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216931 (1998 UM16)
Classification: Main-belt Asteroid          SPK-ID: 2216931
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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2076812184174765 4.3005e-08  
a 2.449387668178133 1.2476e-08 au
q 1.940695852874157 1.0815e-07 au
i 5.333008298572273 4.4666e-06 deg
node 199.5626312029791 3.7776e-05 deg
peri 190.3400786038995 3.8745e-05 deg
M 289.5839917738643 1.0031e-05 deg
tp 2459474.375774385293
(2021-Sep-16.87577439)
4.0242e-05 TDB
period 1400.182732058232
3.83
1.0698e-05
2.929e-08
d
yr
n .2571092984919257 1.9644e-09 deg/d
Q 2.95807948348211 1.5067e-08 au
  Orbit Determination Parameters
   # obs. used (total)      614  
   data-arc span      7970 days (21.82 yr)  
   first obs. used      1998-10-18  
   last obs. used      2020-08-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52018  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 23:56:50  

Additional Information
 Earth MOID = .944941 au 
 Jupiter MOID = 2.48656 au 
 T_jup = 3.461 
[ 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 16.17   n/a E2021B55  

216931 (1998 UM16)          Discovered 1998-Oct-23 by Korlevic, K. at Visnjan
Reference: 20090806/Numbers.arcLast Updated: 2009-08-09

Alternate Designations
 1998 UM16 = 2003 AJ 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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