Thursday, December 24, 2020

imaged the tree (Stillwater Lake)

Back on 3 Dec, I queued up a MRO job, aiming at SAO 114273 which was in the middle of the target. Funny timing...

NGC 2266 and friends in Monoceros

Luminance filter, 15 second subexposures, 12 stacked shots. FITS Liberator, GIMP. Note! North is down; left is east. I.e. it's vertically flipped. Also, full frame requested.

Mini-Robotic Observatory captured a nice wide field.

Lots going on here, of course. 

NGC 2264, the Cone Nebula, the "Christmas Tree" cluster, the Fox Fur nebula, double stars, etc.

The Cone Nebula is also known as NGC 2264, Sharpless 2-273, LBN 911, and Bernes 97. The cone proper is faintly visible at the peak of the tree. It contains the catalogued dark nebula globules NGC 2264-1 and W 75.

The open cluster is aka Collinder 112, Melotte 49, and OCL 495.

15 Monocerotis, the multi-star system is here, starting at the "trunk" of the tree and the brightest star in the entire field. Back on 18 Mar '17, I imaged the double star complex with the BGO rig and Apogee CCD.

Double star STF 3118 is the equilateral triangle to the east of 15 Mon.

Struve 954 is the double star at the top of the tree. The brightest member is the star at the apex of the near the tree. B is barely visible, at the 11 o'clock position, extremely close to A, in the glare of A. The C element is beyond, further to the south-east. Over to the south-west, two to three times the separation is bright D. South of D is E.

The Fox Fur nebula is up and right of 15 Mon.

Σ951 aka V684 Mon is in the middle of the Fox Fur. B is plainly visible at the 4 o'clock position or north-west. C is remarkably tight to B, south-west of B. D is easy, south-east of A, well away. E is easily spotted while dim, west-north-west of A, the same distance as D.

South-east of the cone is double star J 39. It is an unequal pair with faint B almost due north, below.

West of 15 Mon is another globule, NGC 2264-3.

A lovely dense part of the Milky Way. You can see this is a dusty region, lots of stuff is being blocked...

Weird shadow in the frame. Big dust mote, in the 'scope, not in space.

All of the stars seem to have a glow. Bad transparency? Dew?

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