Date   

Moon observing

George Reynolds
 

Many of you know I have been working on my Lunar II observing program.  Well, I finished it yesterday morning, about 6 a.m.!  I just need to submit my paperwork to our ALCor or the program coordinator.  

Yesterday's Moon was 27 days old, a thin waning crescent, rising at 3:46 am.  I got up about 0550, because I knew the Moon wouldn't be above the trees across the street until around 0600.  Sure enough, about 0620 it peeked between two tall pine trees, and I was able to make my final observation for the Lunar II award.  Dr. Ernest Cherrington, in his book Exploring the Moon Through Binoculars and Small Telescopes, on page 184 states, "The 27-day moon is an unusual sight -- a sight which most people probably never see during their entire lives."  And I can understand why:  (1) you have to get up at an ungodly hour to see it; (2) if you are up at that hour, you're probably getting ready for work or school, but you have to be looking UP toward the east, and you need a low enough horizon to see the Moon; and (3) it disappears as soon as the sun rises.  I went back out about an hour later, and the Moon was GONE!  It faded into the bright blue sky.

Well, I was challenged to try to see the 28-day-old Moon this morning, one day before New Moon.  If few have seen the 27-day Moon, even fewer have seen the 28-day Moon, right?  Moonrise was 0451 today, so I rolled out of bed about 0530.  I knew I would never see it above the trees before sunrise, so I went into the front yard with my Orion 8x42 binoculars and saw the tiny crescent rising above the neighbor's house across the street.  With my binos I was able to see the tiny bright "fingernail", surrounded on the rest of the moon's disc by Earthshine -- the whole Moon was in shadow, re-reflecting light bouncing off the surface of Earth.

Now that I have completed both Astronomical League's Lunar Program (20 years ago!) and now the Lunar II Program, I am tempted to follow Cherrington's day-by-day observations of the Moon in his excellent book.  I initially did the Lunar Program back in 2001 because my untrained eyes had trouble seeing the faint fuzzy Messier objects.  Now I want to keep looking at the Moon, because my cataract-clouded eyes can no longer see the dim objects again, but I can see the bright Moon.  I hope to get the cataracts removed soon, possibly in the next few months.

George


George Reynolds

"Solar System Ambassador" for South Hampton Roads, Virginia
Back Bay Amateur Astronomers (BBAA) 
http://www.backbayastro.org


 


Re: Patterson Observatory (Sierra Vista AZ)

George Reynolds
 

Outstanding!  I loved the tour.  You've got an excellent facility there.

George


George Reynolds

"Solar System Ambassador" for South Hampton Roads, Virginia
Back Bay Amateur Astronomers (BBAA) 
http://www.backbayastro.org


 


On Thursday, September 2, 2021, 03:27:44 PM EDT, Ted Forte <tedforte511@...> wrote:


I have probably mentioned the Patterson Observatory a few times on this forum.  I’ve been “Director” at this observatory since 2013. It’s sort of the club house for our astronomy club and a center of many of our outreach events. It’s pretty much my second home here.

 

The Patterson Observatory is listed as a NASA Space Place and has a 16 foot dome, housing a Ritchey-Chretien telescope of 20” aperture.

my.matterport.com

The 3D tour of the observatory was created by Ryan Straight, a professor at the University of Arizona, College of Applied Science and Technology cyber program. I hope you enjoy it.

 

Ted

BBAA Southwest


Re: Polar Alignment

George Reynolds
 

Dino,

I will send you the info on Amateur Astronomy Magazine when I get home from church. (I am replying to your message instead of singing during the song service.) 
:-)

George


On Fri, Sep 3, 2021 at 5:10, Jim Tallman
<jctallman@...> wrote:
Lol.. we didn't get this email either Dino 😎

Jim

Sent from my Verizon, Samsung Galaxy smartphone
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Important astronomical discovery

jimcoble2000
 

Aside from the miracle of three nights of excellent observing Kent and I made a major discovery last night of significant importance. I had a small UV flashlight with me to look at a moth we had seen the previous night. Not finding the moth, I looked around the astronomy shed out of curiosity and discovered:

The green striping and labels of Televue eyepieces are very fluorescent. They glow in the dark under UV light. Why this should be I can't imagine but there it is is. Little glowing nebulae on the shelf. This is a major observationEmoji. Try this observation yourself.


