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JPL Small-Body Database Browser
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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1577375710462126 3.9426e-08  
a 3.05240268593388 1.8199e-08 au
q 2.570924100399735 1.1909e-07 au
i 14.95385905173759 4.6716e-06 deg
node 96.49826168667137 1.4834e-05 deg
peri 323.4278480387943 1.9744e-05 deg
M 247.0194424805126 1.5102e-05 deg
tp 2459611.811238656236
(2022-Feb-01.31123866)
8.4693e-05 TDB
period 1947.875375621917
5.33
1.742e-05
4.769e-08
d
yr
n .184816751885402 1.6529e-09 deg/d
Q 3.533881271468025 2.107e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2264  
   data-arc span      32287 days (88.40 yr)  
   first obs. used      1931-12-05  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43274  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:36:27  

Additional Information
 Earth MOID = 1.60059 au 
 Jupiter MOID = 1.80542 au 
 T_jup = 3.166 
[ 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 11.2   n/a MPO347536  
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. 2019-August); 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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