Re: [Utah-astronomy] Can someone check my calculations?
Thanks Kurt, That pretty much agrees with some of the data I was looking at. I was surprised to see there is only a 3 hour difference between Utah and Hawaii. I thought it was at least an hour or two more. Regarding the RA I asked about in my original post I forgot to mention my guesstimates so I'll do that now and hope I'm not embarrassingly off. At the start of our observing session on 8 February at 2100 here in SLC (1800 at Haleakala) I think RA 02h 53m will be transiting in the south as seen from the telescope. Which means when our session ends three hours later at midnight here in SLC (2100 at Haleakala) RA 05h 53m will be transiting in the south as seen from the telescope. BTW, I see that right in the middle of the session Jupiter will be virtually at the zenith. But I think it will be too bright to image with 2 meters of glass. Too bad. Cheers, patrick On 07 Jan 2013, at 23:35, Kurt Fisher wrote:
I do not have my home laptop with me with a planetarium program, so I cannot give you a specific RA. But here is a quick eyeball using referenced internet resources. Civil twilight is 49 minutes after session start. - Kurt
================ A) Algol appears to be transiting Honolulu at the session start
http://www.fourmilab.ch/cgi-bin/Yoursky
Algol is transiting Honolulu at Corresponding UTC (GMT) Saturday, February 9, 2013 at 04:00:00
================ B) Time differential
http://www.timeanddate.com/worldclock/converter.html
Salt Lake City (U.S.A. - Utah) Friday, February 8, 2013 at 9:00:00 PM MST UTC-7 hours Honolulu (U.S.A. - Hawaii) Friday, February 8, 2013 at 6:00:00 PM HAST UTC-10 hours Corresponding UTC (GMT) Saturday, February 9, 2013 at 04:00:00
================ C. Sunrise, Sunset, Moonrise
http://aa.usno.navy.mil/data/docs/RS_OneDay.php
U.S. Naval Observatory Astronomical Applications Department
Sun and Moon Data for One Day
The following information is provided for Honolulu, Honolulu County, Hawaii (longitude W157.8, latitude N21.3):
Friday 8 February 2013 Hawaii-Aleutian Standard Time
SUN Begin civil twilight 6:43 a.m. Sunrise 7:05 a.m. Sun transit 12:46 p.m. Sunset 6:26 p.m. End civil twilight 6:49 p.m.
MOON Moonset 4:11 p.m. on preceding day Moonrise 5:38 a.m. Moon transit 11:25 a.m. Moonset 5:14 p.m. Moonrise 6:27 a.m. on following day
Phase of the Moon on 8 February: waning crescent with 3% of the Moon's visible disk illuminated.
New Moon on 9 February 2013 at 9:21 p.m. (Hawaii-Aleutian Standard Time).
Hey Patrick, As Kurt has shown for Honolulu, sunset on Feb 8th isn't until 18:26 HAST. It's closer to 18:21 for Wailuku on Maui. According to timeanddate.com for Wailuku ( http://www.timeanddate.com/worldclock/ astronomy.html?n=1084&month=2&year=2013&obj=sun&afl=-1&day=1 ) the end of Nautical Twilight is at 19:10 HAST. You actually may want to use your time imaging Jupiter (no joke) before astronomical twilight. Faulkes shows many examples of Jupiter pics. As for the Hour Angle question, I get closer to RA 02h 49m and 05h 49m respectively but I think that is splitting hairs. (Or hares? Lepus is on the meridian at the end of your run!) I'm not sure how far south in declination Faulkes can image but I've seen pics of the Great Barred Spiral in Fornax NGC 1365 and the Southern Ring Nebula in Vela NGC 3132 at -36 and -40 respectively. Aloha and best of luck...I can't wait to see the results. Dave Bennett Hilo, HI On Jan 7, 2013, at 9:18 PM, Wiggins Patrick wrote:
Thanks Kurt,
That pretty much agrees with some of the data I was looking at. I was surprised to see there is only a 3 hour difference between Utah and Hawaii. I thought it was at least an hour or two more.
Regarding the RA I asked about in my original post I forgot to mention my guesstimates so I'll do that now and hope I'm not embarrassingly off.
At the start of our observing session on 8 February at 2100 here in SLC (1800 at Haleakala) I think RA 02h 53m will be transiting in the south as seen from the telescope.
Which means when our session ends three hours later at midnight here in SLC (2100 at Haleakala) RA 05h 53m will be transiting in the south as seen from the telescope.
