astro.wikisort.org - Asteroid

4022 Nonna, provisional designation 1981 TL₄, is a Vestian asteroid from the inner regions of the asteroid belt, approximately 4 kilometers (2.5 miles) kilometers in diameter. It was discovered on 8 October 1981, by Soviet–Russian astronomer Lyudmila Chernykh at the Crimean Astrophysical Observatory.[1] The asteroid was named after Soviet actress Nonna Mordyukova. The nearly fast rotator has an exceptionally low lightcurve-amplitude indicating a nearly spherical shape.[3]

4022 Nonna

Discovery [1]
Discovered by	L. Chernykh
Discovery site	Crimea–Nauchnij
Discovery date	8 October 1981
Designations
MPC designation	(4022) Nonna
Named after	Nonna Mordyukova [1] (Soviet actress)
Alternative designations	1981 TL4 · 1966 PC 1984 OJ
Minor planet category	main-belt [1][2] · (inner) Vestian [3][4]
Orbital characteristics [2]
Epoch 23 March 2018 (JD 2458200.5)
Uncertainty parameter 0
Observation arc	65.34 yr (23,865 d)
Aphelion	2.6585 AU
Perihelion	2.0576 AU
Semi-major axis	2.3580 AU
Eccentricity	0.1274
Orbital period (sidereal)	3.62 yr (1,323 d)
Mean anomaly	99.638°
Mean motion	0° 16m 19.92s / day
Inclination	5.0911°
Longitude of ascending node	278.34°
Argument of perihelion	34.066°
Physical characteristics
Mean diameter	3.67±7.00 km[5] 7.13 km (calculated)[3]
Synodic rotation period	2.5868±0.0002 h[lower-alpha 1] 2.5873±0.0003 h[lower-alpha 2][lower-alpha 3] 2.5877±0.0005 h[6][lower-alpha 4] 2.62±0.02 h[7][lower-alpha 5]
Geometric albedo	0.20 (assumed)[3] 0.907±0.440[5]
Spectral type	QV [8] · S (assumed)[3]
Absolute magnitude (H)	12.90[5] · 13.1[2][3] 13.45±0.47[8]

Orbit and classification

Nonna is a member of the Vesta family (401).[3][4] Vestian asteroids have a composition akin to cumulate eucrites (HED meteorites) and are thought to have originated deep within 4 Vesta's crust, possibly from the Rheasilvia crater, a large impact crater on its southern hemisphere near the South pole, formed as a result of a subcatastrophic collision. Vesta is the main belt's second-largest and second-most-massive body after Ceres.[9][10]

It orbits the Sun in the inner main-belt at a distance of 2.1–2.7 AU once every 3 years and 7 months (1,323 days; semi-major axis of 2.36 AU). Its orbit has an eccentricity of 0.13 and an inclination of 5° with respect to the ecliptic.[2] The asteroid was first observed at Goethe Link Observatory in October 1952. The body's observation arc begins with its observation as 1966 PC at Crimea-Nauchnij in August 1966, more than 15 years prior to its official discovery observation.[1]

Physical characteristics

Nonna has been characterized as a Q- and V-type asteroid by Pan-STARRS' photometric survey,[8] while the Collaborative Asteroid Lightcurve Link (CALL) assumes it to be a common S-type asteroid.[3] The overall spectral type of Vestian asteroids is typically that of a V-type.[9]^: 23

Rotation period

Since 2006, several rotational lightcurves of Nonna have been obtained from photometric observations at Modra Observatory by astronomers Adrián Galád and Petr Pravec.[lower-alpha 1][lower-alpha 2][lower-alpha 3] Analysis of the best-rated lightcurve from September 2006 gave a rotation period of 2.5877 hours with a brightness variation of 0.077 magnitude (U=3).[6][lower-alpha 4] A measurement by French amateur astronomer René Roy gave a similar result of 2.62 hours, after using an alternative period solution.[7][lower-alpha 5] All lightcurves showed an unusually low amplitude which is indicative for a spheroidal shape. The asteroid's short period is close to that of a fast rotator.

Diameter and albedo

According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Nonna measures 3.67 kilometers in diameter and its surface has an exceptionally high albedo of 0.907.[5] Conversely, CALL assumes a standard stony albedo of 0.20 and calculates a much larger diameter of 7.13 kilometers based on an absolute magnitude of 13.1.[3]

Naming

This minor planet was named after Soviet cinema actress Nonna Mordyukova (1925–2008), a celebrated People's Artist of the USSR. The official naming citation was published by the Minor Planet Center on 25 August 1991 (M.P.C. 18645).[11]

Notes

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 (1)-(5000) – Minor Planet Center
• 4022 Nonna at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 4022 Nonna at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

На других языках

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[de] (4022) Nonna

(4022) Nonna ist ein Hauptgürtelasteroid, der am 8. Oktober 1981 von der russischen Astronomin Ljudmila Iwanowna Tschernych vom Krim-Observatorium entdeckt wurde.

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- [en] 4022 Nonna

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