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4358 Lynn

4358 Lynn
Discovery 
Discovered by P. H. Cowell
Discovery site Greenwich Obs.
Discovery date 5 October 1909
Designations
MPC designation (4358) Lynn
Named after
William Thynne Lynn
(astronomer and author)
A909 TF · 1943 VB
1981 TO1 · 1985 SD6
1988 GK
main-belt · Eunomia
Orbital characteristics
Epoch 16 February 2017 (JD 2457800.5)
Uncertainty parameter 0
Observation arc 107.10 yr (39,118 days)
Aphelion 3.0571 AU
Perihelion 2.1554 AU
2.6063 AU
Eccentricity 0.1730
4.21 yr (1,537 days)
250.01°
0° 14m 3.12s / day
Inclination 13.086°
15.247°
260.46°
Physical characteristics
Dimensions 9.12±0.37 km
10.53 km (calculated)
3.8377±0.0006 h
0.21 (assumed)
0.307±0.034
S
12.10 · 12.2 · 12.84±0.64

4358 Lynn, provisional designation A909 TF, is a stony Eunomia asteroid from the middle region of the asteroid belt, approximately 10 kilometers in diameter. It was discovered by British astronomer Philip Herbert Cowell at the Royal Greenwich Observatory on 5 October 1909.

The asteroid is a member of the Eunomia family, a large group of S-type asteroids and the most prominent family in the intermediate main-belt. It orbits the Sun at a distance of 2.2–3.1 AU once every 4 years and 3 months (1,537 days). Its orbit has an eccentricity of 0.17 and an inclination of 13° with respect to the ecliptic. No precoveries or identifications were made prior to its discovery, and the asteroid's observation arc begins in 1909.

According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, the asteroid measures 9.1 kilometers in diameter and its surface has a high albedo of 0.307. The Collaborative Asteroid Lightcurve Link assumes a standard albedo for members of the Eunomia family of 0.21 and calculates a diameter of 10.5 kilometers, based on an absolute magnitude of 12.2. A rotational light-curve was obtained for this asteroid from photometric observations made at the Australian Oakley Southern Sky Observatory (E09) in April 2009. The light-curve gave a well-defined rotation period of 3.8377±0.0006 hours with a brightness variation of 0.60 in magnitude (U=3).


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