BTW, I see that right in the middle of the session Jupiter will be virtually at the zenith. But I think it will be too bright to image with 2 meters of glass. Too bad.
Cheers,
patrick
On 07 Jan 2013, at 23:35, Kurt Fisher wrote:
I do not have my home laptop with me with a planetarium program, so I cannot give you a specific RA. But here is a quick eyeball using referenced internet resources. Civil twilight is 49 minutes after session start. - Kurt
================ A) Algol appears to be transiting Honolulu at the session start
http://www.fourmilab.ch/cgi-bin/Yoursky
Algol is transiting Honolulu at Corresponding UTC (GMT) Saturday, February 9, 2013 at 04:00:00
================ B) Time differential
http://www.timeanddate.com/worldclock/converter.html
Salt Lake City (U.S.A. - Utah) Friday, February 8, 2013 at 9:00:00 PM MST UTC-7 hours Honolulu (U.S.A. - Hawaii) Friday, February 8, 2013 at 6:00:00 PM HAST UTC-10 hours Corresponding UTC (GMT) Saturday, February 9, 2013 at 04:00:00
================ C. Sunrise, Sunset, Moonrise
http://aa.usno.navy.mil/data/docs/RS_OneDay.php
U.S. Naval Observatory Astronomical Applications Department
Sun and Moon Data for One Day
The following information is provided for Honolulu, Honolulu County, Hawaii (longitude W157.8, latitude N21.3):
Friday 8 February 2013 Hawaii-Aleutian Standard Time
SUN Begin civil twilight 6:43 a.m. Sunrise 7:05 a.m. Sun transit 12:46 p.m. Sunset 6:26 p.m. End civil twilight 6:49 p.m.
MOON Moonset 4:11 p.m. on preceding day Moonrise 5:38 a.m. Moon transit 11:25 a.m. Moonset 5:14 p.m. Moonrise 6:27 a.m. on following day
Phase of the Moon on 8 February: waning crescent with 3% of the Moon's visible disk illuminated.
New Moon on 9 February 2013 at 9:21 p.m. (Hawaii-Aleutian Standard Time).
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I suspect Jupiter would be a great target, if we shoot nice quick images. We probably could put together a video of its rotation. Sounds good to me, Dave! ________________________________ From: Dave Bennett <dlbennett@mac.com> To: Utah Astronomy <utah-astronomy@mailman.xmission.com> Sent: Tuesday, January 8, 2013 7:12 PM Subject: Re: [Utah-astronomy] Can someone check my calculations? Hey Patrick, As Kurt has shown for Honolulu, sunset on Feb 8th isn't until 18:26 HAST. It's closer to 18:21 for Wailuku on Maui. According to timeanddate.com for Wailuku ( http://www.timeanddate.com/worldclock/astronomy.html?n=1084&month=2&year=201... ) the end of Nautical Twilight is at 19:10 HAST. You actually may want to use your time imaging Jupiter (no joke) before astronomical twilight. Faulkes shows many examples of Jupiter pics. As for the Hour Angle question, I get closer to RA 02h 49m and 05h 49m respectively but I think that is splitting hairs. (Or hares? Lepus is on the meridian at the end of your run!) I'm not sure how far south in declination Faulkes can image but I've seen pics of the Great Barred Spiral in Fornax NGC 1365 and the Southern Ring Nebula in Vela NGC 3132 at -36 and -40 respectively. Aloha and best of luck...I can't wait to see the results. Dave Bennett Hilo, HI On Jan 7, 2013, at 9:18 PM, Wiggins Patrick wrote:
Thanks Kurt,
That pretty much agrees with some of the data I was looking at. I was surprised to see there is only a 3 hour difference between Utah and Hawaii. I thought it was at least an hour or two more.
Regarding the RA I asked about in my original post I forgot to mention my guesstimates so I'll do that now and hope I'm not embarrassingly off.
At the start of our observing session on 8 February at 2100 here in SLC (1800 at Haleakala) I think RA 02h 53m will be transiting in the south as seen from the telescope.
Which means when our session ends three hours later at midnight here in SLC (2100 at Haleakala) RA 05h 53m will be transiting in the south as seen from the telescope.
BTW, I see that right in the middle of the session Jupiter will be virtually at the zenith. But I think it will be too bright to image with 2 meters of glass. Too bad.
