15268 Wendelinefroger

15268 Wendelinefroger
Discovery [1]
Discovered by E. W. Elst
Discovery site La Silla Obs.
Discovery date 18 November 1990
Designations
MPC designation 15268 Wendelinefroger
Named after
 Wendeline Froger
(Belgian singer)[2]
1990 WF3 · 1979 WA7
1986 PO5 · 1999 CD133
main-belt · (inner) [3]
Orbital characteristics [1]
Epoch 16 February 2017 (JD 2457800.5)
Uncertainty parameter 0
Observation arc 36.98 yr (13,508 days)
Aphelion 2.9210 AU
Perihelion 1.8098 AU
2.3654 AU
Eccentricity 0.2349
3.64 yr (1,329 days)
116.86°
0° 16m 15.24s / day
Inclination 2.7542°
144.06°
210.28°
Known satellites 1 [4][lower-alpha 1]
Physical characteristics
Dimensions 3.41 km (calculated)[3]
2.4224±0.0001 h[5]
0.20 (assumed)[3]
S [3]
14.7[1][3] · 14.82±0.04[6]

    15268 Wendelinefroger, provisional designation 1990 WF3, is a stony, spheroidal, and binary[lower-alpha 1] asteroid from the inner regions of the asteroid belt, approximately 3.4 kilometers in diameter. It was discovered by Belgian astronomer Eric Elst at ESO's La Silla Observatory in northern Chile, on 18 November 1990.[7]

    The S-type asteroid orbits the Sun at a distance of 1.8–2.9 AU once every 3 years and 8 months (1,329 days). Its orbit has an eccentricity of 0.23 and an inclination of 3° with respect to the ecliptic.[1] It was first identified as 1979 WA7 at Crimea–Nauchnij in 1979, extending the asteroid's observation arc by 11 years prior to its discovery.[7]

    In October 2008, a rotational light-curve was obtained from photometric observations at the Leura Observatory (E17), Australia. It gave a rotation period of 2.422 hours with a low brightness variation of 0.07 magnitude, which indicates that the asteroid is of nearly spheroidal shape (U=3).[5] The Collaborative Asteroid Lightcurve Link (CALL) assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 3.4 kilometer, based on an absolute magnitude of 14.7.[3]

    During the photometric observations in 2008, a minor-planet moon was also discovered, orbiting Wendelinefroger every 25.07±0.02 hours at a distance of 8.7 kilometers.[4][5] Based on mutual occultations of Wendelinefroger and its moon, the diameter ratio for the two bodies is at least 0.24 (i.e. secondary-to-primary mean-diameter ratio),[lower-alpha 1] which translates into an estimated diameter of 0.8 kilometer or more for the asteroid's moon, using CALL's calculated diameter for the primary.

    The minor planet is named in honour of Belgian female singer Wendeline Froger (b. 1948), who has a soprano voice and performs at church celebrations, weddings and for selected audiences at her residence. She has a preference to sing Lieder by Robert Schumann, after whom the minor planet 4003 Schumann is named.[2] Naming citation was published on 12 December 2008 (M.P.C. 64563).[8]

    References

    1. 1 2 3 Central Bureau for Astronomical Telegrams - No.1542, 20 October 2008

      Photometric observations obtained during Sept. 24-Oct. 9 reveal that minor planet (15268) is a binary system with an orbital period of 25.07 +/- 0.02 hr. The primary shows a period of 2.4224 +/- 0.0001 hr, and it has a lightcurve amplitude of 0.07 mag, suggesting a nearly spheroidal shape. Mutual eclipse/occultation events indicate a lower limit on the secondary-to-primary mean-diameter ratio of 0.27.

      Reported by – J. Oey, Leura Observatory, N.S.W., Australia; P. Pravec, P. Kusnirak, and K. Hornoch, Ondrejov Observatory; R. Stephens, Goat Mountain Astronomical Research Station, Yucca Valley, CA, U.S.A.; S. Gajdos and L. Kornos, Modra Observatory; and V. Chiorny, Institute of Astronomy, Kharkiv National University, Electronic Telegram No. 1542
    1. 1 2 3 4 "JPL Small-Body Database Browser: 15268 Wendelinefroger (1990 WF3)" (2016-11-10 last obs.). Jet Propulsion Laboratory. Retrieved 3 December 2016.
    2. 1 2 Schmadel, Lutz D. (2009). Dictionary of Minor Planet Names, Addendum to Fifth Edition: 2003–2005 – (15268) Wendelinefroger. Springer Berlin Heidelberg. p. 69. ISBN 978-3-642-01964-7. Retrieved 11 November 2016.
    3. 1 2 3 4 5 6 "LCDB Data for (15268) Wendelinefroger". Asteroid Lightcurve Database (LCDB). Retrieved 11 November 2016.
    4. 1 2 Johnston, Robert. "(15268) Wendelinefroger". johnstonsarchive.net. Retrieved 29 May 2015.
    5. 1 2 3 Oey, J.; Pravec, P.; Kusnirak, P.; Hornoch, K.; Stephens, R.; Gajdos, S.; et al. (October 2008). "(15268) 1990 WF3". Central Bureau Electronic Telegrams (1542). Bibcode:2008CBET.1542....1O. Retrieved 11 November 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 11 November 2016.
    7. 1 2 "15268 Wendelinefroger (1990 WF3)". Minor Planet Center. Retrieved 11 November 2016.
    8. ↑ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 11 November 2016.

    External links

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