1450 Raimonda
Background asteroid
From Wikipedia, the free encyclopedia
1450 Raimonda, provisional designation 1938 DP, is a background asteroid from the central regions of the asteroid belt, approximately 15 kilometers in diameter. It was discovered on 20 February 1938, by astronomer Yrjö Väisälä at the Iso-Heikkilä Observatory in Turku, Finland.[12] The asteroid was named after Dutch astronomer Jean Jacques Raimond, Jr.[2]
.png)
Lightcurve-based 3D-model of Raimonda | |
| Discovery[1] | |
|---|---|
| Discovered by | Y. Väisälä |
| Discovery site | Turku Obs. |
| Discovery date | 20 February 1938 |
| Designations | |
| (1450) Raimonda | |
Named after | Jean Jacques Raimond, Jr.[2] (Dutch astronomer) |
| 1938 DP · 1934 GJ A915 TF | |
| main-belt · (middle)[3] background[4] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 101.96 yr (37,242 days) |
| Aphelion | 3.0591 AU |
| Perihelion | 2.1642 AU |
| 2.6117 AU | |
| Eccentricity | 0.1713 |
| 4.22 yr (1,542 days) | |
| 351.45° | |
| 0° 14m 0.6s / day | |
| Inclination | 4.8635° |
| 74.927° | |
| 13.427° | |
| Physical characteristics | |
| Dimensions | 14.75 km (derived)[3] 14.76±4.56 km[5] 14.88±0.9 km[6] 18.481±0.084 km[7] 18.700±0.068 km[8] 20.80±1.15 km[9] |
| 12.6344 h[10] 12.66 h[11] | |
| 0.074±0.009[9] 0.0878±0.0170[8] 0.09±0.10[5] 0.094±0.019[7] 0.0976 (derived)[3] 0.1387±0.019[6] | |
| S (assumed)[3] | |
| 11.90[6][8][9] · 12.30[1][3][5] | |
Orbit and classification
Raimonda is a non-family asteroid of the main belt's background population.[4] It orbits the Sun in the central asteroid belt at a distance of 2.2â3.1 AU once every 4 years and 3 months (1,542 days). Its orbit has an eccentricity of 0.17 and an inclination of 5° with respect to the ecliptic.[1]
The body's observation arc begins with its first identification as A915 TF at Heidelberg Observatory in October 1915, more than 22 years prior to its official discovery observation at Turku.[12]
Physical characteristics
Raimonda is an assumed stony S-type asteroid,[3] despite its rather low albedo.
Rotation period and poles
In December 2004, a rotational lightcurve of Raimonda was obtained from photometric observations at the Oakley (916) and Tenagra Observatory (848). Lightcurve analysis gave a rotation period of 12.66 hours with a brightness amplitude of 0.64 (or 0.57 at LCDB) magnitude (U=2), indicative of an elongated shape.[11]
In 2013, a lightcurve was modeled from photometric data collected by the Uppsala Asteroid Photometric Catalogue, the Palomar Transient Factory survey, and individual observers, as well as sparse-in-time photometry from the United States Naval Observatory Flagstaff Station, the Catalina Sky Survey in Tucson, and the Roque de los Muchachos Observatory at La Palma. Modelling gave a similar period 12.6344 hours. The study also determined two spin axis of (231.0°, â56.0°) and (71.0°, â60.0°) in ecliptic coordinates (λ, β).[10]
Diameter and albedo
According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Raimonda measures between 14.76 and 20.80 kilometers in diameter and its surface has an albedo between 0.074 and 0.1387.[5][6][7][8][9]
The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0976 and a diameter of 14.75 kilometers based on an absolute magnitude of 12.3.[3]
Naming
This minor planet was named after Jean Jacques Raimond, Jr. (1903â1961), a Dutch astronomer who was the president of the Dutch Astronomical Society (Dutch: Nederlandse Vereniging voor Weer- en Sterrenkunde; Netherlands Association for Meteorology and Astronomy) and director of the Zeiss planetarium at The Hague.[2]
The naming was suggested by Belgian astronomer Jean Meeus, and the official naming citation was published by the Minor Planet Center on 1 February 1965 (M.P.C. 2347).[13] The lunar crater Raimond was also named in his honor.[2]
