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Post Info TOPIC: October 2010


Posts: 131433
RE: October 2010


Halloween, the word itself, is a contracted corruption of All Hallows Eve. It actually has its origins in the Celtic New Year. The holiday was called Samhain (Sah-ween). The date marked the beginning of winter. The Celts believed that at the time of Samhain, more so than any other time of the year, the ghosts of the dead were able to mingle with the living, because at Samhain the souls of those who had died during the year travelled into the other world. People gathered to sacrifice animals, fruits, and vegetables. They also lit bonfires in honour of the dead, to aid them on their journey. Here are a few deepsky objects to look out for:

In Aquila , "The Ghost of the Moon Nebula"
In Cetus, NGC246 called "The Skull Nebula".
In Bootes (abbreviated "BOO"), you may find The Spider Galaxy, NGC5829 .



Posts: 131433

Meteor Showers

There are many minor meteor showers this month...
Orionids produce rates of 5-15/hour with occasional surges in activity that may reach 25 or even 50/hour. The shower's radiant near Betelgeuse is best-placed just before morning twilight begins. Its radiant is R.A. 6hr 20m Dec +16 degrees, which is close to Xi Orionis. They're from Halley's Comet. October 15-29 2003 Maximum Oct. 21.
Draconids have produced two major storms in 1933 and 1946, and several other significant outbursts. Draconids are very slow meteors. The parent body of the meteors is Comet Giacobini-Zinner. October 6-10, Maximum Oct. 9/10
Epsilon Geminids On the 18th, the radiant will be at RA 6h 48m, Dec +27, several degrees north of the star epsilon Gemini, (Mebsuta). These are fast meteors, at about 70 km per second. These meteors might be associated with either Comet Ikeya, C/1964 N1, or Comet Nishikawa-Takamizawa-Tago, C/1987 B1. ZHR rates for this shower are about 2 meteors per hour at maximum. October 10-27 Maximum Oct. 18/19
The Sextanids are active September 9 through October 9. Though, this one is more of a radio/radar shower
The northern Taurids and southern Taurids start to become active about October 1st, but do not reach maximums until early November. Both have fairly slow meteors, with the northern Taurids velocity at 29 km per second, and the southern at 27 km per second. At maximum in November, both showers will peak at about ZHR rates of 5 meteors per hour. These meteors are part of the Taurid stream which in turn has been associated with Comet Encke.

Shower Activity Period Maximum Radiant Velocity ZHR
DateR.A. Dec. km/s
OrionidsOct 216h20m1625
SextantidsSept 24-Oct 9Oct 210.5h-8.729.8km/s9
Eta CetidsSept 20-Nov 2Oct. 1-5383
October CygnidsSept 22-Oct 11Oct. 4-9
ArietidsSept-OctOct 8/9
Delta Aurigidsfrom Sept 22-OctOct. 6-1564km/s23
DraconidsOctober 6-10Oct. 9/1017.8h78.128.7km/s35
Epsilon GeminidsOctober 10-27Oct. 18/196h48m2766km/s2
Leo Minorids
Northern Piscids3
The SextanidsSept 9-Oct 9
Northern TauridsOct 1 - NovNovember3.2h17.529km/s5
Southern TauridsOct 1 - NovNovember27km/s5

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