916 America

916 America

Infobox Planet
minorplanet = yes
width = 25em
bgcolour = #FFFFC0
apsis =
name = 916 America
symbol =


caption =
discovery = yes
discovery_ref = cite web | url=http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=916;orb=1 | title=JPL Small-Body Database Browser - 916 America (1915 S1) | accessdate=2007-12-21]
discoverer = G. N. Neujmin
discovered = 7 August 1915
designations = yes
mp_name = 1915 S1
alt_names =
mp_category =
orbit_ref =
epoch = 27 October 2007 (JDCT 2454400.5)
aphelion = 2.922 AU
perihelion = 1.807 AU
semimajor = 2.365 AU
eccentricity = 0.236
period = 3.64 a
avg_speed =
inclination = 11.097°
asc_node = 329.84°
mean_anomaly =
arg_peri = 41.538°

916 America is a minor planet orbiting the Sun in the main belt between Mars and Jupiter.

It was discovered on 7 August 1915 by the Soviet astronomer Grigory Nikolaevich Neujmin at Simeis, Ukraine. Originally designated 916ΣI, it was renamed '916 America' on 24 February 1923 after the Council of Astronomers at Pulkovo Observatory decided to commemorate "the friendly relations of the astronomical observatories and astronomers". [ [http://adsabs.harvard.edu/abs/1923PA.....31S.364. Asteroid (916) America] (1923). Popular Astronomy, volume 31, page 364.] Another possible reason for the name was as a mark of appreciation for the help given during the famine in Crimea by the American Relief Administration under President Herbert Hoover. [cite book | title=Dictionary of Minor Planet Names | url=http://books.google.com/books?id=KWrB1jPCa8AC&pg=RA1-PA82&lpg=RA1-PA82&dq=%22916+america%22&source=web&ots=BENQ5UH70A&sig=hb1MkEUxTR6M9MHH0jO15y_Olo0 | first=Lutz D. | last= Schmadel | year=2003 | publisher=Springer | isbn=3540002383 | pages=82]

In 1986, assuming that the asteroid was of S-type and that it had a diameter of 15km, the rotational period was measured to be 38 hours.cite journal | url=http://articles.adsabs.harvard.edu//full/1986acm..proc...81D/0000084.000.html | title=A Photoelectric Program for Small and Unusual Asteroids | last=Dimartino | first=M. | journal=Asteroids, comets, meteors II; Proceedings of the International Meeting, Uppsala, Sweden, June 3-6, 1985. Uppsala, Sweden, Astronomiska Observatoriet | year=1986] Observations by the Infrared Astronomical Satellite have since shown that it has a diameter of 33.2±1.3 km, with an absolute magnitude of 11.20 and an albedo of 0.053±0.004.

References

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