Sigma Hydrids

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Sigma Hydrids
Hydra constellation map.svg
Celestial map of Hydra
Parent bodyUnknown
C/2023 P1 (Nishimura)?
Radiant
Constellation Hydra
Right ascension 8h 19m 60s
Declination +02° 00 00
Properties
Occurs duringNovember 22 to January 4 [1]
Date of peakDecember 7
Velocity58.8 [1]  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. [1]

Sigma hydrids were discovered by Richard E. McCrosky and Annette Posen. [2]

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 that have had time to spread out over the comets orbit. [3]

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References

  1. 1 2 3 "2023 Meteor Shower List". American Meteor Society (AMS). Retrieved 2023-09-10.
  2. archive:
  3. Green, Daniel. "Electronic Telegram No. 5290: COMET C/2023 P1 (NISHIMURA)". Central Bureau for Astronomical Telegrams. Harvard University. Retrieved 29 August 2023.