108 Hecuba
| Discovery | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Discovered by | R. Luther | ||||||||||||
| Discovery date | 2 April 1869 | ||||||||||||
| Designations | |||||||||||||
Named after | Hecuba | ||||||||||||
| Main belt | |||||||||||||
| Orbital characteristics[1] | |||||||||||||
| Epoch 31 July 2016 (JD 2457600.5) | |||||||||||||
| Uncertainty parameter 0 | |||||||||||||
| Observation arc | 135.87 yr (49628 d) | ||||||||||||
| Aphelion | 3.4190 AU (511.48 Gm) | ||||||||||||
| Perihelion | 3.05922 AU (457.653 Gm) | ||||||||||||
| 3.23912 AU (484.565 Gm) | |||||||||||||
| Eccentricity | 0.055539 | ||||||||||||
| 5.83 yr (2129.3 d) | |||||||||||||
| 166.649° | |||||||||||||
| 0° 10m 8.648s / day | |||||||||||||
| Inclination | 4.2204° | ||||||||||||
| 350.014° | |||||||||||||
| 204.634° | |||||||||||||
| Earth MOID | 2.05833 AU (307.922 Gm) | ||||||||||||
| Jupiter MOID | 1.55152 AU (232.104 Gm) | ||||||||||||
| TJupiter | 3.178 | ||||||||||||
| Physical characteristics | |||||||||||||
| Dimensions | 64.97±4.4 km[1] 65 km[2] | ||||||||||||
| Mass | ~3.9×1017 kg (estimate) | ||||||||||||
Mean density | ~2.7 g/cm³ (estimate)[3] | ||||||||||||
Equatorial escape velocity | ~0.040 km/s (estimate) | ||||||||||||
| 14.256 h (0.5940 d)[1] 0.60 d or 1.20 d[4] | |||||||||||||
| 0.2431±0.037 | |||||||||||||
| |||||||||||||
| S[5] | |||||||||||||
| 8.09 | |||||||||||||
108 Hecuba is a fairly large and bright main-belt asteroid. It was discovered by Karl Theodor Robert Luther on April 2, 1869,[6] and named after Hecuba, wife of King Priam in the legends of the Trojan War in Greek Mythology. It became the first asteroid discovered to orbit near a 2:1 mean-motion resonance with the planet Jupiter,[7] and is the namesake of the Hecuba group of asteroids.[8]
In the Tholen classification system, it is categorized as a stony S-type asteroid, while the Bus asteroid taxonomy system lists it as an Sw asteroid.[9] Observations performed at the Palmer Divide Observatory in Colorado Springs, Colorado in during 2007 produced a light curve with a period of 17.859 ± 0.005 hours with a brightness range of 0.11 ± 0.02 in magnitude.[10]
Hecuba orbits within the Hygiea family of asteroids but is not otherwise related to other family members because it has a silicate composition; Hygieas are dark C-type asteroids.
References
- ^ a b c Yeomans, Donald K., "108 Hecuba", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 12 May 2016.
- ^ "Archived copy". Archived from the original on 2005-12-11. Retrieved 2005-12-11.
{{cite web}}: Unknown parameter|deadurl=ignored (|url-status=suggested) (help)CS1 maint: archived copy as title (link) - ^ Krasinsky, G. A.; et al. (July 2002), "Hidden Mass in the Asteroid Belt", Icarus, 158 (1): 98–105, Bibcode:2002Icar..158...98K, doi:10.1006/icar.2002.6837. See appendix A.
- ^ Harris, A.W.; Warner, B.D.; Pravec, P., eds. (2012), "Lightcurve Derived Data", Planetary Data System, NASA, retrieved 2013-03-22.
- ^ DeMeo, Francesca E.; et al. (2011), "An extension of the Bus asteroid taxonomy into the near-infrared" (PDF), Icarus, 202 (1): 160–180, Bibcode:2009Icar..202..160D, doi:10.1016/j.icarus.2009.02.005. See appendix A.
- ^ "Numbered Minor Planets 1–5000", Discovery Circumstances, IAU Minor Planet center, retrieved 2013-04-07.
- ^ Brož, M.; Vokrouhlický, D.; Roig, F.; Nesvorný, D.; Bottke, W. F.; Morbidelli, A. (June 2005), "Yarkovsky origin of the unstable asteroids in the 2/1 mean motion resonance with Jupiter", Monthly Notices of the Royal Astronomical Society, vol. 359, no. 4, Bibcode:2005MNRAS.359.1437B, doi:10.1111/j.1365-2966.2005.08995.x.
{{citation}}: CS1 maint: unflagged free DOI (link) - ^ McDonald, Sophia Levy (June 1948), "General perturbations and mean elements, with representations of 35 minor planets of the Hecuba group", Astronomical Journal, vol. 53, p. 199, Bibcode:1948AJ.....53..199M, doi:10.1086/106097.
- ^ DeMeo, Francesca E.; et al. (July 2009), "An extension of the Bus asteroid taxonomy into the near-infrared" (PDF), Icarus, vol. 202, no. 1, pp. 160–180, Bibcode:2009Icar..202..160D, doi:10.1016/j.icarus.2009.02.005, retrieved 2013-04-08. See appendix A.
- ^ Warner, Brian D. (September 2007), "Asteroid Lightcurve Analysis at the Palmer Divide Observatory", The Minor Planet Bulletin, Bibcode:2007MPBu...34...72W.
External links
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