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185784 (1999 UK54)
Classification: Main-belt Asteroid          SPK-ID: 2185784
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .122014669063181 5.7798e-08  
a 3.091121872902551 3.4106e-08 au
q 2.713959660546386 1.932e-07 au
i 16.58949931398294 8.7352e-06 deg
node 189.3640909373347 2.0974e-05 deg
peri 102.3146087750606 4.5178e-05 deg
M 53.89287761211203 3.6588e-05 deg
tp 2459099.332376043812
(2020-Sep-06.83237604)
0.00020148 TDB
period 1985.055342455577
5.43
3.2853e-05
8.995e-08
d
yr
n .1813551452699895 3.0015e-09 deg/d
Q 3.468284085258716 3.8267e-08 au
  Orbit Determination Parameters
   # obs. used (total)      215  
   data-arc span      8068 days (22.09 yr)  
   first obs. used      1998-06-22  
   last obs. used      2020-07-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55015  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:48:33  

Additional Information
 Earth MOID = 1.75904 au 
 Jupiter MOID = 1.87654 au 
 T_jup = 3.150 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456681.5 (2014-Jan-24.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .120279144339236 5.8418e-08  
q 2.719109707004127 1.9447e-07 au
tp 2457119.756811203965
(2015-Apr-07.25681120)
0.00020596 TDB
node 189.5037422193314 2.099e-05 deg
peri 103.3674277613654 4.5572e-05 deg
i 16.578891093198 8.7325e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      215  
   data-arc span      8068 days (22.09 yr)  
   first obs. used      1998-06-22  
   last obs. used      2020-07-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55015  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:48:33  

Additional Information
 Jupiter MOID = 1.87654 au 
 T_jup = 3.150 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.412660346227285E-15 -1.125406760531983E-14 2.907675513048623E-12 -2.301758448579178E-15 6.365032690168438E-13 -1.187714097462294E-14
q -1.125406760531983E-14 3.781953048714782E-14 -9.830104190702949E-12 4.495916281155399E-15 -2.177260739844973E-12 4.439520052100824E-14
tp 2.907675513048623E-12 -9.830104190702949E-12 4.241996642679286E-8 -5.589551905766769E-11 8.354871340174915E-9 -7.105575391356396E-12
node -2.301758448579178E-15 4.495916281155399E-15 -5.589551905766769E-11 4.405653370912948E-10 -4.323319537998357E-10 8.099895563649801E-12
peri 6.365032690168438E-13 -2.177260739844973E-12 8.354871340174915E-9 -4.323319537998357E-10 2.076765168199583E-9 -9.514521029847166E-12
i -1.187714097462294E-14 4.439520052100824E-14 -7.105575391356396E-12 8.099895563649801E-12 -9.514521029847166E-12 7.625660526224578E-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 15.91   n/a E2021B55  
diameter diameter 3.985 km 0.122 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.044   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

185784 (1999 UK54)          Discovered 1999-Oct-19 by Spacewatch at Kitt Peak
Reference: 20080520/Numbers.arcLast Updated: 2008-05-22

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