4022 Nonna
Asteroid
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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]
(Soviet actress)
| Discovery[1] | |
|---|---|
| Discovered by | L. Chernykh |
| Discovery site | Crimea–Nauchnij |
| Discovery date | 8 October 1981 |
| Designations | |
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 | 65.34 yr (23,865 d) |
| Aphelion | 2.6585 AU |
| 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] | |
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.[a][b][c] 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][d] A measurement by French amateur astronomer René 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 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
- Pravec (2010) web: lightcurve plot of (4022) Nonna with a rotation period 2.5868±0.0002 hours and a brightness amplitude of 0.10±0.01 mag from March 2010. Quality Code is 3. Summary figures at the LCDB and Pravec, P.; Wolf, M.; Sarounova, L. (2010) with data sheet
- Pravec (2016) web: lightcurve plot of (4022) Nonna with a rotation period 2.5873±0.0003 hours and a brightness amplitude of 0.09±0.01 mag from April 2016. Quality Code is 3. Summary figures at the LCDB and Pravec, P.; Wolf, M.; Sarounova, L. (2016) with data sheet
- Pravec (2017) lightcurve plot of (4022) Nonna with a rotation period of 2.5873±0.0001 hours and an amplitude of 0.088 mag, from October 2017. Ondrejov data obtained by the NEO Photometric Program and collaborating projects with data sheet
- Galad/Pravec (2006) lightcurve plot of (4022) Nonna with a rotation period of 2.578 hours and an amplitude of 0.077 mag, from September 2006. Ondrejov data obtained by the NEO Photometric Program and collaborating projects with data sheet
