![]() Shape model of Jacqueline from its lightcurve | |
Discovery [1] | |
---|---|
Discovered by | B. Jekhovsky |
Discovery site | Algiers Obs. |
Discovery date | 4 February 1924 |
Designations | |
(1017) Jacqueline | |
Named after | Jacqueline Zadoc-Kahn Eisenmann [2] (discoverer's pupil) |
1924 QL ·1929 LG 1953 AC ·A924 ED A924 CH | |
Orbital characteristics [3] | |
Epoch 31 May 2020 (JD 2459000.5) | |
Uncertainty parameter 0 | |
Observation arc | 92.01 yr (33,607 d) |
Aphelion | 2.8098 AU |
Perihelion | 2.4017 AU |
2.6058 AU | |
Eccentricity | 0.0783 |
4.21 yr (1,536 d) | |
292.84° | |
0° 14m 3.48s / day | |
Inclination | 7.9280° |
118.94° | |
68.145° | |
Physical characteristics | |
7.87±0.01 h [9] | |
Pole ecliptic latitude | |
SMASS = C [3] | |
11.1 [1] [3] | |
1017 Jacqueline (prov. designation: A924 CHor1924 QL) is a dark background asteroid from the central regions of the asteroid belt. It was discovered on 4 February 1924, by Russian-French astronomer Benjamin Jekhowsky at the Algiers Observatory, Algeria, in North Africa. [1] The carbonaceous C-type asteroid has a rotation period of 7.87 hours with a high brightness amplitude of 0.6 magnitude and measures approximately 39 kilometers (24 miles) in diameter. [10] It was named after the French physicist and long-time pupil of the discoverer, Jacqueline Zadoc-Kahn Eisenmann (1904–1998). [2]
Jacqueline is a non-family asteroid of the main belt's background population when applying the hierarchical clustering method to its proper orbital elements. [4] [5] It orbits the Sun in the intermediate asteroid belt at a distance of 2.4–2.8 AU once every 4 years and 3 months (1,536 days; semi-major axis of 2.61 AU). Its orbit has an eccentricity of 0.08 and an inclination of 8° with respect to the ecliptic. [3] The asteroid's earliest preserved observation dates back to 7 March 1924 at Heidelberg Observatory, where the body's observation arc begins in February 1928, nearly four years after its official discovery observation at Algiers–Bouzaréah. [1]
This minor planet was named after Jacqueline Zadoc-Kahn Eisenmann (1904–1998), [11] a French physicist and long-time student of Jekhowsky's. The naming was mentioned in The Names of the Minor Planets by Paul Herget in 1955 ( H 97 ). [2]
In the Bus–Binzel SMASS classification, Jacqueline is a common, carbonaceous C-type asteroid. [3] [10]
In May 2000, a rotational lightcurve of Jacqueline was obtained from photometric observations by American photometrist Robert Stephens at the Santana Observatory ( 646 ) in California. Analysis of the classically shaped bimodal lightcurve gave a well-defined rotation period of 7.87±0.01 hours and a brightness variation of 0.6±0.02 magnitude, indicative of a non-spheroidal shape ( U=3 ). [9] Other measurements by Eric Barbotin and by astronomers at the Palomar Transient Factory gave a similar period of 7.873 and 7.875 hours with an amplitude of 0.72 and 0.43 magnitude, respectively ( U=3-/2 ). [12] [13]
In 2016, a lightcurve was published using modeled photometric data from the Lowell Photometric Database. It gave a concurring sidereal period of 7.87149 hours, as well as two spin axes of (7.0°, 55.0°) and (170.0°, 65.0°) in ecliptic coordinates (λ, β). [14]
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, Jacqueline measures (37.65±3.4), (38.87±0.51) and (40.152±0.199) kilometers in diameter and its surface has an albedo of (0.0544±0.011), (0.051±0.002) and (0.052±0.005), respectively. [6] [7] [8] The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0497 and a diameter of 37.61 kilometers based on an absolute magnitude of 11.0. [10]
Alternative mean-diameter measurements published by the WISE team include (29.523±10.14 km), (30.09±11.84 km), (31.991±0.454 km), (32.631±9.058 km) and (45.056±0.325 km) with corresponding albedos of (0.0670±0.0538), (0.07±0.06), (0.069±0.012), (0.06±0.02) and (0.0380±0.0053). [5] [10]