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102473 (1999 TW244)
Classification: Main-belt Asteroid          SPK-ID: 2102473
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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3037543809860164 3.7753e-08  
a 2.67190647817976 1.578e-08 au
q 1.86030317984774 9.9282e-08 au
i 12.45447735226259 3.9293e-06 deg
node 189.4890434778695 2.0249e-05 deg
peri 271.006761717879 2.0996e-05 deg
M 250.6109221566854 6.796e-06 deg
tp 2459685.232084525673
(2022-Apr-15.73208453)
3.2133e-05 TDB
period 1595.255704405842
4.37
1.4132e-05
3.869e-08
d
yr
n .2256691507234466 1.9992e-09 deg/d
Q 3.48350977651178 2.0573e-08 au
  Orbit Determination Parameters
   # obs. used (total)      672  
   data-arc span      7602 days (20.81 yr)  
   first obs. used      1999-09-30  
   last obs. used      2020-07-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53216  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:42:09  

Additional Information
 Earth MOID = .924753 au 
 Jupiter MOID = 1.92839 au 
 T_jup = 3.281 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457568.5 (2016-Jun-29.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3037926635201 3.7661e-08  
q 1.859420935290496 9.9079e-08 au
tp 2458084.651848116761
(2017-Nov-27.15184812)
2.7045e-05 TDB
node 190.1262462939625 2.0236e-05 deg
peri 269.650575694554 2.1001e-05 deg
i 12.45955812819377 3.9297e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      672  
   data-arc span      7602 days (20.81 yr)  
   first obs. used      1999-09-30  
   last obs. used      2020-07-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53216  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:42:09  

Additional Information
 Jupiter MOID = 1.92839 au 
 T_jup = 3.281 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.418357298628338E-15 -3.711571536020509E-15 2.594005906142166E-13 -1.22471342783322E-14 3.70758176523846E-14 -6.300485775261936E-15
q -3.711571536020509E-15 9.81669345311696E-15 -6.42617554972461E-13 3.276402741282878E-14 -1.027463042352991E-13 1.655766263809869E-14
tp 2.594005906142166E-13 -6.42617554972461E-13 7.314461525339529E-10 -2.771901413057563E-12 1.717085140928323E-10 -4.971777242251519E-12
node -1.22471342783322E-14 3.276402741282878E-14 -2.771901413057563E-12 4.095073676738651E-10 -3.998235291984386E-10 -4.30198500661958E-12
peri 3.70758176523846E-14 -1.027463042352991E-13 1.717085140928323E-10 -3.998235291984386E-10 4.410300615114793E-10 3.284484424371075E-12
i -6.300485775261936E-15 1.655766263809869E-14 -4.971777242251519E-12 -4.30198500661958E-12 3.284484424371075E-12 1.544278185686916E-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 15.61   n/a E2021B55  
diameter diameter 4.195 km 0.235 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.069   0.019 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

102473 (1999 TW244)          Discovered 1999-Oct-07 by CSS at Catalina
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

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Alternate Designations
 1999 TW244 = 2001 HW 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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