pjsmith_6198

I viewed Comet 12P Pons-Brooks this evening with my 12 inch dob. It is currently in outburst. TheSkyLive.com had the magnitude at 9.0. That seems about right since it was pretty easy to see at a magnification of 75x. Here is a link to positions and magnitude graphs. The graphs show a large jump in brightness from the original outburst in July. Recently it had another outburst which is why it is currently so bright. This is a good time to catch this comet because it's easy to find since it's so close to Vega. I attached my finder chart below. It will be moving through Lyra into Cygnus between now and January. It looks like the coordinates CentaurZ are correct but the magnitudes are off because they aren't reflecting the outbursts. When it is at it's brightest it will be a morning comet. Phil

I went out this morning to look with my 12 inch dob , but I didn't have much luck. I had a chart from SkyTools 4 and was sure I was in the right location, but it was hazy and very humid. There was a couple of times I thought I might have seen it, but I think it was my EP beginning to fog up. I looked until the twilight was obviously too bright to see the comet. However I did get a good look at Jupiter. I case of bad transparency and good seeing. I'll try again the next clear morning. Phil

Here is some chart info and a magnitudes graph: http://www.aerith.net/comet/catalog/2023P1/2023P1.html It's currently in Gemini and it will go through Cancer, Leo, and into Virgo towards the end of September. According to SkyTools 4 , currently it gets about 20 degrees above the horizon before the morning twilight gets too light. As the comet gets brighter , it will get lower and lower on the horizon and more difficult to see. Don't wait until the comet gets bright to go and look for it. It won't be visible for us to see even if it's mag 2. Try and take a look as soon as the weather cooperates. I may get a clear morning Wednesday. I'll give it a try then. Phil

Comet 12P Pons-Brooks had a 5 magnitude outburst going from mag 16.5 to mag 11.4 on July 20. Sky and Telescope has a good article about this https://skyandtelescope.org/astronomy-news/see-comet-12p-pons-brooks-in-outburst/ . Currently https://theskylive.com/comets lists the magnitude as 11.7, and coma diameter as 1.1' . I was able to view it on 7/22 using my 12 inch dob. The sky and telescope article described the comet as looking almost stellar with low magnification. It was also estimated at mag 11.7 when I observed it but theSkyLive estimated the coma at .8' and it looked like a small but fairly bright planetary nebula. It was much easier to see than comet 2023 E1 ATLAS. E1 ATLAS coma and much more diffuse. It should remain viewable for a short while before the outburst fades. However, it may be as bright as 4.5 in March or April 2024. Here is more information about its position and brightness here: http://www.aerith.net/comet/catalog/0012P/2024.html Phil

C/2023 E1 is very diffuse and more challenging than its magnitude suggests. However, it does respond well to a comet filter. It's one of the few comets I've seen where the comet filter made a difference between seeing and not seeing the comet. If you don't have a comet filter, try using a OIII or UHC filter. The comet filter passes one of the OIII bands plus C2. so either will jhelp see this comet. Phil

Good decision. You'll get a better view plus if the temperatures aren't so bad you can enjoy it longer. Phil

You will still be able to see it. C/2022 E3 has a bright central concentration surrounded by a large coma. I've seen it a few times. The last time on 1/30/2023. The Moon was bright, but the comet was still good. The Moon will diminish the the coma and you won't see any tail, but the central concentration will still be easily visible. It would be like looking at the Orion nebula with a full Moon. It's not as good as no Moon, but you can still visible. A bigger problem than the Moon might be the cold. It's supposed to be very cold where you are. E3 is still going to be bright for awhile . If you can reschedule the Bortle 4 site trip until the Moon is out of the way, E3 would be more impressive than under a full Moon. But you can still see it with the Moon. Phil

My best views of Venus have been through high clouds. Phil

Plus asteroids Juno and Vesta in Aquarius between Neptune and Saturn and Comet C/2017 K2 PANSTARRS in Ophiuchus near IC 4665 and Cebalrai . It doesn't get much better than this. Phil

