15268 Wendelinefroger

15268 Wendelinefroger
Discovery [1]
Discovered by E. W. Elst
Discovery site ESO's 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 13 January 2016 (JD 2457400.5)
Uncertainty parameter 0
Observation arc 13145 days (35.99 yr)
Aphelion 2.9217 AU (437.08 Gm)
Perihelion 1.8096 AU (270.71 Gm)
2.3657 AU (353.90 Gm)
Eccentricity 0.23505
3.64 yr (1329.0 d)
8.4613°
0° 16m 15.132s / day
Inclination 2.7542°
144.06°
210.31°
Known satellites 1 [4][lower-alpha 1]
Earth MOID 0.803386 AU (120.1848 Gm)
Jupiter MOID 2.50958 AU (375.428 Gm)
Jupiter Tisserand parameter 3.509
Physical characteristics
Dimensions 3.41 km (calculated)[3]
2.4224±0.0001 h[5]
0.20 (assumed)[3]
S [3]
14.7[1]

    15268 Wendelinefroger, provisional designation 1990 WF3, is a stony, spheroidal, and binary[lower-alpha 1] asteroid from the inner regions of the asteroid belt, about 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.[6]

    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 is tilted by 3 degrees to the plane of the ecliptic and shows a relatively high eccentricity of 0.24.[1] A light-curve analysis at the Leura Observatory in Australia rendered a rotation period of 2.4 hours with a low brightness amplitude of 0.07 in magnitude, which indicates that the asteroid is of nearly spheroidal shape.[5] It has an albedo of 0.20, as assumed by the Collaborative Asteroid Lightcurve Link (CALL), which is a typical value for bodies with a stony surface composition.[3]

    In 2008, a minor-planet moon was discovered orbiting Wendelinefroger at a distance of 8.7 kilometers and with an orbital period of 25.07±0.02 hours.[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 would render an estimated diameter of 0.8 kilometer or more for the asteroid's moon, using CALL's calculated diameter of 3.4 kilometer for the primary body.

    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]

    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)" (2015-11-13 last obs.). Jet Propulsion Laboratory. Retrieved 9 April 2016.
    2. 1 2 Schmadel, Lutz D. (2009). Dictionary of Minor Planet Names, Addendum to Fifth Edition: 2006–2008 – (15268) Wendelinefroger. Springer Berlin Heidelberg. p. 69. ISBN 978-3-642-01964-7. Retrieved January 2016.
    3. 1 2 3 4 5 "LCDB Data for (15268) Wendelinefroger". Asteroid Lightcurve Database (LCDB). Retrieved January 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 January 2016.
    6. ↑ "15268 Wendelinefroger (1990 WF3)". Minor Planet Center. Retrieved January 2016.

    External links


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