_Jacqueline.png) Shape model ofJacqueline from itslightcurve | |
| 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 | 92.01yr (33,607 d) |
| Aphelion | 2.8098AU |
| 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] | |
| SMASS =C[3] | |
| 11.1[1][3] | |
1017 Jacqueline (prov. designation:A924 CHor1924 QL) is a darkbackground asteroid from the central regions of theasteroid belt. It was discovered on 4 February 1924, by Russian-French astronomerBenjamin Jekhowsky at theAlgiers Observatory, Algeria, in North Africa.[1] The carbonaceousC-type asteroid has arotation period of 7.87 hours with a high brightness amplitude of 0.6magnitude 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'sbackground population when applying thehierarchical clustering method to itsproper orbital elements.[4][5] It orbits the Sun in theintermediate 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 aneccentricity of 0.08 and aninclination of 8° with respect to theecliptic.[3] The asteroid's earliest preserved observation dates back to 7 March 1924 atHeidelberg Observatory, where the body'sobservation arc begins in February 1928, nearly four years after its official discovery observation at Algiers–Bouzaréah.[1]
Thisminor planet was named afterJacqueline Zadoc-Kahn Eisenmann (1904–1998),[11] a French physicist and long-time student of Jekhowsky's. Thenaming was mentioned inThe Names of the Minor Planets byPaul Herget in 1955 (H 97).[2]
In the Bus–BinzelSMASS classification,Jacqueline is a common, carbonaceousC-type asteroid.[3][10]
In May 2000, a rotationallightcurve ofJacqueline was obtained fromphotometric observations by American photometristRobert Stephens at the Santana Observatory (646) in California. Analysis of the classically shaped bimodal lightcurve gave a well-definedrotation period of7.87±0.01 hours and a brightness variation of0.6±0.02magnitude, indicative of a non-spheroidal shape (U=3).[9] Other measurements by Eric Barbotin and by astronomers at thePalomar 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 twospin axes of (7.0°, 55.0°) and (170.0°, 65.0°) inecliptic coordinates (λ, β).[14]
According to the surveys carried out by the Infrared Astronomical SatelliteIRAS, the JapaneseAkari satellite and theNEOWISE mission of NASA'sWide-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 analbedo of (0.0544±0.011), (0.051±0.002) and (0.052±0.005), respectively.[6][7][8] TheCollaborative Asteroid Lightcurve Link derives an albedo of 0.0497 and a diameter of 37.61 kilometers based on anabsolute 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]
