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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 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1326897150126929 1.2603e-07  
a 2.422746304028703 4.2274e-08 AU
q 2.10127278739908 2.8428e-07 AU
i 7.475701608136405 1.0236e-05 deg
node 38.32213049769078 5.9851e-05 deg
peri 316.8634129442319 6.6601e-05 deg
M 133.064090688657 3.0862e-05 deg
tp 2456491.381701920779
(2013-Jul-17.88170192)
0.00011251 JED
period 1377.400817605734
3.77
3.6051e-05
9.87e-08
d
yr
n .2613618312103007 6.8407e-09 deg/d
Q 2.744219820658327 4.7883e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      284  
   data-arc span      6018 days (16.48 yr)  
   first obs. used      1998-10-17  
   last obs. used      2015-04-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53516  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-04 22:19:52  

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
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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