Re: The Cave from Last Night

Jim Tallman
 

Way from Norfolk :). The idea is to sell this one, use the money to buy some land, most likely NC or Suffolk, and rent for a bit to wait for the market to fall apart, then build a new place.

Just tired of inconsiderate people who you must live next to.

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Re: The Cave from Last Night

charles jagow
 

Where you going?

Sent from Chuck's iPhone

On Sep 4, 2021, at 12:36, Jim Tallman <jctallman@...> wrote:


Nice shot Ian. I guess I'll break my gear out tonight :). Might be the last imagery I do from this location :)

Jim

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Today's Sun

Jim Tallman
 

If you have hydrogen alpha solar scopes, have a look at the sun today very nice prominence is around and a fairly good size sunspot. Finally some activity

Jim

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Re: The Cave from Last Night

Jim Tallman
 

Nice shot Ian. I guess I'll break my gear out tonight :). Might be the last imagery I do from this location :)

Jim

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Re: Planetary Nebula Central Stars

jimcoble2000
 

That and the general hazy interiors of PNs require good definition to be able to separate the star from the background in so many of them. Maybe like the moons of Saturn. All you need to do is smear the light the tiniest bit and it is gone.

On Saturday, September 4, 2021, 12:10:31 PM EDT, Kent Blackwell <kent@...> wrote:


It's interesting that atmospheric seeing makes a huge difference is detecting the central stars in PnE. Probably because the magnification can be pushed to the absolute limit. 


The Cave from Last Night

Ian Stewart
 

OK the wonderful nights just keep on coming. Here's the Cave Nebula or SH2 155 from last night. Sorry about the fuzzy stars:-(
Cheers
Ian
SH2 155


Re: The Ghostly nebula

jimcoble2000
 

you don't stand a ghost of a chance

On Saturday, September 4, 2021, 01:39:35 PM EDT, Kent Blackwell <kent@...> wrote:


I'm marking that down to look at on October 31.


Re: The Ghostly nebula

Kent Blackwell
 

I'm marking that down to look at on October 31.


Re: Planetary Nebula Central Stars

Kent Blackwell
 

It's interesting that atmospheric seeing makes a huge difference is detecting the central stars in PnE. Probably because the magnification can be pushed to the absolute limit. 


Re: Planetary Nebula Central Stars

Ted Forte
 

Great observation Kent. 

 

Conventional wisdom has it that seeing is the limiting factor in detecting the central stars of certain PNe and I have no reason to suspect otherwise.  When the central star is similar in brightness to the central area of the PN, it takes steady seeing to detect it. I know from ample literature that is the case with the Ring Nebula.  There are far fewer scholarly discussions on the visibility of the central stars in the Saturn Nebula and NGC 6891 but I strongly suspect that the situation is similar.  Surface brightness values can be misleading as they are an average over the entire body and they do not account for variations across the body.  I believe the brightness of M57’s central star is only about .1 or .2 magnitudes brighter than the surrounding nebulosity.

 

Anyway, I can also attest to the difficulty in detecting the central stars of all three PNe that Kent mentions here. My logs contain 17 descriptions of NGC 6891 and 6 of them report detecting the central star. I’ve described NGC 7009 in my logs 62 times and mention the central star being  visible in only 5 of them.  Suffice it to say, that I’ve seen the central star in M57 a small number of times in relation to the 382 descriptions I’ve recorded – I’m just not going to read through them all to count!

 

It is unfortunate however, that like many observers, I don’t always mention negative attempts to see the CSPN, so I can only guess at whether I actually considered the visibility of the central star for any particular instance where it is not specified. That is sometimes I’ve specifically said that the central star was not visible and other times, its just not mentioned in my notes.

