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.

5316 Filatov
Discovery [1]
Discovered byL. G. Karachkina
Discovery siteCrimean Astrophysical Obs.
Discovery date21 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 arc34.44 yr (12,578 days)
Aphelion3.2253 AU
Perihelion3.0919 AU
3.1586 AU
5.61 yr (2,050 days)
0° 10m 32.16s / day
Physical characteristics
Dimensions22.95 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]

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 classificationEdit

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 characteristicsEdit

Potentially slow rotatorEdit

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 albedoEdit

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). "(5316) Filatov". Dictionary of Minor Planet Names – (5316) Filatov. Springer Berlin Heidelberg. p. 456. doi:10.1007/978-3-540-29925-7_5131. ISBN 978-3-540-00238-3.
  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:1209.5794. 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:1504.04041. 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:1506.00762. 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 linksEdit