| Discovery[1] | |
|---|---|
| Discovered by | Indiana University (Indiana Asteroid Program) |
| Discovery site | Goethe Link Obs. |
| Discovery date | 19 September 1963 |
| Designations | |
| (1729) Beryl | |
Named after | Beryl H. Potter[2] (research assistant) |
| 1963 SL · 1933 ST 1942 EW · 1949 JL 1950 VR · 1952 DO2 1955 BD · 1959 JB 1959 JL · 1959 LH 1972 GD2 | |
| main-belt[1][3] · (inner) background[4][5] | |
| Orbital characteristics[3] | |
| Epoch 27 April 2019 (JD 2458600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 84.59yr (30,896 d) |
| Aphelion | 2.4548AU |
| Perihelion | 2.0049 AU |
| 2.2299 AU | |
| Eccentricity | 0.1009 |
| 3.33 yr (1,216 d) | |
| 328.58° | |
| 0° 17m 45.6s / day | |
| Inclination | 2.4418° |
| 9.0601° | |
| 262.31° | |
| Physical characteristics | |
| 9.037±1.031 km[6][7] | |
| 4.8888±0.0003 h[8] | |
| 0.246[6][7] | |
| SMASS =S[3][9] | |
| 12.130±0.001(R)[10] 12.36[7] 12.40[6] 12.5[1][3][9] | |
1729 Beryl, provisional designation1963 SL, is a stony backgroundasteroid from the Florian region in the innerasteroid belt, approximately 9 kilometers (5.6 miles) in diameter. It was discovered on 19 September 1963, by astronomers atIndiana University during theIndiana Asteroid Program atGoethe Link Observatory in Indiana, United States.[1] TheS-type asteroid has arotation period of 4.9 hours.[9] It was named forBeryl H. Potter, a long-time research assistant of the discovering program.[2]
Beryl is a non-family asteroid of the main belt'sbackground population when applying thehierarchical clustering method to itsproper orbital elements.[4][5] Based on osculating Keplerianorbital elements, the asteroid has also been classified as a member of theFlora family (402), a giantasteroid family and the largest family of stony asteroids in the main-belt.[9] It orbits the Sun in theinner asteroid belt at a distance of 2.0–2.5 AU once every 3 years and 4 months (1,216 days;semi-major axis of 2.23 AU). Its orbit has aneccentricity of 0.10 and aninclination of 2° with respect to theecliptic.[3]
The asteroid was first observed as1933 ST atSimeiz Observatory in September 1933. The body'sobservation arc begins with its observation as1942 EW atTurku Observatory in March 1942, or more than 21 years prior to its official discovery observation atGoethe Link.[1]
Thisminor planet was named after Beryl H. Potter (1900–1985), research assistant at theIndiana University, who participated in the program of minor planet observations from 1949 to 1966. During this period, she analysed nearly 6,300photographic plates, measuring the positions of minor planets and reportinglost asteroids to theInternational Astronomical Union, which were then published in theMinor Planet Circulars.[2][11] The officialnaming citation was published by theMinor Planet Center on 15 July 1968 (M.P.C. 2883).[12]
In theSMASS classification,Beryl is a common, stonyS-type asteroid.[4][9]
In May 2009, a rotationallightcurve ofBeryl was obtained fromphotometric observations byJulian Oey at the Leura (E17) and Kingsgrove (E19) observatories in Australia. Lightcurve analysis gave arotation period of4.8888±0.0003 hours and a brightness variation of 0.20magnitude (U=3).[8] In addition, a nearly identical period of4.889±0.0014 hours with an amplitude of 0.14 was determined in the R-band by astronomers at thePalomar Transient Factory in October 2010 (U=2).[10]
According to the survey carried out by theNEOWISE mission of NASA'sWide-field Infrared Survey Explorer,Beryl measures 9.04 kilometers in diameter and its surface has analbedo of 0.246.[6][7] TheCollaborative Asteroid Lightcurve Link assumes an albedo of 0.24 – derived from8 Flora, the namesake of the Flora Family – and calculates a diameter of 8.58 kilometers based on anabsolute magnitude of 12.5.[9]
