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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 | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .237116518588917 4.0212e-08  
a 2.364659777922268 6.1128e-09 au
q 1.803959883734098 9.5474e-08 au
i 11.09386632078238 4.0135e-06 deg
node 329.7688358476154 1.8243e-05 deg
peri 41.59717840677869 1.9195e-05 deg
M 265.3975862498615 6.8967e-06 deg
tp 2459349.520663564942
(2021-May-15.02066357)
2.6e-05 TDB
period 1328.163139845838
3.64
5.1501e-06
1.41e-08
d
yr
n .2710510397403333 1.051e-09 deg/d
Q 2.925359672110438 7.5622e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2764  
   data-arc span      35254 days (96.52 yr)  
   first obs. used      1924-01-29  
   last obs. used      2020-08-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .39173  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:24:40  

Additional Information
 Earth MOID = .817902 au 
 Jupiter MOID = 2.5912 au 
 T_jup = 3.486 
[ 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 11.5   n/a MPO384754  
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. 2019-August); 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

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