Gyulbudaghian’s Nebula

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  • #614681
    David Boyd
    Participant

    There is a suggestion in this stacked image of 40 x 60 sec exposures recorded on 15th December with a 0.35 m SCT and Rc filter, that Gyulbudaghian’s Nebula might be starting to reappear.

    David

    • This topic was modified 1 month, 2 weeks ago by David Boyd. Reason: Original image reversed horizontally
    #614695
    Grant Privett
    Participant

    Hi David,

    I think that V shape and the right hand wing (on your image) feature have been faintly visible on some unfiltered images since the summer.
    Such as here:
    https://britastro.org/observations/observation.php?id=20221129_230438_ac6a218c4ac94ed0
    and
    https://britastro.org/observations/observation.php?id=20221129_230930_656c96e63f3df518

    Was it absent in your similarly exposed Rc filtered images from earlier in the year? The nebula is heavily reddened, so you might well see changes before those of us working unfiltered noticed them.

    Do you still measure the nebulosity brightness at all? What does that curve say?

    Would be nice for this or McNeil’s to reappear at last. Looked at Thomme’s last night and can’t see much change since I started looking at it and McNeil’s is absent with V1647 Orionis in the 19.5-20.5 mag range when skies are clear enough to detect it.

    Happy Solstice!

    Grant

    #614697
    Richard Sargent
    Participant

    Hi David,
    I attach my image of Mr G taken last night but it’s only a 20 minute total exposure so doesn’t show things as clearly as yours. The fan shape is there plus a hint of the extension. I agree with Grant that the fan shape has been there a while. Indeed Mike H commented on it when he posted his image on 23rd November. However I need to check more of my images but I don’t think the fan shape was there before 9th November. So maybe the nebula is trying to return! I’m sure we will keep checking!

    Richard

    #614738
    David Boyd
    Participant

    Hi Grant,

    My attempts to image the nebula earlier in the autumn have been affected by either thin cloud, haze or moonlight making the nebula barely detectable. This was a really clear night here and the extended E wing of the nebula was more prominent than I had seen it for most of 2022. Trying to measure the flux from the nebula is still problematical. I can only detect a very slight increase in both PV Cep and the nebula.

    David

    #614750
    Grant Privett
    Participant

    Thanks for the headsup. Your observation really does suggest we all need to keep a close eye on it in the months ahead.

    #614778
    Mike Harlow
    Participant

    I’ve summarised my observations for 2022 on my members page which might help to put your observations above in context:

    https://britastro.org/observations/observation.php?id=20221219_161104_da146741d971c02c

    Mike

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