Todd's Amateur Astronomical Observations

Collinder 399

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Coathanger asterism (Collinder 399)

Blog post for this observation

colinder399.jpg


Name

Todd D. Vance

Bowie, MD

Seeing (1-10)

5


Site

Bowie, MD: N38º54'51''

W76º44'5''

Date / Time

6/10/06

23:24—23:33EDT

Transparency(1-5)

3.5


Object Name

Collinder 399

Coathanger asterism

Instrument

Celestron C6-R 150mm f/8 refractor

Power

30X (40mm plössl)

1.25 º FOV

Constellation

Vulpecula


Location: ____h ____m ____s ____º ____' ____'' J2000 (Starry Night)



 

Most of the coathanger fit in the field of view, but I chopped off one star. The central star was brilliant white. Two stars of the curved hook were orange, and one was bluish-green, and one dimmer one was bluish white. The star in the line nearest the central star was bluish white, as was the one northeast of it. The remaining stars were white. Some glow (from the moon) was on the southeast portion of the field of view. I used this asterism to measure the field of view of my 40mm eyepiece.

This is easily found in the finder by pointing the telescope 1/3 of the way from Altair to Vega.

Once thought to be an open cluster, the coathanger is merely a chance alignment of unrelated stars.

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