![]()
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] | |
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]
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 2.2–3.1 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]
Raimonda is an assumed stony S-type asteroid, [3] despite its rather low albedo.
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°, −56.0°) and (71.0°, −60.0°) in ecliptic coordinates (λ, β). [10]
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]
This minor planet was named after Jean Jacques Raimond, Jr. (1903–1961), 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]