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181849 (1998 UM17)
Classification: Main-belt Asteroid          SPK-ID: 2181849
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1326896620258139 1.2863e-07  
a 2.422746313170017 4.2475e-08 AU
q 2.101272923701201 2.9182e-07 AU
i 7.475697737639955 1.1378e-05 deg
node 38.32213325567596 5.9931e-05 deg
peri 316.8633776579428 6.841e-05 deg
M 133.0641169545886 3.3257e-05 deg
tp 2456491.381598542899
(2013-Jul-17.88159854)
0.0001226 JED
period 1377.400825401383
3.77
3.6222e-05
9.917e-08
d
yr
n .2613618297310762 6.8732e-09 deg/d
Q 2.744219702638833 4.8111e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      245  
   data-arc span      5944 days (16.27 yr)  
   first obs. used      1998-10-17  
   last obs. used      2015-01-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .547  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Feb-04 18:49:44  

Additional Information
 Earth MOID = 1.10484 AU 
 T_jup = 3.489 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.3 mag n/a MPO325714  

181849 (1998 UM17)          Discovered 1998-Oct-17 by Beijing Schmidt CCD Asteroid Program at Xinglong (327)
Reference: 20080420/Numbers.arcLast Updated: 2008-04-23

Alternate Designations
 1998 UM17 = 2002 XT111 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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