Discovery [1] | |
---|---|
Discovered by | K. Reinmuth |
Discovery site | Heidelberg Obs. |
Discovery date | 31 August 1927 |
Designations | |
(1081) Reseda | |
Pronunciation | /rɪˈsiːdə/ [2] |
Named after |
Resēda (mignonette) ( herbaceous plant) [3] |
1927 QF · 1949 UA1 1975 LS | |
Orbital characteristics [1] | |
Epoch 4 September 2017 ( JD 2458000.5) | |
Uncertainty parameter 0 | |
Observation arc | 89.85 yr (32,816 days) |
Aphelion | 3.5567 AU |
Perihelion | 2.6505 AU |
3.1036 AU | |
Eccentricity | 0.1460 |
5.47 yr (1,997 days) | |
167.25 ° | |
0° 10m 49.08s / day | |
Inclination | 4.2029° |
30.443° | |
7.5205° | |
Physical characteristics | |
Dimensions | 31.60±11.05 km
[7] 35.66±0.70 km [8] 37.03±8.13 km [9] 37.810±0.219 km [10] 37.89±0.46 km [11] 37.97 km (derived) [12] 40.462±0.470 km [13] |
7.3002±0.0006
h
[14] 7.30136±0.00001 h [15] | |
Pole
ecliptic latitude | |
0.0326±0.0026
[13] 0.042±0.002 [8] 0.043±0.006 [10] 0.0488 (derived) [12] 0.049±0.008 [11] 0.06±0.02 [9] 0.09±0.07 [7] | |
C (assumed) [12] | |
11.00 [12] [7] [11] · 11.1 [1] · 11.16 [9] · 11.30 [8] [13] | |
1081 Reseda ( prov. designation: 1927 QF) is a dark background asteroid from the outer regions of the asteroid belt. It was discovered on 31 August 1927, by astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in southwest Germany. [4] The asteroid has a rotation period of 7.3 hours and measures approximately 37 kilometers (23 miles) in diameter. It was named after the herbaceous plant Reseda. [3]
Reseda is a non- family asteroid of the main belt's background population when applying the hierarchical clustering method to its proper orbital elements. [5] [6] It orbits the Sun in the outer asteroid belt at a distance of 2.7–3.6 AU once every 5 years and 6 months (1,997 days; semi-major axis of 3.10 AU). Its orbit has an eccentricity of 0.15 and an inclination of 4 ° with respect to the ecliptic. [1] The body's observation arc begins at Heidelberg in September 1927, or 26 days after its official discovery observation. [4]
This minor planet was named after the herbaceous plant Reseda (also known as "weld", "dyer's rocket" and "bastard rocket") a genus of Old World herbs of the mignonette family. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 ( H 102). [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 1054 Forsytia, that were all named after plants, in particular flowering plants (also see list of minor planets named after animals and plants). [16]
Reseda is an assumed carbonaceous C-type asteroid. [12]
In August 2008, a rotational lightcurve of Reseda was obtained from photometric observations. Lightcurve analysis gave a well-defined rotation period of 7.3002 hours with a brightness amplitude of 0.34 magnitude ( U=3). [14]
A 2016-published lightcurve, using modeled photometric data from the Lowell Photometric Database, gave a concurring period of 7.30136 hours, as well as two spin axis of (92.0°, −69.0°) and (256.0°, −76.0°) in ecliptic coordinates (λ, β). [15]
According to the surveys carried out by the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Reseda measures between 31.60 and 40.462 kilometers in diameter and its surface has an albedo between 0.0326 and 0.09. [7] [8] [9] [10] [11] [13] The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0488 and a diameter of 37.97 kilometers based on an absolute magnitude of 11.0. [12]