Sigma Hydrids - Misplaced Pages

Meteor shower

Sigma Hydrids
Celestial map of Hydra
Parent body	Unknown C/2023 P1 (Nishimura)?
Radiant
Constellation	Hydra
Right ascension	8 19 60
Declination	+02° 00′ 00″
Properties
Occurs during	November 22 to January 4
Date of peak	December 7
Velocity	58.8 km/s
Zenithal hourly rate	3-7
See also: List of meteor showers

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.

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.

References

^ "2023 Meteor Shower List". American Meteor Society (AMS). Retrieved 2023-09-10.
archive:
Tp = 2302476.6 converts to 1591.
Green, Daniel. "Electronic Telegram No. 5290: COMET C/2023 P1 (NISHIMURA)". Central Bureau for Astronomical Telegrams. Harvard University. Retrieved 29 August 2023.

P. Clay Sherrod; Thomas L. Koed (2012). A Complete Manual of Amateur Astronomy: Tools and Techniques for Astronomical Observations. Courier Corporation. p. 59. ISBN 978-0-486-15216-5.

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By peak date	January 4 February 8 February 10 March 14 April 17 April 22–23 April 26 May 6 June 7 June 27 July 13 July 28–29 July 30 July 31 – August 1 August 13 September 1 October 8 October 10 October 21 October 22 November 9 November 12 November 18 November 21–22 December 5–6 December 13–14 December 15 December 22
Related topics	American Meteor Society Earth-grazing fireball International Meteor Organization Meteor procession North American Meteor Network Population index Radiant Zenithal Hourly Rate
See also List of meteor showers

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