![]() 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] | |
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 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]
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]
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]
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]
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]