13474 V'yus, provisional designation 1973 QO1, is a background asteroid from the central asteroid belt, approximately 7 kilometers (4.3 miles) in diameter. It was discovered on 29 August 1973, by Soviet astronomer Tamara Smirnova at the Crimean Astrophysical Observatory in Nauchnyj on the Crimean peninsula.[1] The asteroid has a rotation period of 6.6 hours and is likely elongated in shape.[4] It was named after Yurij Sergeevich Vasil'ev, rector of the former Saint Petersburg State Technical University in Russia.[1]
Discovery[1] | |
---|---|
Discovered by | T. Smirnova |
Discovery site | Crimean Astrophysical Obs. |
Discovery date | 29 August 1973 |
Designations | |
MPC designation | (13474) V'yus |
Named after | Yurij Sergeevich Vasil'ev (Rector of SPbSTU)[2] |
Alternative designations | 1973 QO1 · 1956 SA 1990 RT4 |
Minor planet category | main-belt[1][3] · (middle)[4] background[5][6] |
Orbital characteristics[3] | |
Epoch 27 April 2019 (JD 2458600.5) | |
Uncertainty parameter 0 | |
Observation arc | 61.56 yr (22,485 d) |
Aphelion | 3.3863 AU |
Perihelion | 1.8591 AU |
Semi-major axis | 2.6227 AU |
Eccentricity | 0.2911 |
Orbital period (sidereal) | 4.25 yr (1,551 d) |
Mean anomaly | 267.15° |
Mean motion | 0° 13m 55.2s / day |
Inclination | 7.8141° |
Longitude of ascending node | 317.29° |
Argument of perihelion | 36.160° |
Physical characteristics | |
Mean diameter | 6.922±0.351 km[7][8] 7.876±0.701 km[5] |
Synodic rotation period | 6.587±0.001 h[9] |
Geometric albedo | 0.113±0.022[5] 0.147±0.020[7][8] |
Spectral type | S/C (assumed)[4] |
Absolute magnitude (H) | 13.5[8] 13.7[1][3] |
V'yus is a non-family asteroid from the main belt's background population.[5][6] It orbits the Sun in the central 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 an eccentricity of 0.29 and an inclination of 8° with respect to the ecliptic.[3]
The body's observation arc begins with its first identification as 1956 SA at Goethe Link Observatory in September 1956, almost 17 years prior to its official discovery observation at Nauchnyj.[1]
This minor planet was named after Yurij Sergeevich Vasil'ev (Yurij Vasilyev; born 1929), expert in hydropower engineering and rector of the Saint Petersburg State Technical University (SPbSTU), now known as the Peter the Great St. Petersburg Polytechnic University in Russia.[2] The official naming citation was published by the Minor Planet Center on 27 April 2002 (M.P.C. 45338).[10]
The asteroid's spectral type is unknown. The Lightcurve Data Base assumes an S- or C-type to be equally likely, using an averaged value for its albedo (see below).[4][lower-alpha 1]
In September 2007, a rotational lightcurve of V'yus was obtained from photometric observations by Maurice Clark at the Montgomery College Observatory in Maryland, United States. Lightcurve analysis gave a well-defined rotation period of 6.587 hours with a brightness amplitude of 0.85 magnitude (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 the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, V'yus measures 6.922 and 7.876 kilometers in diameter and its surface has an albedo of 0.147 and 0.113, respectively.[7][8][5] The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.10 – a compromise value between the stony (0.20) and carbonaceous (0.057) asteroid's, both abundant in the main belt's central region – and calculates a diameter of 7.65 kilometers based on an absolute magnitude of 13.7.[4]
| |
---|---|
|
Small Solar System bodies | |||||||
---|---|---|---|---|---|---|---|
Minor planets |
| ||||||
Comets |
| ||||||
Other |
|