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 ]  
266646 Zaphod (2008 SD209)
Classification: Main-belt Asteroid          SPK-ID: 2266646
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ hide orbit diagram ]
Orbit Diagram
[ switch to new HTML5 viewer ]

Note: This Java-based orbit viewer will eventually be retired.

Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances. For accurate long-term ephemerides, please instead use our Horizons system.

Note: If the applet is not working, here are some notes that might help.
Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .138037025823848 4.8033e-08  
a 2.78410522929877 3.1409e-08 au
q 2.399795623865746 1.3492e-07 au
i 3.707851173841952 5.4783e-06 deg
node 69.73007225143083 0.00012902 deg
peri 188.1377142069991 0.00013259 deg
M 264.4976661345636 3.2605e-05 deg
tp 2459450.630436934389
(2021-Aug-24.13043693)
0.00015523 TDB
period 1696.785311285749
4.65
2.8714e-05
7.861e-08
d
yr
n .2121659102100595 3.5904e-09 deg/d
Q 3.168414834731796 3.5745e-08 au
  Orbit Determination Parameters
   # obs. used (total)      223  
   data-arc span      6543 days (17.91 yr)  
   first obs. used      2002-03-05  
   last obs. used      2020-02-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .64218  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 12:48:44  

Additional Information
 Earth MOID = 1.38477 au 
 Jupiter MOID = 1.88366 au 
 T_jup = 3.315 
[ 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 16.3   n/a MPO418415  

266646 Zaphod           Discovered 2008 Sept. 28 at the Astronomical Research Observatory, Charleston.
Zaphod Beeblebrox is the ex-Galactic President and confidence trickster in Douglas Adams' book The Hitchhiker's Guide to the Galaxy. Name suggested by M. Johnson and M. Kran.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20121029/MPCPages.arcLast Updated: 2013-03-29

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1977-Jun-12 13:54 00:02 Jupiter 1.90287226923576 1.90287158177217 1.90287295669923 2.24090234137972 2.03258123454216 2443307.078984187 1.94715668006833 87.970474631707 18.0800519423855 -82.8365545716212 2005095.24463319 T 14 CATAB v2.0f-lin.ifort 2020-Feb-25 12:48:45 2020-Feb-25 12:48
2000-Mar-26 10:10 < 00:01 Jupiter 1.88678457517351 1.88678398406432 1.8867851662827 2.38953149611784 2.19363013188773 2451629.923778424 0.810825770816181 86.6192739018592 13.1656482070526 -86.8887525449035 1789717.44444741 T 14 CATAB v2.0f-lin.ifort 2020-Feb-25 12:48:45 2020-Feb-25 12:48
2084-Apr-04 07:17 00:03 Jupiter 1.90615139930054 1.90615065173893 1.90615214686225 2.23765002458582 2.02937239125806 2482319.803393591 3.28735638435385 94.5173506142512 20.3550829867062 -80.4367533474215 2044631.32811693 T 14 CATAB v2.0f-lin.ifort 2020-Feb-25 12:48:45 2020-Feb-25 12:48
2107-Jan-18 00:23 00:04 Jupiter 1.89378498996865 1.89378391769093 1.89378606225165 2.41216421273104 2.21901047446111 2490642.516311764 4.44595324679816 207.851429315699 12.1877340818449 -87.8810797834212 1720825.87679118 T 14 CATAB v2.0f-lin.ifort 2020-Feb-25 12:48:45 2020-Feb-25 12:48
2191-Jan-26 21:35 00:08 Jupiter 1.90547884113507 1.90547701375551 1.90548066851604 2.22306129573836 2.01319708668176 2521332.399475786 8.48638874396184 148.693229138804 33.6889413058472 -67.3732974181898 1634309.00513268 T 14 CATAB v2.0f-lin.ifort 2020-Feb-25 12:48:45 2020-Feb-25 12:48

Alternate Designations
 2008 SD209 = 2005 YK60 = 2007 HP17 = 2008 TS156 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Jul-07 01:08 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin