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Double transit WOW (EON 120)

Started by cysmarc, 08/05/2008 04:40AM
Posted 08/05/2008 04:40AM Opening Post
Hi,
Once again the target was Jupiter. Actually it still is I just had to interupt to post this.
I Think that there is a double transit of Jupiter right now.
Over the top belt there are two black dots (actually one is clearly a disc) one moon is almost attached to Jupiter (I don't know whether it has just ended a transit or is about to start one. Anyway I think that I am seeing the shadow of one moon and the actual disc of another passing by the planet.
Let me know if I'm wrong but I think that that is what I saw.
I was viewing at 57x and at 140x and 163x and 225x.
Thanx
Let me know
Posted 08/05/2008 06:02AM #1
Itz: Yes, I think you were seeing portions of a double transit. You apparently saw Callisto against the planet, and you saw Ganymede right next to Jupiter, having just emerged from transiting the planet, with Ganymede's shadow still visible against the planet.
Your message arrived here at 9:40 pm Pacific time on Monday, which I believe was 12:40 am Eastern time on Tuesday morning, or 04:40 am UT on Tuesday. According to S&T, Callisto was transisting Jupiter, beginning at 02:30 UT and ending on 06:05 UT, but its shadow would not appear on Jupiter until later in the morning; and Ganymede had begun a transit at 00:04 UT which had ended at 03:17 UT, with its shadow moving across the planet from 02:38 UT until 05:55 UT.
Good show!

NexStar 8i SCT, Orion 80ED APO refractor, Orion 120 mm EQ refractor, 3.5-inch Questar