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916 America (1915 S1)
Classification: Main-belt Asteroid          SPK-ID: 2000916
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2354701583928324 6.576e-08  
a 2.364853492136492 1.5149e-08 AU
q 1.808001065767269 1.5617e-07 AU
i 11.09388413220252 7.875e-06 deg
node 329.812582163392 2.8705e-05 deg
peri 41.57540470139413 3.1337e-05 deg
M 29.09189204473531 1.4158e-05 deg
tp 2456693.156870155403
(2014-Feb-04.65687016)
5.1736e-05 JED
period 1328.326348957698
3.64
1.2764e-05
3.495e-08
d
yr
n .2710177361779222 2.6042e-09 deg/d
Q 2.921705918505715 1.8716e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1098  
   data-arc span      32800 days (89.80 yr)  
   first obs. used      1924-01-29  
   last obs. used      2013-11-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49615  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Mar-22 10:35:21  

Additional Information
 Earth MOID = .820524 AU 
 T_jup = 3.486 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.4 mag n/a MPO263352  
diameter diameter 33.23 km 1.3 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 16
rotation period rot_per 38. h n/a Asteroid Lightcurve DataBase (Rev. 2013-Sep-12) Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Di Martino, M. (1986) in Asteroids, Comets, Meteors II. C.-I. Lagerkvist, B.A. Lindblad, M. Lundstedt, H. Rickman, eds. Uppsala, pp. 81-84.]
geometric albedo albedo 0.0530   0.004 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 16

916 America (1915 S1)          Discovered 1915-Aug-07 by Neujmin, G. at Simeis (094)
Discovered at Simeis during the First World War while Simeis was not in communication with the Rechen-Institut for long periods of time were given provisional designations containing the Greek letter SIGMA. These are here abbreviated S.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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