2348 Michkovitch

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2348 Michkovitch
Discovery [1]
Discovered by M. B. Protić
Discovery site Belgrade Obs.
Discovery date 10 January 1939
MPC designation 2348 Michkovitch
Named after
Vojislav Mišković
1939 AA · 1958 GR
1965 DA · 1975 XA5
1978 QH1
main-belt · Erigone[3]
Orbital characteristics[1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc 76.96 yr (28,111 days)
Aphelion 2.8076 AU
Perihelion 1.9862 AU
2.3969 AU
Eccentricity 0.1713
3.71 yr (1,355 days)
0° 15m 56.16s / day
Inclination 4.6718°
Physical characteristics
Dimensions 4.802±0.078 km[4]
15.33 km (calculated)[3]
28 h[a]
0.057 (assumed)[3]

2348 Michkovitch, provisional designation 1939 AA, is a presumed carbonaceous Erigone asteroid from the inner regions of the asteroid belt, calculated to measure approximately 15 kilometers in diameter. It was discovered by Serbian astronomer Milorad Protić at Belgrade Observatory on 10 January 1939.[6]

The asteroid is a member of the Erigone family, named after 163 Erigone, its largest member and namesake.[3] It is a rather young cluster (170–280 My) of dark C-type bodies in the inner main belt, which otherwise consists mostly of stony asteroids.[7] It orbits the Sun at a distance of 2.0–2.8 AU once every 3 years and 9 months (1,355 days). Its orbit has an eccentricity of 0.17 and an inclination of 5° with respect to the ecliptic.[1] No precoveries were taken. The asteroid's observation arc starts 15 days after its official discovery with the first used observation taken at the Royal Observatory of Belgium.[6]

A 2011-published rotational light-curve for this asteroid obtained from photometric observations by Australian amateur astronomer David Higgins gave a longer-than average rotation period of 28 hours with a brightness variation of 0.12 in magnitude (U=2).[a]

According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, the asteroid measures 4.8 kilometers in diameter and its surface has an outstanding albedo of 0.84.[4] The Collaborative Asteroid Lightcurve Link strongly disagrees with the result obtained by the space-based observatory and assumes a standard albedo for carbonaceous asteroids of 0.057 and calculates a much larger diameter of 15.4 kilometers, as the lower the body's albedo (reflectivity), the larger its diameter at a constant absolute magnitude (brightness).[3]

The minor planet was named by Milorad Protić after his professor Vojislav Mišković (1892–1976), first director of the Belgrade Observatory and founder of the Astronomical Institute at SANU.[2] Naming citation was published on 7 March 1985 (M.P.C. 9477).[8]


  1. ^ a b Higgins (2011) web: rotation period 28 hours with a brightness amplitude of 0.12 mag. Summary figures at Collaborative Asteroid Lightcurve Link (CALL) for (2348) Michkovitch and Higgins, D.J. (2011)
  1. ^ a b c d "JPL Small-Body Database Browser: 2348 Michkovitch (1939 AA)" (2016-01-13 last obs.). Jet Propulsion Laboratory. Retrieved July 2016. 
  2. ^ a b Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (2348) Michkovitch. Springer Berlin Heidelberg. p. 191. ISBN 978-3-540-00238-3. Retrieved July 2016. 
  3. ^ a b c d e f g "LCDB Data for (2348) Michkovitch". Asteroid Lightcurve Database (LCDB). Retrieved July 2016. 
  4. ^ 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:1109.6407. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved July 2016. 
  5. ^ 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 July 2016. 
  6. ^ a b "2348 Michkovitch (1939 AA)". Minor Planet Center. Retrieved July 2016. 
  7. ^ Carruba, V.; Aljbaae, S.; Winter, O. C. (January 2016). "On the Erigone family and the z2 secular resonance" (PDF). Monthly Notices of the Royal Astronomical Society 455 (3): 2279–2288. arXiv:1510.05551. Bibcode:2016MNRAS.455.2279C. doi:10.1093/mnras/stv2430. Retrieved July 2016. 
  8. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved July 2016. 

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