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181849 (1998 UM17)
Classification: Main-belt Asteroid          SPK-ID: 2181849
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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1333016505743749 5.0372e-08  
a 2.421455825259186 1.6383e-08 au
q 2.098671766959201 1.2592e-07 au
i 7.476330650379939 5.4249e-06 deg
node 38.21692430017512 3.9943e-05 deg
peri 316.5505324144753 4.4075e-05 deg
M 348.93619066974 1.8997e-05 deg
tp 2459242.797571642435
(2021-Jan-28.29757164)
7.2749e-05 TDB
period 1376.30045283136
3.77
1.3968e-05
3.824e-08
d
yr
n .2615707923799626 2.6546e-09 deg/d
Q 2.744239883559171 1.8567e-08 au
  Orbit Determination Parameters
   # obs. used (total)      388  
   data-arc span      8002 days (21.91 yr)  
   first obs. used      1998-10-17  
   last obs. used      2020-09-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53986  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:32:18  

Additional Information
 Earth MOID = 1.1004 au 
 Jupiter MOID = 2.71004 au 
 T_jup = 3.490 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.33   n/a E2021B55  

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 | Mission Design | Physical Parameters | Discovery Circumstances ]
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