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100 Hekate
Main-belt asteroid
Main-belt asteroid
| Field | Value |
|---|---|
| minorplanet | yes |
| background | #D6D6D6 |
| name | 100 Hekate |
| image | 000100-asteroid shape model (100) Hekate.png |
| caption | 3D convex shape model of Hekate |
| discovery_ref | |
| discoverer | J. C. Watson |
| discovered | 11 July 1868 |
| mpc_name | (100) Hekate |
| alt_names | 1955 QA |
| named_after | Hecate |
| pronounced | |
| adjective | Hekatean (Hecatæan) |
| mp_category | Main belt |
| orbit_ref | |
| epoch | 2025 Nov 21 (JD 2461000.5) |
| aphelion | 3.60957 AU |
| perihelion | 2.57132 AU |
| semimajor | 3.09045 AU |
| eccentricity | 0.16798 |
| period | 5.433 yr (1984.4 d) |
| inclination | 6.43092° |
| asc_node | 127.156° |
| arg_peri | 183.552° |
| mean_anomaly | 323.244° |
| dimensions | |
| 89 km | |
| mass | ~1.0×1018 kg |
| density | ~2.7 g/cm3 *(estimate)* |
| surface_grav | ~0.033 m/s2 |
| escape_velocity | ~0.054 km/s |
| rotation | 27.066 h |
| 0.5555 d | |
| title | Asteroid Lightcurve Parameters |
| url | http://www.psi.edu/pds/resource/lc.html |
| spectral_type | S-type asteroid |
| abs_magnitude | 7.67 |
| albedo | |
| 0.192 | |
| single_temperature | ~154 K |
| *max:* 238K (−35 °C) | |
| mean_motion | / day |
| observation_arc | 154.56 yr (56452 d) |
| uncertainty | 0 |
| moid | 1.55453 AU |
| jupiter_moid | 1.66378 AU |
| tisserand | 3.194 |
89 km 0.5555 d 0.192 max: 238K (−35 °C)
100 Hekate is a large main-belt asteroid.
About
Hekate is a stony S-type asteroid with a diameter of and a sidereal rotation period of . It orbits in the same region of space as the Hygiea asteroid family, though it is actually an unrelated interloper. However, its geometric albedo of 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.
Hekate was the 100th asteroid to be discovered, by Canadian-American astronomer J. C. Watson (his fourth discovery) on July 11, 1868. It is named after Hecate, the goddess of witchcraft in Greek mythology, but its name also commemorates it as the hundredth asteroid, as ἑκατόν (hekaton) is Greek for 'hundred'.
An occultation of a star by Hekate was observed on July 14, 2003, from New Zealand.
References
References
- {{OED. Hecate
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