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1054 Forsytia

Dark background asteroid

Field	Value
minorplanet	yes
name	1054 Forsytia
background	#D6D6D6
image	001054-asteroid shape model (1054) Forsytia.png
caption	Shape model of Forsytia from its lightcurve
discovery_ref
discoverer	K. Reinmuth
discovery_site	Heidelberg Obs.
discovered	20 November 1925
mpc_name	(1054) Forsytia
alt_names	1925 WD1962 DD
A907 EA
pronounced
named_after	Forsythia (flowering plant)
mp_category	main-belt(outer)
background
orbit_ref
epoch	4 September 2017 (JD 2458000.5)
uncertainty	0
observation_arc	110.32 yr (40,295 days)
aphelion	3.3198 AU
perihelion	2.5284 AU
semimajor	2.9241 AU
eccentricity	0.1353
period	5.00 yr (1,826 days)
mean_anomaly	165.01°
mean_motion	/ day
inclination	10.849°
asc_node	85.888°
arg_peri	294.19°
dimensions	km
45.42 km (derived)
km
km
km
km
km
rotation	h
albedo
0.0592 (derived)

spectral_type	C (assumed)
abs_magnitude	10.1210.3010.4010.4610.87

A907 EA background 45.42 km (derived) km km km km km

0.0592 (derived)

1054 Forsytia is a dark background asteroid, approximately 46 kilometers in diameter, from the outer regions of the asteroid belt. It was discovered on 20 November 1925, by astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in southwest Germany and assigned provisional designation . It is named after the flowering plant forsythia, and marks the beginning of a sequence of 28 thematically named asteroids by the discoverer.

Orbit and classification

Forsytia is a non-family asteroid from the main belt's background population. It orbits the Sun in the outer asteroid belt at a distance of 2.5–3.3 AU once every 5.00 years (1,826 days; semi-major axis of 2.92 AU). Its orbit has an eccentricity of 0.14 and an inclination of 11° with respect to the ecliptic. The asteroid was first observed as at Heidelberg in March 1907. The body's observation arc begins with its official discovery observation in November 1925.

Naming

This minor planet was named after forsythia, a genus of flowering shrubs in the family Oleaceae. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 100).

Reinmuth's flowers

Due to his many discoveries, Karl Reinmuth submitted a large list of 66 newly named asteroids in the early 1930s. The list covered his discoveries with numbers between and . This list also contained a sequence of 28 asteroids, starting with this asteroid, that were all named after plants, in particular flowering plants (also see list of minor planets named after animals and plants).

Physical characteristics

Forsytia is an assumed carbonaceous C-type asteroid.

Rotation period

In March 2002, a rotational lightcurve of Forsytia was obtained from photometric observations by American amateur astronomer John Gross at his Sonoran Skies Observatory (G94) in Arizona. Lightcurve analysis gave a well-defined rotation period of 7.650 hours with a brightness amplitude of 0.23 magnitude ().

Diameter and albedo

According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Forsytia measures between 42.867 and 53.04 kilometers in diameter and its surface has an albedo between 0.035 and 0.0750. The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0592 and a diameter of 45.42 kilometers based on an absolute magnitude of 10.4.

References

''Sunset Western Garden Book,'' 1995:606–607

Info: Wikipedia Source

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background-asteroids discoveries-by-karl-wilhelm-reinmuth named-minor-planets astronomical-objects-discovered-in-1925

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