Sigma Hydrids
{{Short description|Meteor shower}}
{{Infobox meteor shower
| name = Sigma Hydrids
| image = Hydra constellation map.svg
| caption = Celestial map of Hydra
| pronounce =
| date =
| parent = Unknown
C/2023 P1 (Nishimura)?
| constellation = Hydra
| ra ={{Deg2HMS|125|sup=yes}}
| dec ={{DEC|+02|00|00}}
| month = November 22 to January 4
| peak = December 7
| zhr = 3-7
| notes =
}}
Sigma Hydrids are a faint, minor (Class II) meteor shower that peak around 7 December. The ZHR is 3-7 and population index is 3. They are active from November 22 to January 4.
Sigma hydrids were discovered by Richard E. McCrosky and Annette Posen.[http://meteorshowersonline.com/showers/sigma_hydrids.html] archive:[https://web.archive.org/web/20170916022120/http://www.meteorshowersonline.com/showers/sigma_hydrids.html]
2023
Long-period comet C/2023 P1 (Nishimura) has been suggested to be the parent body of the meteor shower and came to perihelion (closest approach to the Sun) in September 2023. There is a chance of increased activity during the 2023 meteor shower if Earth passes through older meteoroid streams (such as 1591) that have had time to spread out over the comets orbit.{{cite web |last1=Green |first1=Daniel |title=Electronic Telegram No. 5290: COMET C/2023 P1 (NISHIMURA) |url=http://www.cbat.eps.harvard.edu/iau/cbet/005200/CBET005290.txt |website=Central Bureau for Astronomical Telegrams |publisher=Harvard University |access-date=29 August 2023}}
References
{{Reflist|refs=
|title = 2023 Meteor Shower List
|publisher = American Meteor Society (AMS)
|url = https://www.amsmeteors.org/meteor-showers/2020-meteor-shower-list/
|accessdate = 2023-09-10}}
}}
- {{cite book|author1=P. Clay Sherrod|author2=Thomas L. Koed|title=A Complete Manual of Amateur Astronomy: Tools and Techniques for Astronomical Observations|url=https://books.google.com/books?id=CjTDAgAAQBAJ&pg=PT100|year=2012|page=59|publisher=Courier Corporation|isbn=978-0-486-15216-5}}
{{Meteor showers}}
Category:Hydra (constellation)
{{meteoroid-stub}}