Νότιοι & Βόρειοι Ταυρίδες 07 (25 Σεπτεμβριου - 25 Νοεμβρ

[Bi2L]

Παιδιά ας ευχηθούμε να έχει καλό καιρό!!!

Οπως εγραψα οι Ταυριδες εχουν ιδει αρχισει να πεφτουν αλλα εχουν μεγιστο στις 5 Νοεμβριου οι Νότιοι και στις 12 Νοεμβριου οι Βόρειοι.

Και οπως αναφαιρει το ΙΜΟ.net εχουν ως εξής:

 

Southern Taurids (STA)

Active: September 25 —November 25

Maximum: November 5 (λ = 223°)

ZHR = 5

Radiant: α = 052°; δ = +13°

Radiant drift: see Table 6

v∞ = 27 km/s

r = 2.3

TFC: Choose fields on the ecliptic and ~ 10° E or W of the radiants (β > 40° S)

 

Northern Taurids (NTA)

Active: September 25 —November 25

Maximum: November 12 (λ = 230°)

ZHR = 5

Radiant: α = 058°; δ = +22°

Radiant drift: see Table 6

v∞ = 29 km/s

r = 2.3

TFC: as Southern Taurids

 

These two streams form part of the complex associated with Comet 2P/Encke. Defining their radiants is best achieved by careful visual or telescopic plotting, or imaging recordings, since they are large and diffuse. They have recently been studied using IMO data by Mihaela Triglav. The Taurid radiants coincide very closely with the diffuse Antihelion Source; it is actually not possible to distinguish them. The Antihelion Source — although active all year round — should not be reported during the activity period of the Taurids.

 

The brightness and relative slowness of many Taurid meteors makes them ideal targets for still-imaging, while these factors coupled with low, steady, combined Taurid rates makes them excellent targets for newcomers to practice their plotting techniques on. The activity of both showers produces an apparently plateau-like maximum for about ten days in early November, and they have a reputation for producing some excellently bright fireballs at times, although seemingly not in every year. Studies by David Asher have indicated that increased Taurid fireball rates may result from a “swarm” of larger particles within the Taurid stream complex, and he suggested such “swarm” returns might happen in 1995, 1998 and 2005 most recently. In 1995, an impressive crop of bright Taurids occurred between late October to mid November, while in 1998, Taurid ZHRs reached levels comparable to the usual maximum rates in late October, together with an increased flux of brighter Taurids generally. The 2005 event was the most impressive and best-observed yet, with a lot of, occasionally very brilliant, fireballs, and enhanced combined ZHRs of ~ 10 —15, that persisted from about October 29 to November 10. Late October into early November has a full to last quarter Moon in 2007, but this will clear away nicely to allow dark skies for the usual maximum spell in November. Luckily, the next potential October-November “swarm” return is not anticipated till 2008, though coverage to ensure unexpected events are not happening in other years remains valuable. The near-ecliptic radiants for both shower branches mean all meteoricists can observe these showers. Northern hemisphere observers are somewhat better-placed, as here suitable radiant zenith distances persist for much of the late autumnal nights. Even in the southern hemisphere, a good 3 —5 hours' watching around local midnight is possible with Taurus well above the horizon, however.