
6.4231e-05 TDB
node 63.3018585305434 3.3186e-05 deg
peri 219.6461891109631 3.7613e-05 deg
i 6.87621160250075 4.3283e-06 deg
  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
 Jupiter MOID = 2.55068 au 
 T_jup = 3.630 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.065438363942495E-15 -2.37552484335286E-15 -4.896128424108267E-13 1.217100882970561E-15 -1.264894462542123E-13 -9.438282246138191E-17
q -2.37552484335286E-15 5.335762116534069E-15 1.29087880374452E-12 -3.71065244581889E-15 3.355986794570677E-13 5.50754358080592E-16
tp -4.896128424108267E-13 1.29087880374452E-12 4.125586741044554E-9 -1.15735419710368E-11 1.150678358769241E-9 3.974854372112277E-12
node 1.217100882970561E-15 -3.71065244581889E-15 -1.15735419710368E-11 1.101312793174242E-9 -1.096333214848805E-9 -3.480954315827045E-11
peri -1.264894462542123E-13 3.355986794570677E-13 1.150678358769241E-9 -1.096333214848805E-9 1.414766950789416E-9 3.571356694670198E-11
i -9.438282246138191E-17 5.50754358080592E-16 3.974854372112277E-12 -3.480954315827045E-11 3.571356694670198E-11 1.873458631525806E-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 15.7   n/a MPO502609  

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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
2062-Mar-09 00:19 < 00:01 Juno 0.0314185231925753 0.0314100783465483 0.0314269687962043 9.57052370616296 9.57052366570309 2474257.512888321 0.214255973549828 486.594704647235 30.4147697405035 30.1454349140363 78038.060415014 T 26 CATAB v2.0f-lin.ifort 2021-Apr-13 13:16:05 2021-Apr-13 13:16

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