1530 Rantaseppä
| Discovery | |
|---|---|
| Discovered by | Y. Väisälä |
| Discovery site | Turku Obs. |
| Discovery date | 16 September 1938 |
| Designations | |
| MPC designation | (1530) Rantaseppä |
|
Named after
|
Hilkka Rantaseppä-Helenius (Finnish astronomer) |
| 1938 SG | |
| main-belt · Flora | |
| Orbital characteristics | |
| Epoch 16 February 2017 (JD 2457800.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 78.31 yr (28,604 days) |
| Aphelion | 2.6963 AU |
| Perihelion | 1.8001 AU |
| 2.2482 AU | |
| Eccentricity | 0.1993 |
| 3.37 yr (1,231 days) | |
| 80.951° | |
| 0° 17m 32.64s / day | |
| Inclination | 4.4187° |
| 285.88° | |
| 84.664° | |
| Physical characteristics | |
| Dimensions |
5.044±0.058 km 5.195±0.054 km 5.93 km (calculated) |
| 3.5258±0.0005 h | |
| 0.24 (assumed) 0.3791±0.0941 0.400±0.028 |
|
| S | |
| 13.1 · 13.3 | |
1530 Rantaseppä, provisional designation 1938 SG, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 5 kilometers in diameter. Discovered by Yrjö Väisälä at Turku Observatory in 1938, it was later named after Finnish astronomer Hilkka Rantaseppä-Helenius.
Rantaseppä was discovered on 16 September 1938, by Finnish astronomer Yrjö Väisälä at Turku Observatory in Southwest Finland. Two night later, the body was independently discovered by Belgian astronomer Eugène Delporte at Uccle Observatory. The body's observation arc begins at Uccle, one day after its official discovery observation at Turku.
Rantaseppä is a member of the Flora family of stony asteroids, one of the largest families of the main belt. It orbits the Sun at a distance of 1.8–2.7 AU once every 3 years and 4 months (1,231 days). Its orbit has an eccentricity of 0.20 and an inclination of 4° with respect to the ecliptic.
In December 2016, a rotational lightcurve of Rantaseppä was obtained from photometric observations by Czech astronomer Petr Pravec at the Ondřejov Observatory and its photometric program of near-Earth objects. Lightcurve analysis gave a rotation period of 3.5258 hours with a relatively high brightness variation of 0.41 magnitude, which is indicative of a non-spheroidal shape (U=3).
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