Splitting Antares is very difficult and I've never had any luck doing it. The problem being the separation between primary and secondary is only 2-3 arc seconds and Antares A is much brighter than Antares B (mag 1.2 to mag 5.4). Also being so low above the horizon doesn't help either. So I thought I would try different filters to filter out most of the brightness of the primary to make the secondary easier to see. Antares B is class B2 or B3 which is blue white. So I would use Astronomik OIII, H-Beta and UHC filters to see if any of helped. I was using my 12 inch dob with 10mm/7mm/5mm XW's and 9mm/7mm Fuji ortho's and 10mm/6mm BCOs. I tested different combinations of EPs and filter over 3 sessions. The seeing varied average to better than average but not great. Transparency was average to below average each night. Bad transparency might actually help it helps reduce the glare. My best view of Venus was looking through clouds. Each night I checked and tweaked collimation if needed. Using no filters I failed to split Antares with any of the EP's I was using. Using a 2x barlow didn't help. Seeing was not good enough to go beyond 300x on any night. The performance of the OIII and H-Beta filters were similar. Both tightened up the focus considerably compared to using no filters. Antares was still difficult to split but on the nights of better seeing I was able to tell there were 2 stars there and splitting in moments of better seeing. It was slightly easier to split with the ortho's than the XW's. However I would get more eye strain with the ortho's. The XW's were more comfortable to use. I wasn't expecting much from the UHC filter because along with passing the OIII and H-Beta bands, it passes most of the H-alpha. So if you look at a bright star you see both greenish blue and magenta color. I thought that to much red would pass and Antares A would still over power Antares B. What happened was the image focused to a small bluish point touching a larger magenta point. The blue point was approximately at 8 O'clock position compared to the magenta point. I viewed Arcturus using the same EP/UHC filter. I saw both blue and red but they didn't resolve into blue and magenta points. Just one containing both colors. I viewed the Double-Double Epsilon 1 and 2 in Lyra because they have about the same separation. These resolved with both colors but mostly blue with the same separation and orientation as with no filter. I was harder to split them using the UHC filter than no filter because they were fainter. I split Cor Carli with the UHC but the separation was wide enough that they looked like normal stars with the UHC. No blue and magenta. My conclusion is Antares is easier to split using a OIII or H-Beta filter than using no filter. Antares is easiest to split with a UHC filter which passes the H-alpha band because the stars resolve into a magenta primary and blue secondary. This probably only works for blue and red doubles. Has anybody tried this before? I thought using the OIII or H-beta would help somewhat but I didn't expect the UHC would be so easy. Thanks, Phil

I saw K2 for the first time last night. You're right it does look like an elliptical galaxy. Also nearby are planetary nebulas NGC 6572 and PK 38+12.1 plus a couple of open clusters in addition to NGC 6633. Unfortunately by the time I was observing K2, my EP's and finder were all having fogging issues so I had to stop for the evening. Tomorrow may be clear and I'll be able to see the comet again plus all the other nearby objects. This is going to be good comet to watch all summer. It's going to be fairly bright, in a good viewing position in a part of the sky filled with other targets. Phil

I have the Lumicon comet filter. Most of the time it doesn't help a great deal. But a few times, it was the only way I saw the comet. So I would recommend getting the Lumicon filter. Comets usually shine from a combination of reflected light off dust and ionization. The filter darkens the field and passes the ionization and not the reflected light. It's like using filter's with nebula . A OIII filter will kill a reflection nebula but can work with emission nebula. It doesn't do magic (like OIII with the Veil Nebula) but it's a good tool to have. Phil

Thanks Neil. Comets are my favorite targets also. Another comet you can try is 104P Kowal 2. It's in good position in Orion but it's very challenging. I tried for that a couple of weeks ago with my 12 inch dob but didn't see it for certain. I thought I might have seen something there using my comet filter with averted vision. But I couldn't repeat that. I tried low magnification, high magnification and with/without the comet filter. Looking back, I think I would have had better luck if I would have tried to observe it earlier in the evening when it was higher in the sky. If you look for this, try it as high in the sky as you can. Preferably from your dark site. It's diffuse and won't tolerate any Moon interference. Here are some web sites I use to find visible targets. You are probably familiar with these. I also use SkyTools 4 to find and make eyepiece charts http://astro.vanbuitenen.nl/comets https://www.cometchasing.skyhound.com/ http://www.aerith.net/comet/future-n.html https://theskylive.com/comets Phil

I've observed it a couple of times and it was pretty easy to see. It looked a lot like C/2019 L3 ATLAS, about the same magnitude and condensed central concentration. It's currently in Aires not too far from the Pleiades and moving towards Perseus. It's starting to fade, but it's still mag 9.6 according to https://theskylive.com/comets Phil

I would recommend the PSA. It's small , inexpensive and convenient. The stars go down to mag 7 and pretty much matches what I see through my finder scope. I use a piece of clear plastic with a circle the size of my finder field of view. Makes star hopping easy. Phil