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187849 (1999 XM248)
Classification: Main-belt Asteroid          SPK-ID: 2187849
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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .200457793144791 3.6259e-08  
a 2.280193344575246 1.0556e-08 au
q 1.823110818778252 8.1393e-08 au
i 6.703644340005321 4.8428e-06 deg
node 203.1428517259662 3.8315e-05 deg
peri 218.7258327520513 4.0519e-05 deg
M 47.49081272851676 1.3684e-05 deg
tp 2459034.593638621621
(2020-Jul-04.09363862)
4.749e-05 TDB
period 1257.638828748713
3.44
8.733e-06
2.391e-08
d
yr
n .2862507039148766 1.9877e-09 deg/d
Q 2.737275870372239 1.2672e-08 au
  Orbit Determination Parameters
   # obs. used (total)      459  
   data-arc span      7858 days (21.51 yr)  
   first obs. used      1999-10-10  
   last obs. used      2021-04-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49129  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 10:15:22  

Additional Information
 Earth MOID = .840237 au 
 Jupiter MOID = 2.61166 au 
 T_jup = 3.570 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457870.5 (2017-Apr-27.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2002031860363798 3.6391e-08  
q 1.823452017331639 8.1704e-08 au
tp 2457774.731482974928
(2017-Jan-21.23148297)
4.5966e-05 TDB
node 203.2093537528542 3.824e-05 deg
peri 218.150835406478 4.0465e-05 deg
i 6.709310537652871 4.8489e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      459  
   data-arc span      7858 days (21.51 yr)  
   first obs. used      1999-10-10  
   last obs. used      2021-04-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49129  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 10:15:22  

Additional Information
 Jupiter MOID = 2.61166 au 
 T_jup = 3.570 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.324281957284805E-15 -2.957933175858758E-15 -3.079218542387869E-13 -1.012624328452478E-14 -9.12209794218415E-14 1.481834712871773E-15
q -2.957933175858758E-15 6.675586731374136E-15 7.411773219369434E-13 2.235967483080123E-14 2.189874228607354E-13 -3.438659271264686E-15
tp -3.079218542387869E-13 7.411773219369434E-13 2.112882605405012E-9 -6.007994272821594E-12 6.26694842172725E-10 -2.974933595127273E-12
node -1.012624328452478E-14 2.235967483080123E-14 -6.007994272821594E-12 1.462272894060976E-9 -1.453229035379344E-9 -4.642232444118655E-11
peri -9.12209794218415E-14 2.189874228607354E-13 6.26694842172725E-10 -1.453229035379344E-9 1.637390789176398E-9 4.531228988175746E-11
i 1.481834712871773E-15 -3.438659271264686E-15 -2.974933595127273E-12 -4.642232444118655E-11 4.531228988175746E-11 2.351153809689452E-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 16.86   n/a MPCxxxxx  

187849 (1999 XM248)          Discovered 1999-Dec-06 by LINEAR at Socorro
Reference: 20080618/Numbers.arcLast Updated: 2008-06-20
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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