Cheers,
patrick
On 07 Jan 2013, at 23:35, Kurt Fisher wrote:
I do not have my home laptop with me with a planetarium program, so I cannot give you a specific RA. But here is a quick eyeball using referenced internet resources. Civil twilight is 49 minutes after session start. - Kurt
================ A) Algol appears to be transiting Honolulu at the session start
http://www.fourmilab.ch/cgi-bin/Yoursky
Algol is transiting Honolulu at Corresponding UTC (GMT) Saturday, February 9, 2013 at 04:00:00
================ B) Time differential
http://www.timeanddate.com/worldclock/converter.html
Salt Lake City (U.S.A. - Utah) Friday, February 8, 2013 at 9:00:00 PM MST UTC-7 hours Honolulu (U.S.A. - Hawaii) Friday, February 8, 2013 at 6:00:00 PM HAST UTC-10 hours Corresponding UTC (GMT) Saturday, February 9, 2013 at 04:00:00
================ C. Sunrise, Sunset, Moonrise
http://aa.usno.navy.mil/data/docs/RS_OneDay.php
U.S. Naval Observatory Astronomical Applications Department
Sun and Moon Data for One Day
The following information is provided for Honolulu, Honolulu County, Hawaii (longitude W157.8, latitude N21.3):
Friday 8 February 2013 Hawaii-Aleutian Standard Time
SUN Begin civil twilight 6:43 a.m. Sunrise 7:05 a.m. Sun transit 12:46 p.m. Sunset 6:26 p.m. End civil twilight 6:49 p.m.
MOON Moonset 4:11 p.m. on preceding day Moonrise 5:38 a.m. Moon transit 11:25 a.m. Moonset 5:14 p.m. Moonrise 6:27 a.m. on following day
Phase of the Moon on 8 February: waning crescent with 3% of the Moon's visible disk illuminated.
New Moon on 9 February 2013 at 9:21 p.m. (Hawaii-Aleutian Standard Time).
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On 08 Jan 2013, at 20:59, Joe Bauman wrote:
I suspect Jupiter would be a great target, if we shoot nice quick images. We probably could put together a video of its rotation. Sounds good to me, Dave!
Initially I did not think the 2 meter was supposed to be used on things as bright as Jupiter. However I just found this in their archives: http://lcogt.net/observations/ogg/2m0a/12201 So it has been done. patrick
They probably use a different imager for brighter objects, or a different optical configuration, or both. The target parameters specified for us may be determined by what the scope is configured for on that night. On Jan 8, 2013 9:35 PM, "Wiggins Patrick" <paw@wirelessbeehive.com> wrote:
On 08 Jan 2013, at 20:59, Joe Bauman wrote:
I suspect Jupiter would be a great target, if we shoot nice quick images. We probably could put together a video of its rotation. Sounds good to me, Dave!
Initially I did not think the 2 meter was supposed to be used on things as bright as Jupiter. However I just found this in their archives: http://lcogt.net/observations/ogg/2m0a/12201
So it has been done.
patrick _______________________________________________ Utah-Astronomy mailing list http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy
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You can handle very bright objects with really short exposures, I think. ________________________________ From: Chuck Hards <chuck.hards@gmail.com> To: Utah Astronomy <utah-astronomy@mailman.xmission.com> Sent: Tuesday, January 8, 2013 10:12 PM Subject: Re: [Utah-astronomy] Can someone check my calculations? They probably use a different imager for brighter objects, or a different optical configuration, or both. The target parameters specified for us may be determined by what the scope is configured for on that night. On Jan 8, 2013 9:35 PM, "Wiggins Patrick" <paw@wirelessbeehive.com> wrote:
On 08 Jan 2013, at 20:59, Joe Bauman wrote:
I suspect Jupiter would be a great target, if we shoot nice quick images. We probably could put together a video of its rotation. Sounds good to me, Dave!
Initially I did not think the 2 meter was supposed to be used on things as bright as Jupiter. However I just found this in their archives: http://lcogt.net/observations/ogg/2m0a/12201
So it has been done.
patrick _______________________________________________ Utah-Astronomy mailing list http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy
Send messages to the list to Utah-Astronomy@mailman.xmission.com
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Agreed. But the email announcing the session specified targets no brighter than 7. And I don't think they mean -7. :) I'm guessing this will get discussed at tomorrow's board meeting. patrick On Jan 8, 2013, at 22:26, Joe Bauman <josephmbauman@yahoo.com> wrote:
You can handle very bright objects with really short exposures, I think.
