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216923 (1998 DM12)
Classification: Main-belt Asteroid          SPK-ID: 2216923
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09602152130319741 4.6611e-08  
a 2.255084576244344 1.269e-08 au
q 2.038547924565986 1.0561e-07 au
i 5.856993461221688 5.2271e-06 deg
node 140.4929702143923 4.7076e-05 deg
peri 51.37390784024814 5.5259e-05 deg
M 304.813977870052 3.1248e-05 deg
tp 2459586.113506110399
(2022-Jan-06.61350611)
0.00010829 TDB
period 1236.923038935616
3.39
1.0441e-05
2.859e-08
d
yr
n .2910447850577538 2.4567e-09 deg/d
Q 2.471621227922702 1.3909e-08 au
  Orbit Determination Parameters
   # obs. used (total)      266  
   data-arc span      8385 days (22.96 yr)  
   first obs. used      1998-02-23  
   last obs. used      2021-02-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52571  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 23:56:48  

Additional Information
 Earth MOID = 1.04574 au 
 Jupiter MOID = 2.48896 au 
 T_jup = 3.611 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457758.5 (2017-Jan-05.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09558679857678846 4.6706e-08  
q 2.039611605510556 1.0575e-07 au
tp 2458350.493657666161
(2018-Aug-19.99365767)
0.0001029 TDB
node 140.5353488706272 4.7106e-05 deg
peri 51.65087987377019 5.5329e-05 deg
i 5.854973766066868 5.2252e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      266  
   data-arc span      8385 days (22.96 yr)  
   first obs. used      1998-02-23  
   last obs. used      2021-02-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52571  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 23:56:48  

Additional Information
 Jupiter MOID = 2.48896 au 
 T_jup = 3.611 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.181430232189735E-15 -4.90981927634783E-15 -4.071567368817418E-13 1.924481539523419E-14 -1.117531611921244E-13 -7.357439223843211E-16
q -4.90981927634783E-15 1.11820663713094E-14 1.515772096466991E-12 -4.329339735060507E-14 4.056430439144559E-13 2.159556720635375E-15
tp -4.071567368817418E-13 1.515772096466991E-12 1.058826357918603E-8 -2.207583828393601E-13 3.002329968151619E-9 8.238940831149781E-12
node 1.924481539523419E-14 -4.329339735060507E-14 -2.207583828393601E-13 2.218953840203015E-9 -2.206370754618743E-9 1.992482436202283E-12
peri -1.117531611921244E-13 4.056430439144559E-13 3.002329968151619E-9 -2.206370754618743E-9 3.061246180407692E-9 3.59093680481064E-13
i -7.357439223843211E-16 2.159556720635375E-15 8.238940831149781E-12 1.992482436202283E-12 3.59093680481064E-13 2.730304186321454E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 17.51   n/a MPCxxxxx  

216923 (1998 DM12)          Discovered 1998-Feb-23 by Spacewatch at Kitt Peak
Reference: 20090806/Numbers.arcLast Updated: 2009-08-09

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Alternate Designations
 1998 DM12 = 2006 SY305 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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