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916 America (A915 PE)
Classification: Main-belt Asteroid          SPK-ID: 2000916
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer 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.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2365934014642286 1.283e-08  
a 2.364378577411167 5.9158e-09 au
q 1.804982207432305 3.0734e-08 au
i 11.09665870568189 9.7196e-07 deg
node 329.7548544524496 4.366e-06 deg
peri 41.53405154965026 5.1525e-06 deg
M 12.75939852574001 6.2819e-06 deg
tp 2459349.434611048871
(2021-May-14.93461105)
2.3069e-05 TDB
period 1327.926233217466
3.64
4.9838e-06
1.364e-08
d
yr
n .271099396182382 1.0175e-09 deg/d
Q 2.923774947390029 7.3154e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2926  
   data-arc span      35610 days (97.49 yr)  
   first obs. used      1924-01-29  
   last obs. used      2021-07-28  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .38683  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 07:08:22  

Additional Information
 Earth MOID = .818054 au 
 Jupiter MOID = 2.59394 au 
 T_jup = 3.486 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.52   n/a E2021B10  
diameter diameter 33.23 km 1.3 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 16
rotation period rot_per 37.294 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 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.]
[Behrend, R. (2017) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Polakis, T. (2018) Minor Planet Bull. 45, 112-115.]
geometric albedo albedo 0.0530   0.004 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 16

916 America (A915 PE)          Discovered 1915-Aug-07 by Neujmin, G. at Simeis
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
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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