1130 Skuld
Florian asteroid
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1130 Skuld, provisional designation 1929 RC, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 10 kilometers in diameter. It was named after Skuld from Norse mythology.[2]
_Skuld.png)
Modelled shape of Skuld from its lightcurve | |
| Discovery[1] | |
|---|---|
| Discovered by | K. Reinmuth |
| Discovery site | Heidelberg Obs. |
| Discovery date | 2 September 1929 |
| Designations | |
| (1130) Skuld | |
Named after | Skuld (Norse mythology)[2] |
| 1929 RC · 1928 FJ 1949 UD · 1962 LA A906 VC | |
| main-belt · Flora[3] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 110.38 yr (40,316 days) |
| Aphelion | 2.6701 AU |
| Perihelion | 1.7864 AU |
| 2.2282 AU | |
| Eccentricity | 0.1983 |
| 3.33 yr (1,215 days) | |
| 173.35° | |
| 0° 17m 46.68s / day | |
| Inclination | 2.1677° |
| 216.13° | |
| 113.81° | |
| Physical characteristics | |
| Dimensions | 9.63±0.44 km[4] 9.99 km (derived)[3] 10.125±0.092 km[5] 10.24±0.64 km[6] 11.009±0.091 km[7] |
| 4.73±0.02 h[8] 4.807±0.002 h[9] 4.8079±0.0005 h[10] 4.810 h[a] | |
| 0.1995±0.0461[7] 0.24 (assumed)[3] 0.244±0.033[6] 0.302±0.031[4] | |
| S[3] | |
| 12.0[1][4] · 12.10[6] · 12.17[3][7] · 12.17±0.02[9] | |
Discovery
Skuld was discovered on 2 September 1929, by German astronomer Karl Reinmuth at Heidelberg Observatory in southwest Germany.[11] The body was independently discovered by astronomers and fellow countrymen Arnold Schwassmann and Arno Wachmann at the Hamburger Bergedorf Observatory ten nights later.[2]
It was first identified as A906 VC at Heidelberg in 1906, extending the asteroid's observation arc by 23 years prior to its official discovery observation.[11]
Orbit and classification
Skuld is a member of the Flora family, one of the largest groups of stony S-type asteroids in the main-belt. It orbits the Sun in the inner main-belt at a distance of 1.8–2.7 AU once every 3 years and 4 months (1,215 days). Its orbit has an eccentricity of 0.20 and an inclination of 2° with respect to the ecliptic.[1]
Naming
This minor planet was named after Skuld, one of the three Norns in Norse mythology. The asteroids 167 Urda and 621 Werdandi are named after the other two Norns.[2] Naming citation was first mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 110).[2]
Physical characteristics
Rotation period
In January 2004, the first rotational lightcurves of Skuld were obtained by Henk de Groot and by a group of Polish and French astronomers. Lightcurve analysis gave a rotation period of 4.73 and 4.8079 hours with a brightness variation of 0.46 and 0.40 magnitude, respectively (U=2+/3-).[8][10]
In 2009 and 2011, astronomers Robert Buchheim and Larry Robinson obtained two well-defined lightcurves from photometric observations. They gave a refined period of 4.810 and 4.807 hours with an amplitude of 0.50 and 0.26 magnitude, respectively (U=3/3).[9][a]
Diameter and albedo
According to the surveys carried out by the Japanese Akari satellite and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Skuld measures between 9.63 and 11.009 kilometers in diameter and its surface has an albedo between 0.1995 and 0.302.[4][5][6][7] The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.24 – derived from 8 Flora, the largest member and namesake of this orbital family – and calculates a diameter of 9.99 kilometers with an absolute magnitude of 12.17.[3]
Notes
- Robinson (2011) web: rotation period 4.810 hours with a brightness amplitude of 0.5 mag. Summary figures for (1130) Skuld at 2=Collaborative Asteroid Lightcurve Link (CALL)
