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Comet 252P/LINEAR
March 31, 2016

On March 31, 2016, comet 252P/LINEAR was spotted with 16x70 binoculars at 3:37 am EDT from Carranza Field in Wharton State Forest, NJ. The third-quarter moon (53% illuminated) was 15 away, below-left of the comet and out of the frame in this view. This image of 252P was captured at 3:51 am EDT with a Canon EOS 6D digital SLR camera (on a fixed tripod) and a Canon EF 100 mm f/2.8L macro lens, then cropped to about 80% of the original size, so the field is roughly 16 wide x 11 high. It was exposed 2.5 seconds at f/3.2, ISO 6400, 3800K color balance. 252P was 10 northeast of Saturn (the bright object near the right edge, mouseover for labels). It was faintly visible in the 16x70s, but it could also be seen (barely) with 10x50 binoculars. It was definitely dimmer than nearby M4 in Scorpius, about 21 away (and also farther from the moon). Despite the moon brightening the sky, vague Milky Way was visible inside the Summer Triangle, high in the east.

 

The image above is a 40% crop of the same original frame as the wider-field image (mouseover for labels).

 

Here's a separate image with the viewpoint moved to right of 252P so that it shows Saturn, Mars and Antares (mouseover for labels). Mars and Antares are about 7 apart, and both are about 9 from Saturn. Taken at 3:53 am EDT on March 31 with the Canon EOS 6D digital SLR camera (on a fixed tripod) and a Canon EF 100 mm f/2.8L macro lens, uncropped, so the field is roughly 20 wide x 14 high. It was exposed 2.5 seconds at f/3.2, ISO 6400, 3800K color balance.

 

 

Comet 252P/LINEAR - Not
March 30, 2016

On March 30, 2016, comet 252P/LINEAR was at 27 altitude, and just 2 from the 63% illuminated gibbous moon, as observed from Swede Run in Moorestown, NJ. Both objects were in the constellation Ophiuchus the Serpent Bearer. The moon is just outside the bottom edge, although considerable flare from it still intrudes into the frame. Ignoring the moon flare, no sign of the comet is visible in the image, even though 9.x magnitude stars are present near the position indicated by SkyTools (mouseover for labels) and a few recent estimates put 252P around magnitude 6.5. The comet was also unseen with 16x70 binoculars and a 12.5-inch Newtonian telescope at 66x and 113x. Normally, I wouldn't think of looking for a comet this close to such a bright moon, but this was the first clear morning since rapidly north-moving 252P entered the sky at our 40N latitude on March 24, 2016. I had also looked on the morning of March 26 with 16x70 binoculars when the moon was 49 away, but was foiled by thin to thick clouds. The picture was taken with a Canon EOS 6D digital SLR camera and a Canon EF 70-200 mm f/2.8L zoom lens (on a fixed tripod) set to 200 mm focal length, then cropped to about 29% of the original size. It's a single exposure of 2 seconds at f/4, ISO 3200, using 3800K color balance. The frame is about 5.8 wide x 3.8 high.

 

 

Young Crescent Moon
March 9, 2016

On March 9, 2016, the moon was 21 hr 07 min old at sunset, 6:01 pm EST at this site a couple of miles from 40N-75W (Swede Run in Moorestown, NJ). The slender crescent was initially spotted at 6:11 pm with 10x50 binoculars when it was at 8.0 altitude, then seen with unaided eyes at 6:26 pm. This image was captured at 6:27 pm when the moon was 21 hours 33 minutes old and 5.2 altitude using a Canon EOS 6D digital SLR camera (on a fixed tripod) and a Sigma 70-300 mm f/4-5.6 zoom lens set to 300 mm focal length. It was exposed 1/80 second at f/8, ISO 3200.

The old moon preceding this new moon was last spotted with 7x42 binoculars at 6:21 am EST on March 7th. At the time, it was 27.86 days old and 38 hr 33 min before new. From that time until the young moon was sighted at 6:11 pm on March 9th, 59 hr 50 minutes had elapsed.

 

Here's another view at 6:32 pm EST when the moon was 21 hours 38 minutes old and 4.3 altitude. Same camera, lens and focal length as before, but cropped to half the linear dimensions of the original frame (effectively 600 mm focal length with the "full-frame" sensor of the 6D). Exposed 1/30 second at f/6.3, ISO 3200.

