astro.wikisort.org - Asteroid

11824 Alpaidze, provisional designation 1982 SO₅, is a stony background asteroid from the middle region of the asteroid belt, approximately 5 kilometers (3.1 miles) in diameter. It was discovered on 16 September 1982, by Russian astronomer Lyudmila Chernykh at the Crimean Astrophysical Observatory, Nauchnyj, on the Crimean peninsula. The asteroid was named for Soviet General Galaktion Alpaidze.[2]

11824 Alpaidze

Discovery[1]
Discovered by	L. Chernykh
Discovery site	Crimean Astrophysical Obs.
Discovery date	16 September 1982
Designations
MPC designation	(11824) Alpaidze
Named after	Galaktion Alpaidze (Plesetsk Cosmodrome)[2]
Alternative designations	1982 SO5 · 1978 WV1
Minor planet category	main-belt · (middle)[3] background
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc	37.98 yr (13,874 days)
Aphelion	3.4452 AU
Perihelion	1.8267 AU
Semi-major axis	2.6359 AU
Eccentricity	0.3070
Orbital period (sidereal)	4.28 yr (1,563 days)
Mean anomaly	59.051°
Mean motion	0° 13m 49.08s / day
Inclination	1.7272°
Longitude of ascending node	1.3721°
Argument of perihelion	353.03°
Physical characteristics
Mean diameter	4.83 km (calculated)[3]
Synodic rotation period	4.1146±0.0021 h[4] 4.1157±0.0021 h[4]
Geometric albedo	0.10 (assumed)[3]
Spectral type	S/C[3]
Absolute magnitude (H)	14.7[1][3] · 15.309±0.001 (S)[4] · 14.692±0.001 (R)[4]

Orbit and classification

Alpaidze is a non-family asteroid from the main belt's background population. It orbits the Sun in the central main-belt at a distance of 1.8–3.4 AU once every 4 years and 3 months (1,563 days). Its orbit has an eccentricity of 0.31 and an inclination of 2° with respect to the ecliptic.[1] It was first identified as 1978 WV₁ at Palomar Observatory in November 1978. The body's observation arc, however, begins with its official discovery observation.[2]

Naming

This minor planet was named after Georgian-born Soviet Lieutenant General Galaktion Alpaidze (1916–2006), Hero of the Soviet Union and laureate of the USSR State Prize. He was the head of the Plesetsk Cosmodrome in the 1960s and 1970s, where space crafts were tested. During his supervision, the Cosmodrome became the world's most active launch site in the world.[2] The official naming citation was published by the Minor Planet Center on 2 April 2007 (M.P.C. 59385).[5]

Physical characteristics

Lightcurves

In September 2009, two rotational lightcurves of Alpaidze were obtained from photometric observations made by astronomers at the Palomar Transient Factory, California. The fragmentary lightcurves gave a rotation period of 4.1157 and 4.1146 hours with a brightness variation of 0.05 and 0.06 in magnitude, respectively (U=1/1).[4]

Diameter and albedo

The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.10 – a compromise value between the stony (0.20) and carbonaceous (0.057) albedos for unknown asteroids in the 2.6–2.7 AU region of the main-belt – and calculates a diameter of 4.8 kilometers with an absolute magnitude of 14.7.[3]

References

External links

• Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
• Dictionary of Minor Planet Names, Google books
• Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
• Discovery Circumstances: Numbered Minor Planets (10001)-(15000) – Minor Planet Center
• 11824 Alpaidze at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 11824 Alpaidze at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

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