________________________________ From: Chuck Hards <chuck.hards@gmail.com> To: Utah Astronomy <utah-astronomy@mailman.xmission.com> Sent: Tuesday, January 8, 2013 10:12 PM Subject: Re: [Utah-astronomy] Can someone check my calculations?
They probably use a different imager for brighter objects, or a different optical configuration, or both. The target parameters specified for us may be determined by what the scope is configured for on that night. On Jan 8, 2013 9:35 PM, "Wiggins Patrick" <paw@wirelessbeehive.com> wrote:
On 08 Jan 2013, at 20:59, Joe Bauman wrote:
I suspect Jupiter would be a great target, if we shoot nice quick images. We probably could put together a video of its rotation. Sounds good to me, Dave!
Initially I did not think the 2 meter was supposed to be used on things as bright as Jupiter. However I just found this in their archives: http://lcogt.net/observations/ogg/2m0a/12201
So it has been done.
patrick _______________________________________________ Utah-Astronomy mailing list http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy
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Utah-Astronomy mailing list http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy
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Hi Dave, Thanks for double checking. I do wonder why they scheduled us to start so early. But maybe they think the 2100 start time was Hawaii time and not SLC time. I think Rodger Fry (this year's SLAS El Prez) is coordinating things so hopefully he'll post some thoughts. Rodger? Tchüss! patrick On 08 Jan 2013, at 19:12, Dave Bennett wrote:
Hey Patrick,
As Kurt has shown for Honolulu, sunset on Feb 8th isn't until 18:26 HAST. It's closer to 18:21 for Wailuku on Maui. According to timeanddate.com for Wailuku ( http://www.timeanddate.com/worldclock/astronomy.html?n=1084&month=2&year=201... ) the end of Nautical Twilight is at 19:10 HAST.
You actually may want to use your time imaging Jupiter (no joke) before astronomical twilight. Faulkes shows many examples of Jupiter pics.
As for the Hour Angle question, I get closer to RA 02h 49m and 05h 49m respectively but I think that is splitting hairs. (Or hares? Lepus is on the meridian at the end of your run!)
I'm not sure how far south in declination Faulkes can image but I've seen pics of the Great Barred Spiral in Fornax NGC 1365 and the Southern Ring Nebula in Vela NGC 3132 at -36 and -40 respectively.
Aloha and best of luck...I can't wait to see the results.
Dave Bennett Hilo, HI
All, The exact start time of our imaging session has not been determined but we will be at the computer ready to get things set up at 9:00 PM MST which is about 1/2 hour before sun set in Hawaii. We will start imaging after sun set in Hawaii which will be about 10:00 PM MST. I am going to request three hours imaging time on the telescope. More details to come. Thanks Rodger C. Fry -----Original Message----- From: utah-astronomy-bounces@mailman.xmission.com [mailto:utah-astronomy-bounces@mailman.xmission.com] On Behalf Of Wiggins Patrick Sent: Tuesday, January 08, 2013 9:23 PM To: Utah Astronomy Subject: Re: [Utah-astronomy] Can someone check my calculations? Hi Dave, Thanks for double checking. I do wonder why they scheduled us to start so early. But maybe they think the 2100 start time was Hawaii time and not SLC time. I think Rodger Fry (this year's SLAS El Prez) is coordinating things so hopefully he'll post some thoughts. Rodger? Tchüss! patrick On 08 Jan 2013, at 19:12, Dave Bennett wrote:
Hey Patrick,
As Kurt has shown for Honolulu, sunset on Feb 8th isn't until 18:26 HAST. It's closer to 18:21 for Wailuku on Maui. According to timeanddate.com for Wailuku ( http://www.timeanddate.com/worldclock/astronomy.html?n=1084&month=2&year=201 3&obj=sun&afl=-1&day=1 ) the end of Nautical Twilight is at 19:10 HAST.
You actually may want to use your time imaging Jupiter (no joke) before astronomical twilight. Faulkes shows many examples of Jupiter pics.
As for the Hour Angle question, I get closer to RA 02h 49m and 05h 49m respectively but I think that is splitting hairs. (Or hares? Lepus is on the meridian at the end of your run!)
I'm not sure how far south in declination Faulkes can image but I've seen pics of the Great Barred Spiral in Fornax NGC 1365 and the Southern Ring Nebula in Vela NGC 3132 at -36 and -40 respectively.
Aloha and best of luck...I can't wait to see the results.
Dave Bennett Hilo, HI
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participants (5)
-
Chuck Hards -
Dave Bennett -
Joe Bauman -
Rodger C. Fry -
Wiggins Patrick