108 Hecuba

108 Hecuba
Discovery
Discovered by	R. Luther
Discovery date	2 April 1869
Designations
MPC designation	(108) Hecuba
Pronunciation	/ˈhɛkjʊbə/[1]
Named after	Hecuba
Minor planet category	Main belt
Orbital characteristics[2]
	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)
Semi-major axis	3.23912 AU (484.565 Gm)
Eccentricity	0.055539
Orbital period	5.83 yr (2129.3 d)
Average orbital speed	16.53 km/s
Mean anomaly	166.649°
Mean motion	0° 10m 8.648s / day
Inclination	4.2204°
Longitude of ascending node	350.014°
Argument of perihelion	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[2]; 65 km[3]
Mass	~3.9×1017 kg (estimate)
Mean density	~2.7 g/cm³ (estimate)[4]
Equatorial surface gravity	~0.025 m/s² (estimate)
Equatorial escape velocity	~0.040 km/s (estimate)
Rotation period	14.256 h (0.5940 d)[2]; 0.60 d or 1.20 d[5]
Geometric albedo	0.2431±0.037
Spectral type	S[6]
Absolute magnitude (H)	8.09

Hecuba (minor planet designation: 108 Hecuba) is a fairly large and bright main-belt asteroid. It was discovered by Karl Theodor Robert Luther on April 2, 1869,[7] 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,[8] and is the namesake of the Hecuba group of asteroids.[9]

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.[10] 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 variation of 0.11 ± 0.02 in magnitude.[11]

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

"Hecuba". Dictionary.com Unabridged. Random House.
Yeomans, Donald K., "108 Hecuba", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 12 May 2016.
"IRAS Minor Planet Survey (IMPS)". Archived from the original on 22 December 2005. Retrieved 11 December 2005.
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 22 March 2013.
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, archived from the original (PDF) on 17 March 2014. See appendix A.
"Numbered Minor Planets 1–5000", Discovery Circumstances, IAU Minor Planet center, retrieved 7 April 2013.
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, 359 (4): 1437–1455, Bibcode:2005MNRAS.359.1437B, doi:10.1111/j.1365-2966.2005.08995.x.
McDonald, Sophia Levy (June 1948), "General perturbations and mean elements, with representations of 35 minor planets of the Hecuba group", Astronomical Journal, 53: 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, 202 (1): 160–180, Bibcode:2009Icar..202..160D, doi:10.1016/j.icarus.2009.02.005, archived from the original (PDF) on 17 March 2014, retrieved 8 April 2013. See appendix A.
Warner, Brian D. (September 2007), "Asteroid Lightcurve Analysis at the Palmer Divide Observatory", The Minor Planet Bulletin, 34 (3): 72, Bibcode:2007MPBu...34...72W.

External links

Lightcurve plot of 108 Hecuba, Palmer Divide Observatory, B. D. Warner (2007)
Asteroid Lightcurve Database (LCDB), query form (info)
Dictionary of Minor Planet Names, Google books
Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
108 Hecuba at AstDyS-2, Asteroids—Dynamic Site
- Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
108 Hecuba at the JPL Small-Body Database
- Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

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[1] "Hecuba". Dictionary.com Unabridged. Random House.

[JPL-2] Yeomans, Donald K., "108 Hecuba", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 12 May 2016.

[3] "IRAS Minor Planet Survey (IMPS)". Archived from the original on 22 December 2005. Retrieved 11 December 2005.

[Krasinsky2002-4] 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.

[PDS-5] Harris, A.W.; Warner, B.D.; Pravec, P., eds. (2012), "Lightcurve Derived Data", Planetary Data System, NASA, retrieved 22 March 2013.

[DeMeo2011-6] 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, archived from the original (PDF) on 17 March 2014. See appendix A.

[IAU_MPC-7] "Numbered Minor Planets 1–5000", Discovery Circumstances, IAU Minor Planet center, retrieved 7 April 2013.

[Broz2005-8] 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, 359 (4): 1437–1455, Bibcode:2005MNRAS.359.1437B, doi:10.1111/j.1365-2966.2005.08995.x.

[McDonald1948-9] McDonald, Sophia Levy (June 1948), "General perturbations and mean elements, with representations of 35 minor planets of the Hecuba group", Astronomical Journal, 53: 199, Bibcode:1948AJ.....53..199M, doi:10.1086/106097.

[DeMeo2009-10] DeMeo, Francesca E.; et al. (July 2009), "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, archived from the original (PDF) on 17 March 2014, retrieved 8 April 2013. See appendix A.

[Warner2007-11] Warner, Brian D. (September 2007), "Asteroid Lightcurve Analysis at the Palmer Divide Observatory", The Minor Planet Bulletin, 34 (3): 72, Bibcode:2007MPBu...34...72W.