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181999 (1999 WG15)
Classification: Main-belt Asteroid          SPK-ID: 2181999
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1936125026095762 5.5422e-08  
a 2.262758662565741 1.2248e-08 au
q 1.82466029510489 1.253e-07 au
i 2.150836772138268 5.5661e-06 deg
node 61.84527650456759 0.00016403 deg
peri 268.8868617220527 0.00016477 deg
M 114.5163726561046 1.6692e-05 deg
tp 2458805.023334656376
(2019-Nov-17.52333466)
5.6664e-05 TDB
period 1243.242308689343
3.40
1.0094e-05
2.764e-08
d
yr
n .2895654350594946 2.351e-09 deg/d
Q 2.700857030026592 1.4619e-08 au
  Orbit Determination Parameters
   # obs. used (total)      279  
   data-arc span      7768 days (21.27 yr)  
   first obs. used      1999-10-03  
   last obs. used      2021-01-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .61533  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:32:56  

Additional Information
 Earth MOID = .813514 au 
 Jupiter MOID = 2.6514 au 
 T_jup = 3.593 
[ show covariance matrix ]

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 17.25   n/a MPCxxxxx  

181999 (1999 WG15)          Discovered 1999-Nov-29 by Spacewatch at Kitt Peak
Reference: 20080420/Numbers.arcLast Updated: 2008-04-23

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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