| Discovery[1] | |
|---|---|
| Discovered by | L. Chernykh |
| Discovery site | Crimea–Nauchnij |
| Discovery date | 8 October 1981 |
| Designations | |
| (4022) Nonna | |
Named after | Nonna Mordyukova[1] (Soviet actress) |
| 1981 TL4 · 1966 PC 1984 OJ | |
| main-belt[1][2] · (inner) Vestian[3][4] | |
| Orbital characteristics[2] | |
| Epoch 23 March 2018 (JD 2458200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 65.34yr (23,865 d) |
| Aphelion | 2.6585AU |
| Perihelion | 2.0576 AU |
| 2.3580 AU | |
| Eccentricity | 0.1274 |
| 3.62 yr (1,323 d) | |
| 99.638° | |
| 0° 16m 19.92s / day | |
| Inclination | 5.0911° |
| 278.34° | |
| 34.066° | |
| Physical characteristics | |
| 3.67±7.00 km[5] 7.13 km(calculated)[3] | |
| 2.5868±0.0002 h[a] 2.5873±0.0003 h[b][c] 2.5877±0.0005 h[6][d] 2.62±0.02 h[7][e] | |
| 0.20(assumed)[3] 0.907±0.440[5] | |
| QV[8] · S(assumed)[3] | |
| 12.90[5] · 13.1[2][3] 13.45±0.47[8] | |
4022 Nonna, provisional designation1981 TL4, is a Vestianasteroid from the inner regions of theasteroid belt, approximately 4 kilometers (2.5 miles) kilometers in diameter. It was discovered on 8 October 1981, by Soviet–Russian astronomerLyudmila Chernykh at theCrimean Astrophysical Observatory.[1] The asteroid was named after Soviet actressNonna Mordyukova. The nearlyfast rotator has an exceptionally lowlightcurve-amplitude indicating a nearly spherical shape.[3]
Nonna is a member of theVesta family (401).[3][4] Vestian asteroids have a composition akin to cumulateeucrites (HED meteorites) and are thought to have originated deep within4 Vesta's crust, possibly from theRheasilvia crater, a largeimpact crater on its southern hemisphere near the South pole, formed as a result of a subcatastrophic collision. Vesta is the main belt'ssecond-largest andsecond-most-massive body afterCeres.[9][10]
It orbits the Sun in theinner 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 aneccentricity of 0.13 and aninclination of 5° with respect to theecliptic.[2] The asteroid was first observed atGoethe Link Observatory in October 1952. The body'sobservation arc begins with its observation as1966 PC at Crimea-Nauchnij in August 1966, more than 15 years prior to its official discovery observation.[1]
Nonna has been characterized as aQ- andV-type asteroid byPan-STARRS' photometric survey,[8] while theCollaborative Asteroid Lightcurve Link (CALL) assumes it to be a commonS-type asteroid.[3] The overallspectral type of Vestian asteroids is typically that of a V-type.[9]: 23
Since 2006, several rotationallightcurves ofNonna have been obtained fromphotometric observations atModra Observatory by astronomersAdrián Galád andPetr Pravec.[a][b][c] Analysis of the best-rated lightcurve from September 2006 gave arotation period of 2.5877 hours with a brightness variation of 0.077magnitude (U=3).[6][d] A measurement by French amateur astronomerRené Roy gave a similar result of 2.62 hours, after using an alternative period solution.[7][e] All lightcurves showed an unusually low amplitude which is indicative for a spheroidal shape. The asteroid's short period is close to that of afast rotator.
According to the survey carried out by theNEOWISE mission of NASA'sWide-field Infrared Survey Explorer,Nonna measures 3.67 kilometers in diameter and its surface has an exceptionally highalbedo 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 anabsolute magnitude of 13.1.[3]
Thisminor planet was named after Soviet cinema actressNonna Mordyukova (1925–2008), a celebratedPeople's Artist of the USSR. The official naming citation was published by theMinor Planet Center on 25 August 1991 (M.P.C. 18645).[11]
