13474 V'yus

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13474 V'yus
Discovery [1]
Discovered by T. Smirnova
Discovery site Crimean Astrophysical Obs.
Discovery date 29 August 1973
MPC designation (13474) V'yus
Named after
Yurij Sergeevich Vasil'ev
(Rector of SPbSTU)[2]
1973 QO1 · 1956 SA
1990 RT4
main-belt · (middle)[3]
background [4]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc 60.46 yr (22,083 days)
Aphelion 3.3857 AU
Perihelion 1.8552 AU
2.6205 AU
Eccentricity 0.2920
4.24 yr (1,549 days)
0° 13m 56.28s / day
Inclination 7.8180°
Physical characteristics
Dimensions 6.922±0.351 km[5][6]
7.65 km (calculated)[3]
6.587±0.001 h[7]
0.10 (assumed)[3]
S/C (assumed)[3]
13.5[6] · 13.7[1][3] · 13.91±0.47[8]

13474 V'yus, provisional designation 1973 QO1, is an asteroid from the background population of the asteroid belt's central region, approximately 7 kilometers 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.[9] It was named after Yurij Sergeevich Vasil'ev, rector of the former Saint Petersburg State Technical University in Russia.

Orbit and classification[edit]

V'yus is a non-family asteroid from the main belt's background population.[4] 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 (1,549 days). Its orbit has an eccentricity of 0.29 and an inclination of 8° with respect to the ecliptic.[1]

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.[9]

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).[3][a]

Rotation period[edit]

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).[7] 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, V'yus measures 6.922 kilometers in diameter and its surface has an albedo of 0.147.[5][6] 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.[3]


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]


  1. ^ 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.


  1. ^ a b c d "JPL Small-Body Database Browser: 13474 V'yus (1973 QO1)" (2017-03-14 last obs.). Jet Propulsion Laboratory. Retrieved 19 October 2017. 
  2. ^ a b Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (13474) V’yus. Springer Berlin Heidelberg. p. 800. ISBN 978-3-540-00238-3. Retrieved 19 October 2017. 
  3. ^ a b c d e f g "LCDB Data for (13474) V'yus". Asteroid Lightcurve Database (LCDB). Retrieved 19 October 2017. 
  4. ^ a b "Small Bodies Data Ferret". Nesvorny HCM Asteroid Families V3.0. Retrieved 19 October 2017. 
  5. ^ 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:1109.4096Freely accessible. Bibcode:2011ApJ...741...68M. doi:10.1088/0004-637X/741/2/68. Retrieved 19 October 2017. 
  6. ^ 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" (PDF). The Astrophysical Journal. 741 (2): 25. arXiv:1109.6407Freely accessible. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved 19 October 2017. 
  7. ^ 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. 
  8. ^ Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce; et al. (November 2015). "Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results". Icarus. 261: 34–47. arXiv:1506.00762Freely accessible. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. Retrieved 19 October 2017. 
  9. ^ a b "13474 V'yus (1973 QO1)". Minor Planet Center. Retrieved 19 October 2017. 
  10. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 19 October 2017. 

External links[edit]