Discovery [1] | |
---|---|
Discovered by | K. Reinmuth |
Discovery site | Heidelberg Obs. |
Discovery date | 20 November 1925 |
Designations | |
(1054) Forsytia | |
Pronunciation | /fɔːrˈsɪtiə/ [2] |
Named after | Forsythia ( flowering plant) [3] |
1925 WD · 1962 DD A907 EA | |
main-belt · (
outer)
[4] background [5] | |
Orbital characteristics [1] | |
Epoch 4 September 2017 ( JD 2458000.5) | |
Uncertainty parameter 0 | |
Observation arc | 110.32 yr (40,295 days) |
Aphelion | 3.3198 AU |
Perihelion | 2.5284 AU |
2.9241 AU | |
Eccentricity | 0.1353 |
5.00 yr (1,826 days) | |
165.01 ° | |
0° 11m 49.56s / day | |
Inclination | 10.849° |
85.888° | |
294.19° | |
Physical characteristics | |
Dimensions | 42.867±11.18 km
[6] 45.42 km (derived) [4] 45.47±4.3 km [7] 46.40±13.38 km [8] 46.69±15.08 km [9] 47.780±3.344 km [10] 53.04±0.71 km [11] |
7.650±0.001 h [12] | |
0.035±0.013
[10] 0.04±0.07 [8] 0.048±0.002 [11] 0.05±0.03 [9] 0.0592 (derived) [4] 0.0648±0.014 [7] 0.0750±0.0441 [6] | |
C (assumed) [4] | |
10.12 [6] · 10.12±0.51 [13] · 10.30 [7] [11] · 10.40 [1] [4] [9] · 10.46 [8] · 10.87 [10] | |
1054 Forsytia /fɔːrˈsɪtiə/ 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 1925 WD. [14] It is named after the flowering plant forsythia, and marks the beginning of a sequence of 28 thematically named asteroids by the discoverer. [3]
Forsytia is a non- family asteroid from the main belt's background population. [5] 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. [1] The asteroid was first observed as A907 EA at Heidelberg in March 1907. The body's observation arc begins with its official discovery observation in November 1925. [14]
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). [3]
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 (1009) and (1200). 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). [3]
Forsytia is an assumed carbonaceous C-type asteroid. [4]
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 ( U=3). [12]
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. [6] [7] [8] [9] [10] [11] 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. [4]
Discovery [1] | |
---|---|
Discovered by | K. Reinmuth |
Discovery site | Heidelberg Obs. |
Discovery date | 20 November 1925 |
Designations | |
(1054) Forsytia | |
Pronunciation | /fɔːrˈsɪtiə/ [2] |
Named after | Forsythia ( flowering plant) [3] |
1925 WD · 1962 DD A907 EA | |
main-belt · (
outer)
[4] background [5] | |
Orbital characteristics [1] | |
Epoch 4 September 2017 ( JD 2458000.5) | |
Uncertainty parameter 0 | |
Observation arc | 110.32 yr (40,295 days) |
Aphelion | 3.3198 AU |
Perihelion | 2.5284 AU |
2.9241 AU | |
Eccentricity | 0.1353 |
5.00 yr (1,826 days) | |
165.01 ° | |
0° 11m 49.56s / day | |
Inclination | 10.849° |
85.888° | |
294.19° | |
Physical characteristics | |
Dimensions | 42.867±11.18 km
[6] 45.42 km (derived) [4] 45.47±4.3 km [7] 46.40±13.38 km [8] 46.69±15.08 km [9] 47.780±3.344 km [10] 53.04±0.71 km [11] |
7.650±0.001 h [12] | |
0.035±0.013
[10] 0.04±0.07 [8] 0.048±0.002 [11] 0.05±0.03 [9] 0.0592 (derived) [4] 0.0648±0.014 [7] 0.0750±0.0441 [6] | |
C (assumed) [4] | |
10.12 [6] · 10.12±0.51 [13] · 10.30 [7] [11] · 10.40 [1] [4] [9] · 10.46 [8] · 10.87 [10] | |
1054 Forsytia /fɔːrˈsɪtiə/ 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 1925 WD. [14] It is named after the flowering plant forsythia, and marks the beginning of a sequence of 28 thematically named asteroids by the discoverer. [3]
Forsytia is a non- family asteroid from the main belt's background population. [5] 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. [1] The asteroid was first observed as A907 EA at Heidelberg in March 1907. The body's observation arc begins with its official discovery observation in November 1925. [14]
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). [3]
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 (1009) and (1200). 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). [3]
Forsytia is an assumed carbonaceous C-type asteroid. [4]
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 ( U=3). [12]
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. [6] [7] [8] [9] [10] [11] 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. [4]