1019 Strackea
Hungaria asteroid
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1019 Strackea, provisional designation 1924 QN, is a stony Hungaria asteroid of the inner asteroid belt, approximately 8 kilometers in diameter. It was discovered on 3 March 1924, by astronomer Karl Reinmuth at Heidelberg Observatory in southwest Germany.[16] It is named for German astronomer Gustav Stracke.[2]
| Discovery[1] | |
|---|---|
| Discovered by | K. Reinmuth |
| Discovery site | Heidelberg Obs. |
| Discovery date | 3 March 1924 |
| Designations | |
| (1019) Strackea | |
Named after | Gustav Stracke[2] (German astronomer) |
| 1924 QN | |
| main-belt[1] · (inner) Hungaria[3][4] · background[5] | |
| Orbital characteristics[1] | |
| Epoch 16 February 2017 (JD 2457800.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 92.08 yr (33,632 days) |
| Aphelion | 2.0477 AU |
| Perihelion | 1.7756 AU |
| 1.9117 AU | |
| Eccentricity | 0.0712 |
| 2.64 yr (965 days) | |
| 316.21° | |
| 0° 22m 22.44s / day | |
| Inclination | 26.977° |
| 144.42° | |
| 121.85° | |
| Physical characteristics | |
| Dimensions | 7.169±0.263 km[6] 7.44±1.36 km[7] 8.37±0.7 km (IRAS:3)[8] 8.79±0.23 km[9] |
| 3.832 h (incorrect)[10] 4.044±0.002 h[11] 4.04659±0.00006 h[12] 4.047±0.001 h[13] 4.047±0.005 h[14] 4.05±0.01 h[12] 4.052±0.002 h[15] | |
| 0.206±0.012[9] 0.2236±0.040 (IRAS:3)[8] 0.305±0.029[6] 0.39±0.13[7] | |
| Tholen = S[1][3] BâV = 0.953[1] UâB = 0.513[1] | |
| 12.63[1][3][6][7][8][9] | |
Classification and orbit
Strackea is a member of the Hungaria group, a dynamical group forming the innermost dense concentration of asteroids in the Solar System.[4] It is, however, a non-family asteroid of the background population, and not a member of the (collisional) Hungaria family.[5] It orbits the Sun at a distance of 1.8â2.0 AU once every 2 years and 8 months (965 days). Its orbit has an eccentricity of 0.07 and an inclination of 27° with respect to the ecliptic.[1] The body's observation arc begins with its official discovery observation at Heidelberg in 1924.[16]
Physical characteristics
In the Tholen classification, Strackea is a common, stony S-type asteroid.[1][3]
Lightcurve
The first valid rotational lightcurve of Strackea with a period of 4.05 hours and a brightness variation of 0.17 magnitude was obtained by French amateur astronomer Laurent Bernasconi in February 2006 (U=2).[12] Since then, several well-defined lightcurves with a period between 4.044 and 4.052 hours and an amplitude of 0.15 to 0.25 magnitude were obtained by astronomers Brian Warner,[a] Richard Schmidt, as well as by the group of astronomers Pierre Antonini, Raoul Behrend, Roberto Crippa and Federico Manzini (U=3/3-/3-/3/3).[11][12][13][14][15]
Diameter and albedo
According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite, and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Strackea measures between 7.169 and 8.79 kilometers in diameter and its surface has an albedo between 0.206 and 0.39.[6][7][8][9] The Collaborative Asteroid Lightcurve Link adopts the results obtained by IRAS, that is, an albedo of 0.2236 and a diameter of 8.37 kilometers with an absolute magnitude of 12.63.[3]
Naming
This minor planet was named after German astronomer Gustav Stracke (1887â1943), who was in charge of the minor planet department at the Berlin-based Astronomical Calculation Institute, despite his wish that he not be honored in this fashion.[2] Previously, the discoverer had circumvented Stracke's wish by accordingly naming a consecutively numbered sequence of asteroids, so that their first letters form the name "G. Stracke". These minor planets, in the number range from 1227 to 1234, were:[17]
Naming citation was first published by Paul Herget in The Names of the Minor Planets in 1955 (H 97).[2]
Notes
- Lightcurve plot of (1019) Strackea, Warner (2014) Palmer Divide Station. Summary figures at Center for Solar System Studies
