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Messages - joelin02

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TAC Imaging / Re: M101 Pinwheel Galaxy
« on: July 04, 2017, 07:57:21 AM »

Here's mine from GSSP. It was L only (the RGB were out of focus) on an Edge 8" and Tak EM-200.

Integration time wasn't too long. Maybe 20 x 3 min subs.

what is the weather like there in october?? Looking at the Wiki page for sydney I see 11.1 rainy days in October.

Given how this rainy season has been here in the bay area...I'd hate if most of my days there were underneath clouds

Observing Intents / Re: Dinosaur Point Saturday night
« on: January 25, 2017, 09:02:09 PM »
I'm pretty interested. Roughly what time will people be leaving? How is between 11 and midnight?

Observing Intents / Anyone going observing this weekend?
« on: December 17, 2016, 10:13:06 AM »
Sure the moon rises early, but its the best night we've had in a while....and there are still a few good dark hours in the early evening.

Im looking at the two events SJAA is hosting in south san jose...

Observing Intents / Re: OI - Dinosaur Point, Thursday, December 1st
« on: November 30, 2016, 12:19:44 PM »
The clear sky chart: and other ones in the bay area show winds of 12 to 16mph Thursday night. Is that too windy to observe? How about to image?

Observing Intents / Re: Dinosaur Point Thursday night, 1 December
« on: November 23, 2016, 03:16:33 PM »
If theres an opportunity to get in after 4:30pm, I would be interested.

Getting there at 4:30pm on a weeknight may be hard given a day job and afternoon traffic...

TAC Visual / Re: Fresh gate mojo at Dinosaur Point
« on: November 21, 2016, 03:12:09 PM »
The moon rises 230am on Wednesday night (technically Thursday morning) and later each night after that. Can we get potentially access Wednesday to Friday since those coincide with the Thanksgiving holiday?

Also, a quick glance at the weekly forecast shows the clearest skies Wednesday night...

TAC Visual / Re: Fresh gate mojo at Dinosaur Point
« on: November 21, 2016, 08:57:43 AM »
It looks like there will be some clear nights the next few days (on and off). Any thoughts on what we can expect in terms of going to dino? Will it be announced early so we can potentially plan for it?

TAC Imaging / More photos/videos from Calstar
« on: October 11, 2016, 09:52:53 AM »
There are some wide angle shots of the milky way/Zodiacal light and campground at Calstar (Nikon D600, 16mm f/3.2). The deep sky object are with a 180mm f/2.8 lens on an iOptron skytracker has the zodiacal light rising in the east next to the milky way (Nikon D600, 16mm f/3.2) was my setup area shot with a GoPro Hero 4 Silver (low quality...if anyone knows how to do milky way timelapses better with a GoPro, let me know) this is a panning timelapse of the camp area

TAC Imaging / Big meteor at Calstar on the last night
« on: October 08, 2016, 03:08:14 PM »
Does anyone remember it? It came down around 840pm in the south and everyone gasped.

I caught it while doing a timelapse.

Annual Star Parties / A thought about Calstar and GSSP
« on: October 03, 2016, 03:24:55 PM »
First, I wanted to thank all the organizers around Calstar for throwing up a fabulous event last weekend. I was quite amazed at the facilities at Whipser Canyon for a nominal registration fee. It definitely made everything more enjoyable.

I was mentally comparing GSSP and Calstar and the one thing that stood out for me was the drastic difference in the duration of astronomical darkness at these locations.

Using the June 21-25 dates for GSSP (2017), September 29 - October 2 dates for Calstar (2016) and the approximate locations for GSSP (Adin, CA) and Whipser Canyon campground, I came up with the following numbers for astronomical darkness:

GSSP in June:
10:49 PM - 3:23 AM, 4 hours 34 minutes of darkness
1 hour 11 minutes before midnight

Calstar in September:
8:13 PM - 5:33 AM, 9 hours 20 minutes of darkness
3 hours 47 minutes before midnight

Now the driving times to each location (without traffic) from San Jose:
GSSP: 5 hours 13 minutes each way
Calstar: 2 hours 13 minutes each way

Now GSSP runs 4 nights, but even with that extra night here is the amount of darkness per minute of driving time:
1.75 dark min / drive min at GSSP

For Calstar the ratio is better even though it runs 3 nights:
6.32 dark min / drive min at Calstar

So Calstar gets about 3.6x as many darkness minutes for your driving time. The ratio is a lot higher if you have a 1am or midnight bedtime instead of waiting for astronomical darkness to end. For a 1am bedtime, the ratio rises to 3.87X

So what are my thoughts from all this?
Well, if we reversed when Calstar and GSSP happened so Calstar was in June and GSSP in September, a couple things would happen:

1) You would roughly double your amount of darkness at GSSP in September ( 8:20 PM - 5:28 AM ) over June. This would double the darkness for your drive ratio for GSSP
2) Your total darkness from the June at Calstar + September at GSSP combo would also increase over the current setup. This is because you gain darkness in the Summer by heading south and the two locations are separated by about 6 degrees of latitude. GSSP in June has about 4 hrs 34 minutes of darkness while Calstar in June has 5 hrs 46 minutes, a whole hour longer.

Anyhow, these are just my 2 cents. I know the weather in Adin, CA is a bit more unstable in late September, but what do people think about the summer solstice timing of GSSP?

Annual Star Parties / Re: green laser pointers
« on: September 21, 2016, 06:25:56 AM »
Thanks for the replies. Did you ever find it difficult to either:

1) look behind a red dot finder? Especially when it was pointed towards the zenith?
2) figure out what you were shooting based on the resulting shot? This more so applies when you're using a telephoto and you might be off by as much as 10 degrees from your target...

Annual Star Parties / Re: green laser pointers
« on: September 19, 2016, 06:08:48 PM »
I've got an iOptron Skytracker where I'll put a Nikon D600 and 180mm f/2.8ED lens.

Polar aligning is easy, aiming it correctly is quite difficult...

Annual Star Parties / green laser pointers
« on: September 18, 2016, 10:17:04 PM »
So since Calstar is a big group event, green laser pointers are not permitted correct?

If I want to do some imaging with a dslr w/long lens and I need to figure out what I'm aiming at ... I normally use a green laser pointer. Are there any other less intrusive options?

Observing Intents / Re: Montebello
« on: August 31, 2016, 09:32:36 PM »
I plan to be at Montebello tomorrow night. Hopefully someone can join. The nights there have been dark as the fog covers the valley.

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