Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1577375573166713 3.6539e-08  
a 3.052402680116199 1.7133e-08 au
q 2.570924137407809 1.1216e-07 au
i 14.95385784979833 4.5956e-06 deg
node 96.49827006110822 1.3724e-05 deg
peri 323.42784048958 1.895e-05 deg
M 247.0194438699002 1.5038e-05 deg
tp 2459611.811229390907
(2022-Feb-01.31122939)
8.4175e-05 TDB
period 1947.875370053131
5.33
1.64e-05
4.49e-08
d
yr
n .184816752413775 1.556e-09 deg/d
Q 3.533881222824589 1.9835e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2432  
   data-arc span      32387 days (88.67 yr)  
   first obs. used      1931-12-05  
   last obs. used      2020-08-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42015  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:47:12  

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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Sep-23 20:44 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin