Sigma Hydrids
| Sigma Hydrids | |
|---|---|
 Celestial map ofHydra | |
| Parent body | Unknown C/2023 P1 (Nishimura)? |
| Radiant | |
| Constellation | Hydra |
| Right ascension | 8h19m60s |
| Declination | +02° 00′ 00″ |
| Properties | |
| Occurs during | November 22 to January 4[1] |
| Date of peak | December 7 |
| Velocity | 58.8[1]km/s |
| Zenithal hourly rate | 3-7 |
Sigma Hydridsare a faint, minor (Class II)meteor showerthat peak around 7 December. TheZHRis 3-7 andpopulation indexis 3. They are active from November 22 to January 4.[1]
Sigma hydrids were discovered byRichard E. McCroskyandAnnette Posen.[2]
2023
[edit]Long-period cometC/2023 P1 (Nishimura)has been suggested to be the parent body of the meteor shower and came toperihelion(closest approach to the Sun) in September 2023. There is a chance of increased activity during the 2023 meteor shower if Earth passes through oldermeteoroid streams(such as 1591)[3]that have had time to spread out over the comets orbit.[4]
References
[edit]- ^abc"2023 Meteor Shower List".American Meteor Society(AMS).Retrieved2023-09-10.
- ^[1]archive:[2]
- ^Tp= 2302476.6 converts to1591.
- ^Green, Daniel."Electronic Telegram No. 5290: COMET C/2023 P1 (NISHIMURA)".Central Bureau for Astronomical Telegrams.Harvard University.Retrieved29 August2023.
- P. Clay Sherrod; Thomas L. Koed (2012).A Complete Manual of Amateur Astronomy: Tools and Techniques for Astronomical Observations.Courier Corporation. p. 59.ISBN978-0-486-15216-5.
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