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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1712056448191654 3.2199e-08  
a 2.209633126428878 7.5942e-09 au
q 1.831331462204833 7.2254e-08 au
i 6.875793082860829 4.1587e-06 deg
node 63.28754574260181 3.3169e-05 deg
peri 219.5670548332156 3.7558e-05 deg
M 229.2414729285701 2.1003e-05 deg
tp 2459636.258837983703
(2022-Feb-25.75883798)
7.1439e-05 TDB
period 1199.716647071418
3.28
6.1849e-06
1.693e-08
d
yr
n .3000708549629466 1.5469e-09 deg/d
Q 2.587934790652922 8.8943e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1067  
   data-arc span      7858 days (21.51 yr)  
   first obs. used      1999-09-14  
   last obs. used      2021-03-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52974  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 07:20:45  

Additional Information
 Earth MOID = .819176 au 
 Jupiter MOID = 2.55068 au 
 T_jup = 3.630 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457315.5 (2015-Oct-20.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1713509482684806 3.212e-08  
q 1.830805254388628 7.2051e-08 au
tp 2457237.454486012319
(2015-Aug-02.95448601)
6.4128e-05 TDB
node 63.30095658688372 3.3171e-05 deg
peri 219.6458291674821 3.7572e-05 deg
i 6.876146160660344 4.159e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1067  
   data-arc span      7858 days (21.51 yr)  
   first obs. used      1999-09-14  
   last obs. used      2021-03-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52974  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 07:20:45  

Additional Information
 Jupiter MOID = 2.55068 au 
 T_jup = 3.630 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.031665343665642E-15 -2.305673989544886E-15 -4.692453233802141E-13 1.224861335957089E-15 -1.174573289449468E-13 4.891283359555509E-17
q -2.305673989544886E-15 5.191361279950229E-15 1.249021507468571E-12 -3.771067363244012E-15 3.170186260698762E-13 2.945153615965163E-16
tp -4.692453233802141E-13 1.249021507468571E-12 4.112461345987756E-9 -1.229505192005261E-11 1.145699283215628E-9 4.735763740579575E-12
node 1.224861335957089E-15 -3.771067363244012E-15 -1.229505192005261E-11 1.100303947730276E-9 -1.095533054189869E-9 -3.358989146476976E-11
peri -1.174573289449468E-13 3.170186260698762E-13 1.145699283215628E-9 -1.095533054189869E-9 1.411681591088865E-9 3.469844787297666E-11
i 4.891283359555509E-17 2.945153615965163E-16 4.735763740579575E-12 -3.358989146476976E-11 3.469844787297666E-11 1.729764524572898E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.68   n/a MPCxxxxx  

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

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