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Contents

   



(Top)
 


1 About  





2 See also  





3 References  





4 External links  














100 Hekate






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From Wikipedia, the free encyclopedia
 


100 Hekate
orbit
Discovery
Discovered byJ. C. Watson
Discovery date11 July 1868
Designations

MPC designation

(100) Hekate
Pronunciation/ˈhɛkət/[1]

Named after

Hecate

Alternative designations

1955 QA

Minor planet category

Main belt
AdjectivesHekatean (Hecatæan) /hɛkəˈtən/[1]
Orbital characteristics[2]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc144.93 yr (52936 d)
Aphelion3.61005 AU (540.056 Gm)
Perihelion2.56919 AU (384.345 Gm)

Semi-major axis

3.08962 AU (462.201 Gm)
Eccentricity0.16844

Orbital period (sidereal)

5.43 yr (1983.6 d)

Mean anomaly

64.6430°

Mean motion

0° 10m 53.357s / day
Inclination6.42957°

Longitude of ascending node

127.199°

Argument of perihelion

184.736°
Earth MOID1.55453 AU (232.554 Gm)
Jupiter MOID1.66378 AU (248.898 Gm)
TJupiter3.194
Physical characteristics
Dimensions88.66±2.0 km[2]
89 km[3]
Mass~1.0×1018kg

Mean density

~2.7 g/cm3 (estimate)[4]

Equatorial surface gravity

~0.033 m/s2

Equatorial escape velocity

~0.054 km/s

Synodic rotation period

27.066 h (1.1278 d)[2]
0.5555 d[5]

Geometric albedo

0.1922±0.009[2]
0.192[3]
Temperature~154 K
max: 238K (-35°C)

Spectral type

S-type asteroid

Absolute magnitude (H)

7.67

Hekate (minor planet designation: 100 Hekate) is a large main-belt asteroid.

About

[edit]
3D convex shape model of Hekate

This is a stony S-type asteroid with a diameter of 87+5
−4
 km
and a sidereal rotation periodof27.07 h.[6] It orbits in the same region of space as the Hygiea asteroid family, though it is actually an unrelated interloper. However, its geometric albedoof0.22±0.03[6] is too high, and it is of the wrong spectral class to be part of the dark carbonaceous Hygiea family. It is listed as a member of the Hecuba group of asteroids that orbit near the 2:1 mean-motion resonance with Jupiter.[7]

Hekate was the 100th asteroid to be discovered, by Canadian-American astronomer J. C. Watson (his fourth discovery) on July 11, 1868.[8] It is named after Hecate, the goddess of witchcraftinGreek mythology, but its name also commemorates it as the hundredth asteroid, as ἑκατόν (hekaton) is Greek for 'hundred'.

A Hekatean occultation of a star was observed on July 14, 2003, from New Zealand.

See also

[edit]

References

[edit]
  1. ^ a b "Hecate". Oxford English Dictionary (Online ed.). Oxford University Press. (Subscription or participating institution membership required.)
  • ^ a b c d "100 Hekate". JPL Small-Body Database. Jet Propulsion Laboratory. SPK-ID: 2000100. Retrieved 12 May 2016.
  • ^ a b "IRAS Minor Planet Survey". Archived from the original on 11 December 2005.
  • ^ Krasinsky, G. A. (2002). "Hidden Mass in the Asteroid Belt". Icarus. 158 (1): 98. Bibcode:2002Icar..158...98K. doi:10.1006/icar.2002.6837.
  • ^ "Asteroid Lightcurve Parameters".
  • ^ a b Marciniak, A.; et al. (May 2019). "Thermal properties of slowly rotating asteroids: results from a targeted survey". Astronomy & Astrophysics. 625: 40. arXiv:1905.06056. Bibcode:2019A&A...625A.139M. doi:10.1051/0004-6361/201935129. S2CID 146059739. A139.
  • ^ McDonald, S. L. (1948). "General perturbations and mean elements, with representations of 35 minor planets of the Hecuba group". The Astronomical Journal. 53: 199. Bibcode:1948AJ.....53..199M. doi:10.1086/106097.
  • ^ "Discovery Circumstances: Numbered Minor Planets 1–5000". IAU Minor Planet Center. Retrieved 7 April 2013.
  • [edit]
    Retrieved from "https://en.wikipedia.org/w/index.php?title=100_Hekate&oldid=1191751570"

    Categories: 
    Minor planet object articles (numbered)
    S-type asteroids (SMASS)
    S-type asteroids (Tholen)
    Discoveries by James Craig Watson
    Named minor planets
    Astronomical objects discovered in 1868
    Objects observed by stellar occultation
    Hecate
    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 25 December 2023, at 14:59 (UTC).

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