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181872 (1999 FL90)
Classification: Main-belt Asteroid          SPK-ID: 2181872
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1390683737375728 4.5333e-08  
a 2.751736889090604 2.0419e-08 au
q 2.369057314971086 1.2685e-07 au
i 13.41907764936385 6.22e-06 deg
node 176.4912231365805 1.991e-05 deg
peri 77.30452819840656 3.0995e-05 deg
M 220.6242012313588 2.7841e-05 deg
tp 2459845.996147076919
(2022-Sep-23.49614708)
0.00013356 TDB
period 1667.280941172801
4.56
1.8558e-05
5.081e-08
d
yr
n .215920419354622 2.4034e-09 deg/d
Q 3.134416463210122 2.3259e-08 au
  Orbit Determination Parameters
   # obs. used (total)      305  
   data-arc span      8862 days (24.26 yr)  
   first obs. used      1996-10-09  
   last obs. used      2021-01-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55196  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:32:24  

Additional Information
 Earth MOID = 1.39807 au 
 Jupiter MOID = 2.00082 au 
 T_jup = 3.292 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457050.5 (2015-Jan-28.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1400277186230052 4.4972e-08  
q 2.365241998937854 1.2573e-07 au
tp 2456514.767368085244
(2013-Aug-10.26736809)
0.00011267 TDB
node 176.5294688168425 1.9893e-05 deg
peri 77.63608075226048 3.0996e-05 deg
i 13.42686099480668 6.2236e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      305  
   data-arc span      8862 days (24.26 yr)  
   first obs. used      1996-10-09  
   last obs. used      2021-01-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55196  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:32:24  

Additional Information
 Jupiter MOID = 2.00082 au 
 T_jup = 3.292 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.022489642439229E-15 -5.59952283383788E-15 -1.887554200669771E-12 2.366556283921454E-15 -4.120772570847991E-13 1.390027418264241E-15
q -5.59952283383788E-15 1.580705647087224E-14 6.062849420636726E-12 -5.709602354868541E-15 1.327650337252297E-12 -3.037823178261847E-15
tp -1.887554200669771E-12 6.062849420636726E-12 1.269351085398542E-8 7.222946484899279E-12 2.698549170141951E-9 3.106701543167086E-12
node 2.366556283921454E-15 -5.709602354868541E-15 7.222946484899279E-12 3.957399060165651E-10 -3.830358022159865E-10 3.800342831307809E-11
peri -4.120772570847991E-13 1.327650337252297E-12 2.698549170141951E-9 -3.830358022159865E-10 9.607351849502772E-10 -3.625689670662922E-11
i 1.390027418264241E-15 -3.037823178261847E-15 3.106701543167086E-12 3.800342831307809E-11 -3.625689670662922E-11 3.873362944839487E-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 16.05   n/a MPCxxxxx  

181872 (1999 FL90)          Discovered 1999-Mar-21 by Sloan Digital Sky Survey at Apache Point
Reference: 20080420/Numbers.arcLast Updated: 2008-04-23

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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