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823 Sisigambis (1916 ZG)
Classification: Main-belt Asteroid          SPK-ID: 2000823
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

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Orbit Diagram
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 2-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 has stopped working because of a recent Java upgrade, here is a possible workaround.
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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09008784948103234 4.0249e-08  
a 2.221220324416389 6.6005e-09 au
q 2.021115362166155 9.0112e-08 au
i 3.645633023695904 4.0819e-06 deg
node 255.0282306485291 7.8871e-05 deg
peri 218.602029014432 8.3384e-05 deg
M 176.610007903178 2.522e-05 deg
tp 2457007.303344099711
8.4535e-05 JED
period 1209.165882837047
n .297725899407067 1.3271e-09 deg/d
Q 2.421325286666622 7.1951e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1612  
   data-arc span      36540 days (100.04 yr)  
   first obs. used      1916-04-01  
   last obs. used      2016-04-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .54148  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 12:30:22  

Additional Information
 Earth MOID = 1.03763 au 
 Jupiter MOID = 2.65835 au 
 T_jup = 3.641 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.2 mag n/a MPO337249  
diameter diameter 16.63 km 1.4 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 2
rotation period rot_per 146. h n/a LCDB (Rev. 2016-February); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Behrend, R. (2004) Observatoire de Geneve web site,]
[Hanus, J.; Durech, J.; Broz, M.; Warner, B.D.; et al. (2011) Astron. Astrophys. 530, A134.]
geometric albedo albedo 0.1793   0.034 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 2

823 Sisigambis (1916 ZG)          Discovered 1916-Mar-31 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1916 ZG = 1937 QE = 1939 FA1 = 1969 FN = 2005 AR82 = A913 JB 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
FirstGov 2016-May-04 19:18 UT
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