15258 Alfilipenko

15258 Alfilipenko, provisional designation 1990 RN17, is a carbonaceous background asteroid from the outer region of the asteroid belt, approximately 12 kilometers in diameter. It was discovered on 15 September 1990, by Russian–Ukraininan astronomer Lyudmila Zhuravleva at the Crimean Astrophysical Observatory, Nauchnyj, on the Crimean peninsula.[8] The asteroid was named after Russian civil engineer Aleksandr Filipenko.[2]

15258 Alfilipenko
Discovery [1]
Discovered byL. V. Zhuravleva
Discovery siteCrimean Astrophysical Obs.
Discovery date15 September 1990
Designations
(15258) Alfilipenko
Named after
Aleksandr Filipenko
(Russian civil engineer)[2]
1990 RN17 · 1998 BJ11
main-belt · (outer) [1]
background
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc26.63 yr (9,726 days)
Aphelion3.7790 AU
Perihelion2.7040 AU
3.2415 AU
Eccentricity0.1658
5.84 yr (2,132 days)
267.12°
0° 10m 8.04s / day
Inclination6.7272°
294.01°
31.763°
Physical characteristics
Dimensions11.29 km (calculated)[3]
12.059±0.379 km[4][5]
4.3655±0.0016 h[6]
0.057 (assumed)[3]
0.084±0.011[4][5]
C [3]
12.74±0.59[7] · 12.9[4] · 13.014±0.002 (R)[6] · 13.1[1] · 13.46[3]

    Orbit and classification

    Alfilipenko orbits the Sun in the outer main-belt at a distance of 2.7–3.8 AU once every 5 years and 10 months (2,132 days). Its orbit has an eccentricity of 0.17 and an inclination of 7° with respect to the ecliptic.[1] No precoveries were taken. The asteroid's observation arc begins with its official discovery observation.[8]

    Physical characteristics

    Lightcurves

    A rotational lightcurve of Alfilipenko was obtained from photometric observations made at the U.S. Palomar Transient Factory in October 2013. Lightcurve analysis gave a rotation period of 4.3655 hours with a brightness variation of 0.11 magnitude (U=2).[6]

    Diameter and albedo

    According to the survey carried out by the NEOWISE mission of NASA's space-based Wide-field Infrared Survey Explorer, Alfilipenko measures 12.1 kilometers in diameter and its surface has an albedo of 0.084,[4] while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous asteroids of 0.057 and calculates a diameter of 11.3 kilometers with an absolute magnitude of 13.46.[3]

    Naming

    This minor planet was named in honour of Russian civil engineer Aleksandr Vasil'evich Filipenko (born 1950) from Khanty-Mansiysk, Siberia. He is the chairman of a charitable foundation for the memory of Alexander Danilovich Menshikov (1673–1729), after whom the minor planet 3889 Menshikov is named.[2] The official naming citation was published by the Minor Planet Center on 13 July 2004 (M.P.C. 52323).[9]

    gollark: Pointers? Also unvaried integers.
    gollark: Why have a `float` type when you could just have float division or something?
    gollark: Bestest idea: literally everything is an integer with no type (except maybe size), and you can do any operation on any value.
    gollark: It should be implicit, for safety.
    gollark: No, not a meta-instruction-pointer, there are instructions for instruction pointer forking/killing.

    References
    1. "JPL Small-Body Database Browser: 15258 Alfilipenko (1990 RN17)" (2017-05-02 last obs.). Jet Propulsion Laboratory. Retrieved 26 June 2017.
    2. Schmadel, Lutz D. (2006). "(15258) Alfilipenko [3.23, 0.18, 6.8]". Dictionary of Minor Planet Names – (15258) Alfilipenko, Addendum to Fifth Edition: 2003–2005. Springer Berlin Heidelberg. p. 91. doi:10.1007/978-3-540-34361-5_934. ISBN 978-3-540-34360-8.
    3. "LCDB Data for (15258) Alfilipenko". Asteroid Lightcurve Database (LCDB). Retrieved 11 May 2016.
    4. 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. Retrieved 11 May 2016.
    5. 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 3 December 2016.
    6. 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 11 May 2016.
    7. 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 11 May 2016.
    8. "15258 Alfilipenko (1990 RN17)". Minor Planet Center. Retrieved 11 May 2016.
    9. "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 11 May 2016.

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