756 Lilliana

756 Lilliana
Discovery[1]
Discovered by Joel Hastings Metcalf
Discovery site Taunton, Massachusetts
Discovery date April 26, 1908
Designations
MPC designation 756
1908 DC[2]
main belt
Orbital characteristics[3]
Epoch November 30, 2008
Aphelion 3.667 AU
Perihelion 2.7213 AU
3.19419 AU
Eccentricity 0.148037
2085.16 days (5.71 years)
157.352°
Inclination 20.354°
208.12°
5.988°
Physical characteristics
Dimensions 71.50 ± 1.4 km (44.43 ± 0.87 mi)
Mean diameter[4]
9.361 ± 0.002 hours [5]
Albedo 0.0500 ± 0.002 [4]
9.6 [6]

    756 Lilliana is a minor planet orbiting the Sun that was discovered by American astronomer Joel Hastings Metcalf on April 26, 1908 from Taunton, Massachusetts. It rotates around its axis of rotation every 9.3 hours.[5]

    Photometric observations of this asteroid at Palmer Divide Observatory in Colorado Springs, Colorado during 2007 gave a light curve with a period of 9.262 ± 0.001 hours and a brightness variation of 0.83 ± 0.03 in magnitude.[7] A 2012 study based upon observations at the Organ Mesa Observatory in Las Cruces, New Mexico during 2012 produced a conflicting period of 7.834 ± 0.001 hours and a brightness variation of 0.17 ± 0.02 in magnitude. Further study will be needed to resolve the discrepancies in period and amplitude.[8]

    References

    1. ↑ "Numbered Minor Planets 1–5000", Discovery Circumstances (IAU Minor Planet center), retrieved 2013-04-07.
    2. ↑ Yeomans, Donald K., "756 Lilliana", JPL Small-Body Database Browser (NASA Jet Propulsion Laboratory), retrieved 2013-04-07.
    3. ↑ "(756) Lilliana". AstDyS. Italy: University of Pisa. Retrieved December 12, 2008.
    4. ↑ 4.0 4.1 Tedesco et al. (2004). "Supplemental IRAS Minor Planet Survey (SIMPS)". IRAS-A-FPA-3-RDR-IMPS-V6.0. Planetary Data System. Archived from the original on 21 January 2009. Retrieved January 7, 2009.
    5. ↑ 5.0 5.1 Székely; Kiss, L; Szabo, G; Sarneczky, K; Csak, B; Varadi, M; Meszaros, S et al. (2005). "CCD photometry of 23 minor planets" (ABSTACT). Planetary and Space Science 53 (9): 925–936. arXiv:astro-ph/0504462. Bibcode:2005P&SS...53..925S. doi:10.1016/j.pss.2005.04.006. web preprint
    6. ↑ Tholen (2007). "Asteroid Absolute Magnitudes". EAR-A-5-DDR-ASTERMAG-V11.0. Planetary Data System. Archived from the original on 1 December 2008. Retrieved January 7, 2009.
    7. ↑ Warner, Brian D. (June 2008), "Asteroid Lightcurve Analysis at the Palmer Divide Observatory - June - October 2007", Bulletin of the Minor Planets Section of the Association of Lunar and Planetary Observers 35 (2): 56–60, Bibcode:2008MPBu...35...56W.
    8. ↑ Pilcher, Frederick (October 2012), "Rotation Period Determinations for 47 Aglaja, 252 Clementina, 611 Valeria, 627 Charis, and 756 Lilliana", Planetary and Space Science 39: 220–222, Bibcode:2012MPBu...39..220P.