5316 Filatov

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5316 Filatov
Discovery [1]
Discovered by L. G. Karachkina
Discovery site Crimean Astrophysical Obs.
Discovery date 21 October 1982
MPC designation (5316) Filatov
Named after
Vladimir Filatov
(ophthalmologist and surgeon)[2]
1982 UB7 · 1982 XU3
1987 SF9 · 1991 LV3
main-belt · (outer)[3]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc 34.44 yr (12,578 days)
Aphelion 3.2253 AU
Perihelion 3.0919 AU
3.1586 AU
Eccentricity 0.0211
5.61 yr (2,050 days)
0° 10m 32.16s / day
Inclination 14.743°
Physical characteristics
Dimensions 22.95 km (calculated)[3]
45.693±0.511 km[4]
1061.3756±76.36 h[5]
0.057 (assumed)[3]
11.474±0.002 (R)[5] · 11.60[4] · 11.8[1] · 11.92[3] · 11.97±0.48[6]

5316 Filatov, provisional designation 1982 UB7, is a carbonaceous asteroid and potentially slow rotator from the outer region of the asteroid belt, approximately 30 kilometers in diameter.

The asteroid was discovered on 21 October 1982, by Russian astronomer Lyudmila Karachkina at the Crimean Astrophysical Observatory in Nauchnij on the Crimean peninsula.[7] It was later named for surgeon Vladimir Filatov.[2]

Orbit and classification[edit]

Filatov orbits the Sun in the outer main-belt at a distance of 3.1–3.2 AU once every 5 years and 7 months (2,050 days). Its orbit has an eccentricity of 0.02 and an inclination of 15° with respect to the ecliptic.[1] The body's observation arc begins at Nauchnij, 2 days after its official discovery observation.[7]

Physical characteristics[edit]

Potentially slow rotator[edit]

In November 2010, a rotational lightcurve of Filatov was obtained from photometric observations in the R-band at the Palomar Transient Factory in California. It gave an exceptionally long rotation period of 1061 hours with a brightness variation of 0.07 magnitude (U=1).[5]

However, the fragmentary lightcurve has received a low quality rating by the Collaborative Asteroid Lightcurve Link which means that the result could be completely wrong (also see potentially slow rotator).[3][5]

Diameter and albedo[edit]

According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Filatov measures 45.69 kilometers in diameter, and its surface has an albedo of 0.019,[4] while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous asteroids of 0.057 and calculates a diameter of 22.95 kilometers with an absolute magnitude of 11.92.[3]


This minor planet was named in honor of Vladimir Filatov (1875–1956), a Russian and Ukrainian ophthalmologist and surgeon.[2] The official naming citation was published by the Minor Planet Center on 1 September 1993 (M.P.C. 22508).[8]


  1. ^ a b c d "JPL Small-Body Database Browser: 5316 Filatov (1982 UB7)" (2017-03-29 last obs.). Jet Propulsion Laboratory. Retrieved 21 June 2017. 
  2. ^ a b c Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (5316) Filatov. Springer Berlin Heidelberg. p. 456. ISBN 978-3-540-00238-3. Retrieved 16 December 2016. 
  3. ^ a b c d e f g "LCDB Data for (5316) Filatov". Asteroid Lightcurve Database (LCDB). Retrieved 16 December 2016. 
  4. ^ a b c d Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Nugent, C.; et al. (November 2012). "Preliminary Analysis of WISE/NEOWISE 3-Band Cryogenic and Post-cryogenic Observations of Main Belt Asteroids". The Astrophysical Journal Letters. 759 (1): 5. arXiv:1209.5794Freely accessible. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. Retrieved 16 December 2016. 
  5. ^ a b c d Waszczak, Adam; Chang, Chan-Kao; Ofek, Eran O.; Laher, Russ; Masci, Frank; Levitan, David; et al. (September 2015). "Asteroid Light Curves from the Palomar Transient Factory Survey: Rotation Periods and Phase Functions from Sparse Photometry". The Astronomical Journal. 150 (3): 35. arXiv:1504.04041Freely accessible. Bibcode:2015AJ....150...75W. doi:10.1088/0004-6256/150/3/75. Retrieved 16 December 2016. 
  6. ^ 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 16 December 2016. 
  7. ^ a b "5316 Filatov (1982 UB7)". Minor Planet Center. Retrieved 16 December 2016. 
  8. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 16 December 2016. 

External links[edit]