100 Hekate
{{Short description|Main-belt asteroid}}
{{Use dmy dates|date=October 2019}}
{{Infobox planet
| minorplanet = yes
| background = #D6D6D6
| name = 100 Hekate
| image = Орбита астероида 100.png
| caption = orbit
| discoverer = J. C. Watson
| discovered = 11 July 1868
| mpc_name = (100) Hekate
| alt_names = 1955 QA
| named_after = Hecate
| pronounced = {{IPAc-en|ˈ|h|ɛ|k|ə|t|iː}}{{OED|Hecate}}
| adjective = Hekatean (Hecatæan) {{IPAc-en|h|ɛ|k|ə|ˈ|t|iː|ə|n}}
| mp_category = Main belt
| epoch = 31 July 2016 (JD 2457600.5)
| aphelion = {{Convert|3.61005|AU|Gm|abbr=on|lk=on}}
| perihelion = {{Convert|2.56919|AU|Gm|abbr=on}}
| semimajor = {{Convert|3.08962|AU|Gm|abbr=on}}
| eccentricity = 0.16844
| inclination = 6.42957°
| asc_node = 127.199°
| arg_peri = 184.736°
| mean_anomaly = 64.6430°
| avg_speed =
| dimensions = {{val|88.66|2.0|ul=km}}
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 = {{Convert|27.066|h|d|abbr=on|lk=on}}
0.5555 d
{{cite web
|title=Asteroid Lightcurve Parameters
|url=http://www.psi.edu/pds/resource/lc.html
}}
| spectral_type = S-type asteroid
| abs_magnitude = 7.67
| albedo = {{val|0.1922|0.009}}
0.192
| single_temperature = ~154 K
max: 238K (-35°C)
| mean_motion = {{Deg2DMS|0.181488|sup=ms}} / day
| observation_arc = 144.93 yr (52936 d)
| uncertainty = 0
| moid = {{Convert|1.55453|AU|Gm|abbr=on}}
| jupiter_moid = {{Convert|1.66378|AU|Gm|abbr=on}}
| tisserand = 3.194
}}
About
File:000100-asteroid shape model (100) Hekate.png
This is a stony S-type asteroid with a diameter of {{val|87|5|4|u=km}} and a sidereal rotation period of {{val|27.07|u=hours|fmt=commas}}. 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 {{val|0.22|0.03}} 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'.
A Hekatean occultation of a star was observed on July 14, 2003, from New Zealand.
See also
References
{{Reflist|refs=
| title=Thermal properties of slowly rotating asteroids: results from a targeted survey
| last1=Marciniak | first1=A. | last2=Alí-Lagoa | first2=V.
| last3=Müller | first3=T. G. | last4=Szakáts | first4=R.
| last5=Molnár | first5=L. | last6=Pál | first6=A.
| last7=Podlewska-Gaca | first7=E. | last8=Parley | first8=N.
| last9=Antonini | first9=P. | last10=Barbotin | first10=E.
| last11=Behrend | first11=R. | last12=Bernasconi | first12=L.
| last13=Butkiewicz-Bąk | first13=M. | last14=Crippa | first14=R.
| last15=Duffard | first15=R. | last16=Ditteon | first16=R.
| last17=Feuerbach | first17=M. | last18=Fauvaud | first18=S.
| last19=Garlitz | first19=J. | last20=Geier | first20=S.
| last21=Goncalves | first21=R. | last22=Grice | first22=J.
| last23=Grześkowiak | first23=I. | last24=Hirsch | first24=R.
| last25=Horbowicz | first25=J. | last26=Kamiński | first26=K.
| last27=Kamińska | first27=M. K. | last28=Kim | first28=D. -H.
| last29=Kim | first29=M. -J. | last30=Konstanciak | first30=I.
| last31=Kudak | first31=V. | last32=Kulczak | first32=P.
| last33=Maestre | first33=J. L. | last34=Manzini | first34=F.
| last35=Marks | first35=S. | last36=Monteiro | first36=F.
| last37=Ogłoza | first37=W. | last38=Oszkiewicz | first38=D.
| last39=Pilcher | first39=F. | last40=Perig | first40=V.
| last41=Polakis | first41=T. | last42=Polińska | first42=M.
| last43=Roy | first43=R. | last44=Sanabria | first44=J. J.
| last45=Santana-Ros | first45=T. | last46=Skiff | first46=B.
| last47=Skrzypek | first47=J. | last48=Sobkowiak | first48=K.
| last49=Sonbas | first49=E. | last50=Thizy | first50=O.
| last51=Trela | first51=P. | last52=Urakawa | first52=S.
| last53=Żejmo | first53=M. | last54=Żukowski | first54=K.
| display-authors=1 | journal=Astronomy & Astrophysics
| volume=625 | id=A139 | pages=40 | date=May 2019
| arxiv=1905.06056 | bibcode=2019A&A...625A.139M
| doi=10.1051/0004-6361/201935129 | s2cid=146059739 }}
{{cite sbdb
|title=100 Hekate
|accessdate=12 May 2016
|id=2000100
}}
{{cite web
|title=IRAS Minor Planet Survey
|url=http://www.psi.edu/pds/archive/simps.html
|archive-url=https://archive.today/20051211134758/http://www.psi.edu/pds/archive/simps.html
|url-status=dead
|archive-date=2005-12-11
}}
{{cite journal
|last1=Krasinsky |first1=G. A.
|year=2002
|title=Hidden Mass in the Asteroid Belt
|journal=Icarus
|volume=158 |issue=1
|page=98
|bibcode=2002Icar..158...98K
|doi=10.1006/icar.2002.6837
}}
{{cite journal
|last1=McDonald |first1=S. L.
|date=1948
|title=General perturbations and mean elements, with representations of 35 minor planets of the Hecuba group
|journal=The Astronomical Journal
|volume=53 |page=199
|bibcode=1948AJ.....53..199M
|doi=10.1086/106097
|url=http://adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1948AJ.....53..199M&link_type=ARTICLE&db_key=AST&high=
}}
{{cite web
|title=Discovery Circumstances: Numbered Minor Planets 1–5000
|publisher=IAU Minor Planet Center
|url=https://www.minorplanetcenter.net/iau/lists/NumberedMPs000001.html
|accessdate=2013-04-07
}}
}}
External links
- {{AstDys|100}}
- {{JPL small body}}
{{Minor planets navigator |99 Dike |number=100 |101 Helena}}
{{Small Solar System bodies}}
{{Authority control}}
{{DEFAULTSORT:000100}}
Category:S-type asteroids (SMASS)
Category:S-type asteroids (Tholen)