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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 7 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1326897328714048 1.4281e-07  
a 2.422746305143632 4.3236e-08 AU
q 2.101272745098941 3.3143e-07 AU
i 7.475696630182322 1.545e-05 deg
node 38.32213558928837 6.0708e-05 deg
peri 316.8634123217965 7.6908e-05 deg
M 133.0640864979424 4.322e-05 deg
tp 2456491.381717603490
(2013-Jul-17.88171760)
0.00016347 JED
period 1377.400818556538
3.77
3.6871e-05
1.009e-07
d
yr
n .2613618310298856 6.9963e-09 deg/d
Q 2.744219865188323 4.8973e-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 = 1.10484 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 16.2 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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