Double Stars - Bootes

  • Note:

    All images are at 1:1 scale taken with the same equipment (120mm refractor with the appature reduced to 30mm, 1000mm FL, Canon 450D DSLR) and same magnification unless stated. The Canon 450D gives equivilent to a 12mm EP, giving a mangnification factor of approximatly 80x. This means that the split between all stars can be compared against each other. Exposure times and ISO levels are adjusted to give best image of both components but on average they are 10 seconds at ISO 400


  • 22:42 BST      20-04-2013

    Kappa Boo

    The first of my doubles in Bootes, the primary magnitued of 4.6 against the secondary of 6.6 make it fairly easy to image and split. A simple one to start with although a bright primary.
    Details: Constellation: Bootes    RA: 14h 13' 27.7"    Dec: +51° 47' 20.0"    PA: 236º     Separation: 13.4"


  • 22:45 BST      20-04-2013

    Iota Boo

    The second of my doubles in Bootes, the primary magnitued of 5 against the secondary of 7.5. A nice wide separation of 38 arc seconds make this very easy.
    Details: Constellation: Bootes    RA: 14h 16' 9.9"    Dec: +51° 22' 02.0"    PA: 33º     Separation: 38.5"


  • 22:49 BST      20-04-2013

    STF 1838 (HIP 70386)

    Next, a tighter double of two equal magnitudes 7.0 stars, with separation of 9 arc seconds, very easy to split.
    Details: Constellation: Bootes    RA: 14h 24m 05.7s    Dec: +11° 14' 49.1"    PA: 334º     Separation: 9.1"


  • 22:54 BST      20-04-2013

    STF 1843 (HIP 70447A & HIP 70446B)

    Slightly wider separatiion with magnitudes of 7.6 and 9.4, this pair can be found towards the top right of Bootes.
    Details: Constellation: Bootes    RA: 14h 24m 38.6s    Dec: +47° 49' 30.3"    PA: 187º     Separation: 20"


  • 22:57 BST      20-04-2013

    STF 1850 (HIP 70786A & HIP 70781B)

    Another pair with similar magnitudes of 7 and 7.5, a good separation of nearly 26 arc seconds made this a nice easy double to image.
    Details: Constellation: Bootes    RA: 14h 28m 33.3s    Dec: +28° 17' 25.9"    PA: 262º     Separation: 25.6"


  • 23:01 BST      20-04-2013

    STF 1854

    Magnitudes of 7.0 and 10.5 make this double very difficult to image without over exposing the primary. The secondary in this image can just be seen around the 1.30 position but compared to the next double, the secondary appears very dim.
    Details: Constellation: Bootes    RA: 14h 29m 56.8s    Dec: +31° 46' 32.4"    PA: 256°     Separation: 25.8"

  • 23:05 BST      20-04-2013

    STF 1889

    A nice double with magnitudes of 6.5 and 10.0, make this one just slightly easier to image than the last pair.
    Details: Constellation: Bootes    RA: 14h 49m 33.9s    Dec: +51° 22' 28.9"    PA: 88°     Separation: 15.7"

  • 23:10 BST      20-04-2013

    STF 1886

    Magnitudes of 7.0 and 9.0 with a separation of just 7.7 arc seconds, made this one a tight one to split, however the secondary can clearly be seen
    Details: Constellation: Bootes    RA: 14h 51m 1.9s    Dec: +09° 43' 19.8"    PA: 227°     Separation: 7.7"



  • 23:12 BST      20-04-2013

    STF 1888 (Xi Boo) (HIP 72659)

    With magnitudes of 5 and 7 combined with a separation of just under 7 arc seconds, this was a very tight double to split and is just on the edge of my resolving power.
    Details: Constellation: Bootes    RA: 14h 51m 23.4s    Dec: +19° 06' 01.7"    PA: 347°     Separation: 6.9"



  • 23:17 BST      20-04-2013

    STF 1895 (HIP 73185 & 6)

    A similar magnitued 8.2 & 8.8 double with a separatiion of 8.5 arc seconds made this a nice easy, but faint double to image.
    Details: Constellation: Bootes    RA: 14h 57m 27.9s    Dec: +40° 09' 42.2"    PA: 43°     Separation: 12.5"



  • 23:20 BST      20-04-2013

    ADS 9474

    A wider spaced pair now of 40 arc seconds, with almost equal magnitudes of 7 and 7.5 made this a very easy double to image.
    Details: Constellation: Bootes    RA: 14h 59m 34.6s    Dec: +53° 51' 36.8"    PA: 342°     Separation: 40.5"



  • 23:24 BST      20-04-2013

    ADS 9477B (STT 291) (V* BX Boo)

    This one is a confusing one, it is listed under several catalogue names with different information. The pair is listed as magnitudes 6 and 8.5.
    Details: Constellation: Bootes    RA: 15h 00m 38.7s    Dec: +47° 16' 38.8"    PA: 156°     Separation: 35.6"



  • 23:32 BST      20-04-2013

    ADS 9527 (STF 1916B) (SAO 64528)

    A nice close pair at just under 10 arc seconds with magnitudes of 7 and 9.5 make this a good choice for splitting.
    Details: Constellation: Bootes    RA: 15h 09m 54.1s    Dec: +38° 58' 33.0"    PA: 330°     Separation: 9.9"



  • 23:36 BST      20-04-2013

    SAO 64550 (STF 1921) (HIP 74382 & HIP 74378)

    An easy one this time with an even magnitue pair of 7.0 and spacing of 30 arc seconds makes for a good viewing pair.
    Details: Constellation: Bootes    RA: 15h 11m 57.5s    Dec: +38° 40' 19.0"    PA: 283°     Separation: 30.4"



  • 23:40 BST      20-04-2013

    ADS 9539 (SAO 45436)

    A wide spaced pair with magnitued of 7 and 10.5, makes the secondary quite faint but still visible in this image. The star to the bottom left of the image is shown as 12 mag, but is unnamed.
    Details: Constellation: Bootes    RA: 15h 12m 43.7s    Dec: +48° 34' 50.8"    PA: 343°     Separation: 25.8"



  • 23:42 BST      20-04-2013

    DELTA BOO (SAO 64589)

    A very wide and very bright pair, the magnitude 3.5 primary makes the magnitude 7.5 secondary look very dim, but this is due to the exposure settings quite short as to not over expose the primary.
    Details: Constellation: Bootes    RA: 15h 15m 30.2s    Dec: +33° 18' 53.4"    PA: 79°     Separation: 105"



  • 23:45 BST      20-04-2013

    MU BOO (Alkalurops)

    Separated from the primary by 108 arcseconds in the sky is the binary star Mu2 Boötis, The magnitude 4.5 primary and 6.5 secondary show as a bright pair. The secondary appears slightly elongated due to a third component separated by 2.2 arcseconds.
    Details: Constellation: Bootes    RA: 15h 24m 29.4s    Dec: +37° 22' 37.8"    PA: 171°     Separation: 108"


  • 23:57 BST      20-04-2013

    STF 1902

    And finally for this session a pair of eyes in the dark, close magnitudes of 9 and 9.5 with a 25.9 arc second separation, make this a nice pair to end with.
    Details: Constellation: Bootes    RA: 15h 01m 51.9s    Dec: +15° 46' 52.1"    PA: 187°     Separation: 25.9"