13474 Vʹyus
| 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 of SPbSTU)[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 | 61.56 yr (22,485 d) |
| Aphelion | 3.3863 AU |
| 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 | |
Mean diameter | 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 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]
Orbit and classification[edit]
Vʹyus 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]
Naming[edit]
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]
Physical characteristics[edit]
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][a]
Rotation period[edit]
In September 2007, a rotational lightcurve of Vʹyus 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.
Diameter and albedo[edit]
According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Vʹyus 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]
Notes[edit]
- ^ Asteroid Lightcurve Data Base (LCDB) – 2. Taxonomic Class, orbital class, and albedo. The LCDB generically assumes an S/C-type with an albedo of 0.10 for non-family main belt asteroids with a semi-major axis between 2.6 and 2.7.
References[edit]
- ^ a b c d e f "13474 Vʹyus (1973 QO1)". Minor Planet Center. Retrieved 16 January 2019.
- ^ a b Schmadel, Lutz D. (2007). "(13474) Vʹyus". Dictionary of Minor Planet Names – (13474) Vʹyus. Springer Berlin Heidelberg. p. 800. doi:10.1007/978-3-540-29925-7_8828. ISBN 978-3-540-00238-3.
- ^ a b c d "JPL Small-Body Database Browser: 13474 Vʹyus (1973 QO1)" (2018-04-20 last obs.). Jet Propulsion Laboratory. Retrieved 16 January 2019.
- ^ a b c d e "LCDB Data for (13474) Vʹyus". Asteroid Lightcurve Database (LCDB). Retrieved 19 October 2017.
- ^ a b c d e "Asteroid 13474 Vʹyus". Small Bodies Data Ferret. Retrieved 16 January 2019.
- ^ a b "Asteroid (13474) Vʹyus – Proper elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 16 January 2019.
- ^ a b c Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Dailey, J.; et al. (November 2011). "Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters". The Astrophysical Journal. 741 (2): 20. arXiv:1109.4096. Bibcode:2011ApJ...741...68M. doi:10.1088/0004-637X/741/2/68. Retrieved 19 October 2017.
- ^ a b c d Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal. 741 (2): 25. arXiv:1109.6407. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90.
- ^ a b Clark, Maurice (October 2008). "Asteroid Lightcurve Observations". The Minor Planet Bulletin. 35 (4): 152–154. Bibcode:2008MPBu...35..152C. ISSN 1052-8091. Retrieved 19 October 2017.
- ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 19 October 2017.
External links[edit]
- Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
- Dictionary of Minor Planet Names, Google books
- Discovery Circumstances: Numbered Minor Planets (10001)-(15000) – Minor Planet Center
- 13474 Vʹyus at AstDyS-2, Asteroids—Dynamic Site
- 13474 Vʹyus at the JPL Small-Body Database
