| Discovery[1] | |
|---|---|
| Discovered by | T. Smirnova |
| Discovery site | Crimean Astrophysical Obs. |
| Discovery date | 29 August 1973 |
| Designations | |
| (13474) Vʹyus | |
Named after | Yurij Sergeevich Vasil'ev (Rector ofSPbSTU)[2] |
| 1973 QO1 · 1956 SA 1990 RT4 | |
| main-belt[1][3] · (middle)[4] background[5][6] | |
| Orbital characteristics[3] | |
| Epoch 27 April 2019 (JD 2458600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 61.56yr (22,485 d) |
| Aphelion | 3.3863AU |
| Perihelion | 1.8591 AU |
| 2.6227 AU | |
| Eccentricity | 0.2911 |
| 4.25 yr (1,551 d) | |
| 267.15° | |
| 0° 13m 55.2s / day | |
| Inclination | 7.8141° |
| 317.29° | |
| 36.160° | |
| Physical characteristics | |
| 6.922±0.351 km[7][8] 7.876±0.701 km[5] | |
| 6.587±0.001 h[9] | |
| 0.113±0.022[5] 0.147±0.020[7][8] | |
| S/C(assumed)[4] | |
| 13.5[8] 13.7[1][3] | |
13474 Vʹyus, provisional designation1973 QO1, is a backgroundasteroid from the centralasteroid belt, approximately 7 kilometers (4.3 miles) in diameter. It was discovered on 29 August 1973, by Soviet astronomerTamara Smirnova at theCrimean Astrophysical Observatory in Nauchnyj on the Crimean peninsula.[1] The asteroid has arotation period of 6.6 hours and is likely elongated in shape.[4] It was named after Yurij Sergeevich Vasil'ev, rector of the formerSaint Petersburg State Technical University in Russia.[1]
Vʹyus is a non-family asteroid from the main belt'sbackground population.[5][6] It orbits the Sun in thecentral asteroid belt at a distance of 1.9–3.4 AU once every 4 years and 3 months (1,551 days;semi-major axis of 2.62 AU). Its orbit has aneccentricity of 0.29 and aninclination of 8° with respect to theecliptic.[3]
The body'sobservation arc begins with its first identification as1956 SA atGoethe Link Observatory in September 1956, almost 17 years prior to its official discovery observation at Nauchnyj.[1]
Thisminor planet was named after Yurij Sergeevich Vasil'ev (Yurij Vasilyev; born 1929), expert inhydropower engineering and rector of the Saint Petersburg State Technical University (SPbSTU), now known as thePeter the Great St. Petersburg Polytechnic University in Russia. The name is formed by putting the surname first and then concatenating the threeCyrillic letters that form his initials —Vasil'evYurijSergeevich, ВЮС.[2] The officialnaming citation was published by theMinor Planet Center on 27 April 2002 (M.P.C. 45338).[10]
The asteroid'sspectral type is unknown. The Lightcurve Data Base assumes anS- orC-type to be equally likely, using an averaged value for its albedo(see below).[4][a]
In September 2007, a rotationallightcurve ofVʹyus was obtained fromphotometric observations by Maurice Clark at the Montgomery College Observatory in Maryland, United States. Lightcurve analysis gave a well-definedrotation period of 6.587 hours with a brightness amplitude of 0.85magnitude (U=3).[9] A high brightness amplitude typically indicates that the body has an elongated rather than spherical shape.
According to the survey carried out by theNEOWISE mission of NASA'sWide-field Infrared Survey Explorer,Vʹyus measures 6.922 and 7.876 kilometers in diameter and its surface has analbedo of 0.147 and 0.113, respectively.[7][8][5] TheCollaborative Asteroid Lightcurve Link assumes an albedo of 0.10 – a compromise value between thestony (0.20) andcarbonaceous (0.057) asteroid's, both abundant in the main belt's central region – and calculates a diameter of 7.65 kilometers based on anabsolute magnitude of 13.7.[4]
