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
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.


JPL Small-Body Database Browser
Search: [ help ]  
233693 (2008 SM18)
Classification: Main-belt Asteroid          SPK-ID: 2233693
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2454171002103696 5.4434e-08  
a 2.801919845819106 2.2911e-08 au
q 2.114280802236295 1.5717e-07 au
i 9.44605152697806 5.2355e-06 deg
node 154.5197515839331 4.1831e-05 deg
peri 291.1800087662235 4.4266e-05 deg
M 15.74562639933095 1.1888e-05 deg
tp 2458525.572812732496
(2019-Feb-11.07281273)
5.6558e-05 TDB
period 1713.097131368966
4.69
2.1012e-05
5.753e-08
d
yr
n .2101457024286286 2.5775e-09 deg/d
Q 3.489558889401916 2.8534e-08 au
  Orbit Determination Parameters
   # obs. used (total)      329  
   data-arc span      6528 days (17.87 yr)  
   first obs. used      2001-03-29  
   last obs. used      2019-02-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60376  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 11:16:50  

Additional Information
 Earth MOID = 1.15181 au 
 Jupiter MOID = 1.83591 au 
 T_jup = 3.261 
[ 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 16.2   n/a MPO418248  
diameter diameter 2.498 km 0.433 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.094   0.015 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

233693 (2008 SM18)          Discovered 2008-Sep-19 by Spacewatch at Kitt Peak
Reference: 20100228/Numbers.arcLast Updated: 2010-03-03

[ show close-approach data ]
Alternate Designations
 2008 SM18 = 2004 YV4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2019-Dec-07 06:54 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin