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181780 (1997 WH6)
Classification: Main-belt Asteroid          SPK-ID: 2181780
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 .1656175398209429 4.303e-08  
a 2.225743585488682 9.0575e-09 au
q 1.857121408587803 9.8252e-08 au
i 2.093322342473073 4.8016e-06 deg
node 186.1296144943816 0.00010763 deg
peri 293.696854400447 0.00010912 deg
M 293.2441753839632 1.5114e-05 deg
tp 2459425.404314417889
(2021-Jul-29.90431442)
5.1179e-05 TDB
period 1212.861254521748
3.32
7.4034e-06
2.027e-08
d
yr
n .2968187817508889 1.8118e-09 deg/d
Q 2.594365762389563 1.0558e-08 au
  Orbit Determination Parameters
   # obs. used (total)      382  
   data-arc span      10004 days (27.39 yr)  
   first obs. used      1993-08-16  
   last obs. used      2021-01-05  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .57893  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:32:01  

Additional Information
 Earth MOID = .874181 au 
 Jupiter MOID = 2.48474 au 
 T_jup = 3.627 
[ 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 17.66   n/a MPCxxxxx  

181780 (1997 WH6)          Discovered 1997-Nov-23 by Spacewatch at Kitt Peak
Reference: 20080420/Numbers.arcLast Updated: 2008-04-23

Alternate Designations
 1997 WH6 = 2005 BW25 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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