5185 Alerossi

5185 Alerossi, provisional designation 1990 RV2, is a background asteroid from the central region of the asteroid belt, approximately 13 miles (21 kilometers) in diameter. It was discovered on 15 September 1990, by American astronomer Henry Holt at Palomar Observatory in California, United States.[1] The asteroid was later named for Italian geodesist Alessandro Rossi.[2]

5185 Alerossi
Discovery [1]
Discovered byH. E. Holt
Discovery sitePalomar Obs.
Discovery date15 September 1990
Designations
(5185) Alerossi
Named after
Alessandro Rossi
(Italian geodesist)[2]
1990 RV2 · 1933 SE
1955 SM · 1981 RA1
1984 HG · 1986 UR4
1988 FQ3
main-belt [1][3] · (middle)
background [4][5]
Orbital characteristics [3]
Epoch 23 March 2018 (JD 2458200.5)
Uncertainty parameter 0
Observation arc84.34 yr (30,804 d)
Aphelion2.8993 AU
Perihelion2.4533 AU
2.6763 AU
Eccentricity0.0833
4.38 yr (1,599 d)
34.812°
0° 13m 30.36s / day
Inclination8.3787°
216.42°
216.46°
Physical characteristics
Mean diameter
12.86±1.2 km[6][4]
13.36±0.12 km[7]
0.081±0.009[7]
0.1408±0.031[6]
12.6[1][3]

    Orbit and classification

    Alerossi is a non-family asteroid from the main belt's background population.[4][5] It orbits the Sun in the central asteroid belt at a distance of 2.5–2.9 AU once every 4 years and 5 months (1,599 days; semi-major axis of 2.68 AU). Its orbit has an eccentricity of 0.08 and an inclination of 8° with respect to the ecliptic.[3]

    In 1933, it was first observed as 1933 SE at Uccle Observatory, extending the body's observation arc by 57 years prior to its official discovery observation at Palomar.[1]

    Naming

    This minor planet was named after Italian geodesists Alessandro Rossi (born 1964), a member of the "Group of Satellite Flight Dynamics" at the Istituto CNECE in Pisa, Italy. Expert in space geodesy and participant in the Laser Geodynamics Satellites (LAGEOS) mission, he examines Earth's artificial orbital debris, the natural debris around mission targets to improve space-craft maneuvers, and the potential hazard of Earth-crossers.[2] The official naming citation was published by the Minor Planet Center on 28 July 1999 (M.P.C. 61268).[8]

    Physical characteristics

    According to the surveys carried out by the Infrared Astronomical Satellite IRAS and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Alerossi measures 12.9 and 13.3 kilometers in diameter and its surface has an albedo of 0.08 and 0.14, respectively.[6][7] It has an absolute magnitude of 12.6.[1][3] As of 2018, the asteroid's spectral type, rotation period and shape remain unknown.[3][9]

    gollark: (note: I like Linux and this is a joke, do not potato me)
    gollark: What do Linux users do to change a lightbulb?First, a user creates a bug report, only for it to be closed with "could not reproduce" as the developers got to it in the day. Eventually, some nights later, someone realizes that it is actually a problem, and decides to start work on a fix, soliciting the help of other people.Debates soon break out on the architecture of the new lightbulb - should they replace it with an incandescent bulb (since the bulb which broke was one of those), try and upgrade it to a halogen or LED bulb, which are technically superior if more complex. or go to a simpler and perhaps more reliable solution such as a fire?While an LED bulb is decided on, they eventually, after yet more debate, deem off-the-shelf bulbs unsuitable, and decide to make their own using commercially available LED modules. However, some of the group working on this are unhappy with this, and splinter off, trying to set up their own open semiconductor production operation to produce the LEDs.Despite delays introduced by feature creep, as it was decided halfway through to also add RGB capability and wireless control, the main group still manages to produce an early alpha, and tests it as a replacement for the original bulb. Unfortunately it stops working after a few days of use, and debugging of the system suggests that the problem is because of their power supply - the bulb needs complex, expensive, and somewhat easily damaged circuitry to convert the mains AC power into DC suitable for the LEDs, and they got that bit a bit wrong.So they decide to launch their own power grid and lighting fixture standard, which is, although incompatible with every other device, technically superior, and integrates high-speed networking so they can improve the control hardware. Having completely retrofitted the house the original lightbulb failed in and put all their designs and code up on GitHub, they deem the project a success, and after only a year!
    gollark: Minetest is already a thing.
    gollark: It really isn't.
    gollark: Most people of my generation just use popular social media apps on a locked down phone of some sort and may not know what a "file" or "terminal" or "potatOS" is.

    References
    1. "5185 Alerossi (1990 RV2)". Minor Planet Center. Retrieved 25 July 2018.
    2. Schmadel, Lutz D. (2007). "(5185) Alerossi". Dictionary of Minor Planet Names – (5185) Alerossi. Springer Berlin Heidelberg. p. 446. doi:10.1007/978-3-540-29925-7_5030. ISBN 978-3-540-00238-3.
    3. "JPL Small-Body Database Browser: 5185 Alerossi (1990 RV2)" (2018-01-22 last obs.). Jet Propulsion Laboratory. Retrieved 25 July 2018.
    4. "Asteroid 5185 Alerossi". Small Bodies Data Ferret. Retrieved 25 July 2018.
    5. "Asteroid (5185) Alerossi – Proper elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 25 May 2018.
    6. Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System – IRAS-A-FPA-3-RDR-IMPS-V6.0: IRAS-A-FPA-3-RDR-IMPS-V6.0. Bibcode:2004PDSS...12.....T. Retrieved 25 July 2018.
    7. Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Dailey, J.; et al. (November 2011). "Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters". The Astrophysical Journal. 741 (2): 20. arXiv:1109.4096. Bibcode:2011ApJ...741...68M. doi:10.1088/0004-637X/741/2/68.
    8. "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 9 May 2016.
    9. "LCDB Data for (5185) Alerossi". Asteroid Lightcurve Database (LCDB). Retrieved 20 June 2017.

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