 

 

Omega Centauri - Not
February 21, 2016

Here's another attempt to spot the great globular cluster, Omega Centauri (NGC 5139). I tried again on February 21, 2016, from Moorestown, NJ, near the intersection of Borton Landing and Hartford Roads (about a mile from the WAS meeting site). I searched between 3:00 and 3:30 am EST with 16x70 binoculars, but alas, Omega was not seen (it transited the meridian at 3:25 am). Complicating the search, there was a 98% illuminated moon above/behind my right shoulder (it will be full on February 22nd at 1:20 pm EST).

I also tried to capture it photographically, but again, no success. This representative image was taken at 3:15 am using a Canon 6D digital SLR camera (on a fixed tripod) and a Canon 100 mm f/2.8L macro lens (then cropped to about 10 square). It was exposed 4 seconds at f/2.8, ISO 800 (which is about 2.5 stops less exposure than the following picture from East Point, due to a brighter sky from moonlight and suburban light pollution). The camera's internal GPS indicated a location of 3959'17"N, 7454'31"W. My reference stars for finding Omega, the Nu & Mu Cen pair leading down to the Upsilon 1 & 2 Cen pair, then down to Zeta Cen, are all apparent in this image (as they were in the 16x70s too). Zeta is at 2 altitude, while Omega would have been at 2 altitude, 5 to the right of Zeta. Despite trying extreme adjustments of brightness and contrast, no hint of Omega was revealed in any of the pictures from this set. The peculiar galaxy, Centaurus A (4 above Omega), was also absent in the images as well as visually with the binoculars. Mouseover for labels; the nominal positions where Centaurus A and Omega Centauri would have been are circled.

 

 

Omega Centauri at East Point
February 18, 2016

The great globular cluster, Omega Centauri (NGC 5139), was spotted with 16x70 binoculars on February 18, 2016, from East Point, NJ, at 3:40 am EST, several minutes after it transited the meridian at 3:37 am. However, murky conditions above the horizon precluded a good view, and except for a couple of minutes around 3:40 am, Omega was difficult to see at all. East Point is on the northern shore of the Delaware Bay at Maurice River Cove, and the view from East Point pictured above looks due south towards the Atlantic Ocean through the dark gap between Cape May, NJ, and Lewes, DE. This image is a single frame captured at 4:01 am EST with a Canon EOS 6D digital SLR camera (on a fixed tripod) and a Canon 100 mm f/2.8L macro lens (providing a field about 20 wide x 14 high). It was exposed 4 seconds at f/3.2, ISO 6400. Omega Centauri was at 321' apparent altitude, and the peculiar galaxy Centaurus A (NGC 5128) is vaguely visible 4 above Omega. It too is visible with binoculars from East Point. Mouseover for labels. The stars Nu and Mu Centauri are a good starting point for finding Omega. They're relatively easy to spot with unaided eyes, and with binoculars from there, drop down to Upsilon 1 & 2 Cen, then drop again to Zeta Cen. Move 5 to the right, and there's Omega.

 

 

Coyle Field
February 5, 2016

On February 5, 2016, I went to Coyle Field in Woodland Township, NJ. Here's the view at 10:13 pm EST looking south towards Atlantic City (30 miles away). Most of the accumulation from a heavy snow on January 23rd had dissipated, but there was a light snow overnight on February 4/5 that whitened the ground again. Luckily, there was a bare space on the runway along the berm to set up my scope. Sirius and Canis Major are in the sky above the car, Orion is above-right of that, while Procyon and Canis Minor are near the upper-left corner. Some winter Milky Way is even visible diagonally left  of Sirius. Streaks from a few aircraft are also present. Taken with a Canon EOS 6D digital SLR camera on a fixed tripod and a Sigma 20 mm f/1.4 DG HSM lens. It's a single frame exposed 8 seconds at f/2, ISO 3200, custom white balance. Mouseover for labels.

 

 

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West Jersey Astronomical Society

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South Jersey Astronomy Club

Coyle Field Astronomers

 

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Last Update: Sunday, April 17, 2016 at 04:28 AM Eastern Time