Sigma Hydrids

Sigma Hydrids
Celestial map of Hydra
Parent bodyUnknown
C/2023 P1 (Nishimura)?
Radiant
ConstellationHydra
Right ascension8h 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 rate3-7
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 (such as 1591)[3] that have had time to spread out over the comets orbit.[4]

References

  1. ^ a b c "2023 Meteor Shower List". American Meteor Society (AMS). Retrieved 2023-09-10.
  2. ^ [1] archive:[2]
  3. ^ Tp = 2302476.6 converts to 1591.
  4. ^ Green, Daniel. "Electronic Telegram No. 5290: COMET C/2023 P1 (NISHIMURA)". Central Bureau for Astronomical Telegrams. Harvard University. Retrieved 29 August 2023.



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