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JPL Small-Body Database Browser
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47217 (1999 UF18)
Classification: Main-belt Asteroid          SPK-ID: 2047217
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .102507558383949 4.5532e-08  
a 2.212690070729471 8.4406e-09 au
q 1.985872614118586 1.0185e-07 au
i 2.299992916870573 4.5982e-06 deg
node 138.1555546490252 0.0001117 deg
peri 40.28019805382358 0.00011385 deg
M 300.1304914488583 2.4491e-05 deg
tp 2459200.432087167602
(2020-Dec-16.93208717)
8.2376e-05 TDB
period 1202.207152224307
3.29
6.879e-06
1.883e-08
d
yr
n .299449224980847 1.7134e-09 deg/d
Q 2.439507527340357 9.3058e-09 au
  Orbit Determination Parameters
   # obs. used (total)      773  
   data-arc span      7881 days (21.58 yr)  
   first obs. used      1998-05-22  
   last obs. used      2019-12-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57774  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 08:43:42  

Additional Information
 Earth MOID = .990128 au 
 Jupiter MOID = 2.51918 au 
 T_jup = 3.648 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456318.5 (2013-Jan-26.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .103095058461254 4.5557e-08  
q 1.984165961506828 1.0195e-07 au
tp 2456796.562583847950
(2014-May-19.06258385)
7.5667e-05 TDB
node 138.2093047669687 0.00011181 deg
peri 40.42653384773723 0.00011393 deg
i 2.298970130761892 4.5968e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      773  
   data-arc span      7881 days (21.58 yr)  
   first obs. used      1998-05-22  
   last obs. used      2019-12-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57774  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 08:43:42  

Additional Information
 Jupiter MOID = 2.51918 au 
 T_jup = 3.648 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.075442696623225E-15 -4.632036135424194E-15 -4.417766786797373E-13 1.322401917748152E-14 -9.472362263945948E-14 1.607658171068602E-17
q -4.632036135424194E-15 1.039442407321982E-14 1.198107665387695E-12 -2.918406243069628E-14 2.662170042455342E-13 3.717510309889794E-17
tp -4.417766786797373E-13 1.198107665387695E-12 5.725474782671135E-9 -3.467217325917285E-12 1.67272954074494E-9 1.411162369567941E-12
node 1.322401917748152E-14 -2.918406243069628E-14 -3.467217325917285E-12 1.250066479001689E-8 -1.249031644758485E-8 5.611122122962266E-11
peri -9.472362263945948E-14 2.662170042455342E-13 1.67272954074494E-9 -1.249031644758485E-8 1.297970159966687E-8 -5.5662190305528E-11
i 1.607658171068602E-17 3.717510309889794E-17 1.411162369567941E-12 5.611122122962266E-11 -5.5662190305528E-11 2.113080154970421E-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 16.0   n/a MPO452815  

47217 (1999 UF18)          Discovered 1999-Oct-30 by Spacewatch at Kitt Peak
Reference: 20020921/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 UF18 = 1998 KS31 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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