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2218 Wotho (1975 AK)
Classification: Main-belt Asteroid          SPK-ID: 2002218
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 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1572672281979495 3.4784e-08  
a 3.048659175297485 1.6584e-08 au
q 2.569204997078203 1.0769e-07 au
i 14.94304036026875 4.4197e-06 deg
node 96.47312400104323 1.2981e-05 deg
peri 323.9305841002566 1.8412e-05 deg
M 283.4411497788453 1.5153e-05 deg
tp 2459613.980127297270
(2022-Feb-03.48012730)
8.367e-05 TDB
period 1944.293120874044
5.32
1.5865e-05
4.344e-08
d
yr
n .1851572667387541 1.5109e-09 deg/d
Q 3.528113353516767 1.9193e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2629  
   data-arc span      32515 days (89.02 yr)  
   first obs. used      1931-12-05  
   last obs. used      2020-12-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41268  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 13:29:43  

Additional Information
 Earth MOID = 1.59798 au 
 Jupiter MOID = 1.80861 au 
 T_jup = 3.167 
[ 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 11.31   n/a E2021B10  
diameter diameter 28.158 km 0.118 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 4.9267 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Behrend, R. (2012) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.048   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

2218 Wotho (1975 AK)          Discovered 1975-Jan-10 by Wild, P. at Zimmerwald
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1975 AK = 1931 XU = 1970 ED1 = 1975 BG1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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