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541728 (2011 WA99)
Classification: Main-belt Asteroid          SPK-ID: 2541728
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 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2756818422505568 8.4454e-07  
a 2.523208553669362 6.6868e-08 au
q 1.82760577121143 2.0917e-06 au
i 10.9064214538264 1.4378e-05 deg
node 109.8197511609454 0.00016468 deg
peri 270.5382522709322 0.0010437 deg
M 108.5991746169565 0.00047934 deg
tp 2458758.876502399527
(2019-Oct-02.37650240)
0.0019664 TDB
period 1463.95642229261
4.01
5.8195e-05
1.593e-07
d
yr
n .2459089591179406 9.7754e-09 deg/d
Q 3.218811336127295 8.5303e-08 au
  Orbit Determination Parameters
   # obs. used (total)      119  
   data-arc span      4407 days (12.07 yr)  
   first obs. used      2007-11-04  
   last obs. used      2019-11-28  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      1  
   norm. resid. RMS      .44196  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 20:24:16  

Additional Information
 Earth MOID = .867732 au 
 Jupiter MOID = 2.34959 au 
 T_jup = 3.377 
[ 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 18.5   n/a MPO504470  

541728 (2011 WA99)          Discovered 2011-Oct-20 by Pan-STARRS 1 at Haleakala
Reference: Last Updated: 2019-12-13

Alternate Designations
 2011 WA99 = 2011 WB99 = 2015 TO331 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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