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2 External links  














346 Hermentaria






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346 Hermentaria
Orbital diagram
Discovery
Discovered byAuguste Charlois
Discovery date25 November 1892
Designations

MPC designation

(346) Hermentaria
Pronunciation/hɜːrmənˈtɛəriə/

Named after

Herment

Alternative designations

1892 P

Minor planet category

Main belt
Orbital characteristics[1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc123.38 yr (45,066 d)
Aphelion3.08 AU (460.65 Gm)
Perihelion2.51 AU (376.15 Gm)

Semi-major axis

2.80 AU (418.40 Gm)
Eccentricity0.10098

Orbital period (sidereal)

4.68 yr (1,708.5 d)

Mean anomaly

188.671°

Mean motion

0° 12m 38.578s / day
Inclination8.74967°

Longitude of ascending node

91.9628°

Argument of perihelion

292.035°
Physical characteristics
Dimensions106.52±2.2 km[1]
93.27±3.05 km[2]
Mass(6.33±0.18)×1018 kg[2]

Mean density

14.89±1.52 g/cm3[2]

Synodic rotation period

28.43 h (1.18 d)[1]
17.790 h (0.74 d)[3]
28.523 h (1.19 d)[4]

Geometric albedo

0.2189±0.009

Spectral type

S

Absolute magnitude (H)

7.13

Hermentaria (minor planet designation: 346 Hermentaria) is a very large main-belt asteroid. It was discovered by French astronomer Auguste Charlois on 25 November 1892, in Nice. It is probably named for the town of Herment in the region of Auvergne, France.[5] The asteroid is orbiting the Sun with a period of 4.68 years and an eccentricity (ovalness) of 0.10. The orbital planeisinclined by 8.7° to the plane of the ecliptic.

This body has a rotation periodof28.523±0.001 h during which it varies in brightness with an amplitudeof0.14±0.01 magnitude.[4] It has a cross-section diameter of ~100 km. 346 Hermentaria is classified as a (stony) S-type asteroid, indicating a siliceous mineralogical composition. The near infrared spectra of this object show absorption features that suggest a mix of the minerals clinopyroxene and orthopyroxene.[6] It may be thermally–evolved, having at least partially melted at some point.[7] The overall shape resembles a prolate spheroid.[3]

References[edit]

  1. ^ a b c "346 Hermentaria (1892 P)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory1. Retrieved 11 May 2016.
  • ^ a b c Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science, 73: 98–118, arXiv:1203.4336, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009. See Table 1.
  • ^ a b Wang, Xiaobin; et al. (January 2016), "Studies for slowly rotating asteroids (168) Sibylla and (346) Hermentaria", Asteroids: New Observations, New Models, Proceedings of the International Astronomical Union, IAU Symposium, vol. 318, pp. 185–192, Bibcode:2016IAUS..318..185W, doi:10.1017/S1743921315008777
  • ^ a b Pilcher, Frederick (July 2016), "Rotation Period Determinations for 123 Brunhild, 314 Rosalia 346 Hermentaria, 633 Zelima, and 730 Athanasia", Bulletin of the Minor Planets Section of the Association of Lunar and Planetary Observers, 43 (3): 222−224, Bibcode:2016MPBu...43..222P
  • ^ Schmadel, Lutz D. (11 November 2013), Dictionary of Minor Planet Names, Berlin Heidelberg: Springer, p. 66, ISBN 9783662066157
  • ^ Hardersen, Paul S.; et al. (March 2006), "Near-infrared spectral observations and interpretations for S-asteroids 138 Tolosa, 306 Unitas, 346 Hermentaria, and 480 Hansa", Icarus, 181 (1): 94–106, Bibcode:2006Icar..181...94H, doi:10.1016/j.icarus.2005.10.003
  • ^ Hardersen, P. S.; et al. (March 2005), "Detailed Mineralogical Characterizations of Four S-Asteroids: 138 Tolosa, 306 Unitas, 346 Hermentaria, and 480 Hansa", 36th Annual Lunar and Planetary Science Conference, March 14–18, 2005, in League City, Texas, vol. 1240, Bibcode:2005LPI....36.1240H
  • External links[edit]


    Retrieved from "https://en.wikipedia.org/w/index.php?title=346_Hermentaria&oldid=1191813255"

    Categories: 
    Minor planet object articles (numbered)
    S-type asteroids (Tholen)
    S-type asteroids (SMASS)
    Background asteroids
    Discoveries by Auguste Charlois
    Named minor planets
    Astronomical objects discovered in 1892
    Hidden categories: 
    Articles with short description
    Short description matches Wikidata
    Use dmy dates from October 2019
    Articles with JPL SBDB identifiers
    Articles with MPC identifiers
     



    This page was last edited on 26 December 2023, at 00:07 (UTC).

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