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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 7 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1324396283149114 1.4235e-07  
a 2.421948709393857 4.3001e-08 AU
q 2.101186722523955 3.2964e-07 AU
i 7.476929401596096 1.545e-05 deg
node 38.37545492429901 6.0697e-05 deg
peri 316.6153138364583 7.7121e-05 deg
M 81.02428955321923 4.3312e-05 deg
tp 2456490.644955959047
(2013-Jul-17.14495596)
0.00016446 JED
period 1376.720690423024
3.77
3.6665e-05
1.004e-07
d
yr
n .2614909491113865 6.964e-09 deg/d
Q 2.742710696263758 4.8696e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      227  
   data-arc span      5533 days (15.15 yr)  
   first obs. used      1998-10-17  
   last obs. used      2013-12-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .55301  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-11 14:53:08  

Additional Information
 Earth MOID = 1.10325 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 16.2 mag n/a MPO270778  

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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