Project for the fall.
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jimcoble2000
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Speaking of naked eye challenges. It is possible near opposition to see Jupiter’s two outer moons naked eye. Callisto can reach separations of 10 arc minutes and shines at 5.5 magnitude. This opposition is the closest in decades so its your best chance to do it.
I observed Jupiter before dawn this morning and was convinced I was seeing a moon unaided. Turns out I was possibly seeing the combined light from both Callsito and Ganymede (mag 4.4) which were extremely close to each other.
Ted BBAA Southwest
From: BackBayAstro@groups.io <BackBayAstro@groups.io> On Behalf Of jimcoble2000 via groups.io
Sent: Sunday, August 28, 2022 4:10 AM To: Roy Diffrient <mail@...>; kentblackwell <kent@...>; BBAA-Group <backbayastro@groups.io> Subject: [BackBayAstro] Project for the fall.
Anyone who would like a nice naked eye project for the next 60 days you can track Saturn and see when it reverses it's path across the sky. Currently Saturn is to the right of two naked eye stars and moving further away from them. In early November it will approach another star but never get to it. Saturn will seem to stall and then go back toward where it came from. Back toward the pair it is near now. |
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Retrograde motion after Saturn’s opposition, right?
Jeff G
From: BackBayAstro@groups.io <BackBayAstro@groups.io> On Behalf Of jimcoble2000 via groups.io
Sent: Sunday, August 28, 2022 7:10 AM To: Roy Diffrient <mail@...>; kentblackwell <kent@...>; BBAA-Group <backbayastro@groups.io> Subject: [BackBayAstro] Project for the fall.
Anyone who would like a nice naked eye project for the next 60 days you can track Saturn and see when it reverses it's path across the sky. Currently Saturn is to the right of two naked eye stars and moving further away from them. In early November it will approach another star but never get to it. Saturn will seem to stall and then go back toward where it came from. Back toward the pair it is near now. |
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jimcoble2000
oh jeez I need to think
On Tuesday, August 30, 2022 at 04:35:56 PM EDT, Jeff Goldstein <jeffgold1@...> wrote:
Retrograde motion after Saturn’s opposition, right?
Jeff G
From: BackBayAstro@groups.io <BackBayAstro@groups.io> On Behalf Of jimcoble2000 via groups.io
Sent: Sunday, August 28, 2022 7:10 AM To: Roy Diffrient <mail@...>; kentblackwell <kent@...>; BBAA-Group <backbayastro@groups.io> Subject: [BackBayAstro] Project for the fall.
Anyone who would like a nice naked eye project for the next 60 days you can track Saturn and see when it reverses it's path across the sky. Currently Saturn is to the right of two naked eye stars and moving further away from them. In early November it will approach another star but never get to it. Saturn will seem to stall and then go back toward where it came from. Back toward the pair it is near now. |
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MICHAEL CHESSON
For Saturn, retrograde technically starts and ends about 2 months before to 2 months after opposition. This year it began June 5 and continues until October 23.
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-Mike On Aug 30, 2022, at 5:16 PM, jimcoble2000 via groups.io <jimcoble2000@...> wrote:
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jimcoble2000
Thanks Mike. My brain is soft and I was going to have to run my planetarium program! Two months afterwards sound right. Most of the motion is the Earth and not Saturn's.
On Tuesday, August 30, 2022 at 05:37:02 PM EDT, MICHAEL CHESSON via groups.io <mikechesson@...> wrote:
For Saturn, retrograde technically starts and ends about 2 months before to 2 months after opposition. This year it began June 5 and continues until October 23. -Mike On Aug 30, 2022, at 5:16 PM, jimcoble2000 via groups.io <jimcoble2000@...> wrote:
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