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Thread: In search of another resource

  1. #1
    Hillrat's Avatar
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    Default In search of another resource



    I am looking for another program that will show low (dim) magnitude things. While experimenting with guiding and longer duration exposures I found a galaxy that none of my current programs shows. I captured it clearly yet astrometry.net wouldn't even identify it.

    What are the alternatives to CDC and Stellarium to identify these dim Deep Space Objects?

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    Default Re: In search of another resource

    Sky Safari Pro offers an unlimited magnitude setting. If you can give me the coordinates of the galaxy you captured, I will check the program for you and see if it is displayed.
    Mary


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    Default Re: In search of another resource

    There are usually extra catalogs in CdC and Stellarium that are not active if your magnitude limits are set too high.
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    Default Re: In search of another resource

    I'd use Simbad: SIMBAD: Query by coordinates

    The linked page lets you enter the coordinates (you should be able to roughly figure those out using the programs you already use) with the format RA, a comma, and DEC.
    For example, "20 18 12, -13 17 20" to enter RA of 20hr 18min 12 sec and DEC of -13deg 17min 20sec (you can specify things more or less accurately, e.g. "20 18, -13").
    Then enter 'define a radius', such as "15" arcmin (15 is probably a good value. If you go too small or large you can face problems.).
    Then hit 'submit query'.

    It will then bring up a list of objects in that radius. But you probably want to hit the button that says 'Plot', which will bring up an image of that area. Drag the corner of that small image to make it a larger, easier-to-use image. Then you can compare this image with your own image, locate the object in the image and click on it, which will highlight the corresponding object in the list; click on the object in the list and it will tell you more info about it. When looking at the image, you can zoom in and out (mouse wheel) and pan around.

    Good luck! (And feel free to ask if you have problems or questions.)

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    Default Re: In search of another resource

    Thanks all, just got home from the Granddaughter's skating carnival. Will bring up the image and see if I can get some co-ordinates. Will also hunt through Stellarium stuff to see if I've missed something. The DSO in question didn't start to show up until I did my very first 5 minute exposure. Guiding went well enough to extend the time out to 10 minutes still having nice round stars.

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    Default Re: In search of another resource

    LOL I now appreciate the headaches I suffered getting plate solving to work. The dim galaxy is at RA 13 13 55.6 DEC 42 12 45.1

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    Default Re: In search of another resource

    Give SIMBAD a try now that you have the coordinates.
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    Default Re: In search of another resource


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    Default Re: In search of another resource

    You could also enter the coordinates directly on Aladin Lite in the Target box. (Dec needs a + or -)

    https://aladin.u-strasbg.fr/AladinLite/
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    Default Re: In search of another resource

    Here is what NED came up with: (or you can just go to the page Here)
    Object Name, RA/DEC type Mag/filter separation


    SDSS J131356.27+421247.3
    198.48448
    42.213140
    G



    20.6g
    0.13000000
    0
    0
    25
    2
    0
    4





    2
    SDSS J131354.70+421247.9
    198.47795
    42.213310
    G



    20.6g
    0.17200000
    0
    0
    25
    2
    0
    4





    3
    SDSS J131354.58+421242.1
    198.47743
    42.211710
    G



    20.8g
    0.19500000
    0
    0
    15
    1
    0
    4





    4
    SDSS J131354.67+421237.2
    198.47779
    42.210350
    G



    19.7g
    0.21600000
    0
    0
    23
    2
    0
    4





    5
    SDSS J131355.53+421258.1
    198.48140
    42.216150
    G



    21.1g
    0.21700000
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