 

Ted

 

From: BackBayAstro@groups.io <BackBayAstro@groups.io> On Behalf Of Kent Blackwell
Sent: Saturday, September 4, 2021 5:09 AM
To: BackBayAstro@groups.io
Subject: [BackBayAstro] Planetary Nebula Central Stars

 

Last night I tried my hand at seeing a central stars in a few planetary nebulae. The most challenging is the central star in M 57, The Ring Nebula. I could count the times in one hand I've seen it in 50 years. Using my 25" I was not able to see it with a 16mm Nagler (200x), nor could I see it bumping the power up to 635x with a Pentax 5mm. Finally using a 7mm Pentax at 435x I saw it for one fleeting second, then again; quickly disappearing as fast as it appeared.

Almost as challenging is the central star in NGC 7009, The Saturn Nebula. This time it popped into view using a 3.5mm Pentax, at a whopping 907x.

Lastly was the very blue central star in NGC 6891 in Sagittarius. It's small so I had to once again use the 3.5mm Pentax at 907x. It reminds me of the above Saturn Nebula, being slightly flattened.


Planetary Nebula Central Stars

Kent Blackwell
 

Last night I tried my hand at seeing a central stars in a few planetary nebulae. The most challenging is the central star in M 57, The Ring Nebula. I could count the times in one hand I've seen it in 50 years. Using my 25" I was not able to see it with a 16mm Nagler (200x), nor could I see it bumping the power up to 635x with a Pentax 5mm. Finally using a 7mm Pentax at 435x I saw it for one fleeting second, then again; quickly disappearing as fast as it appeared.
Almost as challenging is the central star in NGC 7009, The Saturn Nebula. This time it popped into view using a 3.5mm Pentax, at a whopping 907x.
Lastly was the very blue central star in NGC 6891 in Sagittarius. It's small so I had to once again use the 3.5mm Pentax at 907x. It reminds me of the above Saturn Nebula, being slightly flattened.


Re: The Ghostly nebula

Roy Diffrient
 

Spooktacular!

Roy


On Sep 3, 2021, at 7:28 PM, Ian Stewart <swampcolliecoffee@...> wrote:

A quick closeup shot of IC63 from last night. Definitely has that ghostly feel.
Cheers
Ian
IC63


Re: The Ghostly nebula

jimcoble2000
 

very nice. Iike that one

On Friday, September 3, 2021, 07:28:08 PM EDT, Ian Stewart <swampcolliecoffee@...> wrote:


A quick closeup shot of IC63 from last night. Definitely has that ghostly feel.
Cheers
Ian
IC63


The Ghostly nebula

Ian Stewart
 

A quick closeup shot of IC63 from last night. Definitely has that ghostly feel.
Cheers
Ian
IC63


Re: Cornwatch 9/3/21

Gabriel Dandrade
 

The weather looks good. I’ll be there. If anyone else wants to come they’re welcome


Re: BBAA September 2 Meeting ZOOM Recording

William Rust
 

Here, Here!
Jeff, do y still want to do a presentation next month?


From: BackBayAstro@groups.io <BackBayAstro@groups.io> on behalf of Jeff Goldstein <jeffgold1@...>
Sent: Friday, September 3, 2021 4:52 PM
To: BackBayAstro@groups.io <BackBayAstro@groups.io>; VPAS@groups.io <VPAS@groups.io>
Subject: [BackBayAstro] BBAA September 2 Meeting ZOOM Recording
 

Topic: BBAA

Start Time : Sep 2, 2021 07:13 PM

Excellent Presentation by George Reynolds’ DVD Astronomy Facts from 2006

 

 

Meeting Recording:

https://vccs.zoom.us/rec/share/m0hhP0gwEgHvOj9RU397ZolHLc8JUWRaBgA7XTp75ezFBkG-JX7ScsOSnqEtKw5L.ea6vIDkr6kQDJpV2

 

Access Passcode: BBAA_9-02

 

Enjoy!

 

Jeff G.

 

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