7675 Gorizia

7675 Gorizia, provisional designation 1995 WT5, is a background asteroid from the inner regions of the asteroid belt, approximately 3 kilometers in diameter. It was discovered on 23 November 1995, by the staff at Farra d'Isonzo Observatory in northeastern Italy.[4] It is named for the Italian town of Gorizia.[2]

7675 Gorizia
Discovery [1]
Discovered byFarra d'Isonzo Obs.
Discovery siteFarra d'Isonzo Obs.
Discovery date23 November 1995
Designations
(7675) Gorizia
Named after
Gorizia (Italian town)[2]
1995 WT5 · 1976 UT19
1993 FD52
main-belt · (inner)
background
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc39.64 yr (14,479 days)
Aphelion2.6402 AU
Perihelion2.1896 AU
2.4149 AU
Eccentricity0.0933
3.75 yr (1,371 days)
206.26°
0° 15m 45.36s / day
Inclination4.7499°
28.333°
127.73°
Physical characteristics
Dimensions3 km (est. at 0.22)[3]
14.4[1]

    Orbit and classification

    Gorizia orbits the Sun in the inner main-belt at a distance of 2.2–2.6 AU once every 3 years and 9 months (1,371 days). Its orbit has an eccentricity of 0.09 and an inclination of 5° with respect to the ecliptic.[1] In 1976, it was first identified as 1976 UT19 at the Japanese Kiso Observatory, extending the body's observation arc by 19 years prior to its official discovery observation.[4]

    Physical characteristics

    As of 2017, Gorizia's effective size and composition, as well as its rotation period and shape remain unknown.[5] No estimates about Gorizia's diameter and albedo have been published by any of the space-based surveys such as the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite, or NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission. It has an absolute magnitude of 14.4.[1]

    Based on a generic magnitude-to-diameter conversion, Gorizia measures between 3 and 7 kilometers for an albedo in the range of 0.05 to 0.25.[3] Since asteroids in the inner main-belt are often of a silicaceous rather than of a carbonaceous composition, with higher albedos, typically around 0.20, Gorizia's diameter might be on the lower end of NASA's published conversion table, as the higher the body's reflectivity (albedo), the smaller its diameter, for a given absolute magnitude (brightness).[3]

    Naming

    This minor planet was named for the northeastern Italian town of Gorizia, on the occasion of the 1000th anniversary celebrating its first documented mentioning. The discovering observatory, after which the asteroid 7501 Farra was named, is located not far from Gorizia.[2] The official naming citation was published by the Minor Planet Center on 2 February 1999 (M.P.C. 33789).[6]

    References
    1. "JPL Small-Body Database Browser: 7675 Gorizia (1995 WT5)" (2016-06-15 last obs.). Jet Propulsion Laboratory. Retrieved 22 June 2017.
    2. Schmadel, Lutz D. (2007). "(7675) Gorizia". Dictionary of Minor Planet Names – (7675) Gorizia. Springer Berlin Heidelberg. p. 609. doi:10.1007/978-3-540-29925-7_6612. ISBN 978-3-540-00238-3.
    3. "Absolute Magnitude (H)". NASA/JPL. Retrieved 17 January 2017.
    4. "7675 Gorizia (1995 WT5)". Minor Planet Center. Retrieved 17 January 2017.
    5. "LCDB Data for (7675) Gorizia – The asteroid is not in the database". Asteroid Lightcurve Database (LCDB). Retrieved 17 January 2017.
    6. "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 17 January 2017.

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