| Discovery[1] | |
|---|---|
| Discovered by | P. H. Cowell |
| Discovery site | Greenwich Obs. |
| Discovery date | 5 October 1909 |
| Designations | |
| (4358) Lynn | |
Named after | William Thynne Lynn (astronomer and author)[2] |
| A909 TF · 1943 VB 1981 TO1 · 1985 SD6 1988 GK | |
| main-belt · Eunomia[3] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 107.67 yr (39,325 days) |
| Aphelion | 3.0579AU |
| Perihelion | 2.1567 AU |
| 2.6073 AU | |
| Eccentricity | 0.1728 |
| 4.21yr (1,538 days) | |
| 296.97° | |
| 0° 14m 2.76s / day | |
| Inclination | 13.084° |
| 15.249° | |
| 260.32° | |
| Physical characteristics | |
| Dimensions | 9.12±0.37 km[4] 10.53 km(calculated)[3] |
| 3.8377±0.0006h[5] | |
| 0.21(assumed)[3] 0.307±0.034[4] | |
| S[3] | |
| 12.10[4] · 12.2[1][3] · 12.84±0.64[6] | |
4358 Lynn, provisional designationA909 TF, is a stony Eunomiaasteroid from the central region of theasteroid belt, approximately 10 kilometers in diameter. It was discovered by British astronomerPhilip Herbert Cowell at theRoyal Greenwich Observatory on 5 October 1909.[7] It was named forWilliam Lynn, an assistant astronomer at the discovering observatory.[2]
Lynn is a member of theEunomia family, a large group ofstony asteroids and the most prominent family in the intermediate main-belt. It orbits the Sun in thecentral main-belt at a distance of 2.2–3.1 AU once every 4 years and 3 months (1,538 days). Its orbit has aneccentricity of 0.17 and aninclination of 13° with respect to theecliptic.[1] Noprecoveries or identifications were made prior to its discovery, and the asteroid'sobservation arc begins in 1909.[7]
According to the survey carried out by NASA'sWide-field Infrared Survey Explorer with its subsequentNEOWISE mission,Lynn measures 9.1 kilometers in diameter and its surface has a highalbedo of 0.307.[4] TheCollaborative Asteroid Lightcurve Link assumes a standard albedo for members of the Eunomia family of 0.21 and calculates a diameter of 10.5 kilometers with anabsolute magnitude of 12.2.[3]
In April 2009, a rotationallightcurve ofLynn was obtained from photometric observations made at the Oakley Southern Sky Observatory (E09) in Australia. Lightcurve analysis gave a well-definedrotation period of3.8377 hours with a brightness variation of 0.60 in magnitude (U=3).[5]
Thisminor planet is named for William Thynne Lynn (1835–1911), who worked for many years as an assistant at the Royal Greenwich Observatory during the second half of the 19th century. He was also an author of various well received books and many short notes on astronomical topics, which were printed inThe Observatory.[2] It was named by theMinor Planet Names Committee after a proposal byBrian G. Marsden.[7] The approved naming citation was published by theMinor Planet Center on 1 September 1993 (M.P.C. 22501).[8]
