Double Stars

  • Note:

    All images are at 1:1 scale taken with the same equipment (120mm refractor, 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 4 seconds at ISO 400

  • 22:42 UTC      13-01-2013

    145 CMa

    This nice colour contrasting pair was taken while it was low on the Southern horizon where atmospheric conditions were at their worst, yet the image has come out suprisingly well.
    Details: Constellation: Canis Major    RA: 7h 16' 36.8"    Dec: -23° 18' 26.0"    PA: 54º     Separation: 26.8"

  • 00:05 UTC      10-01-2013

    Mintaka

    The very bright primary (2.5) made it difficult to image the secondary (6.6) due to the high contrast. However the secondary is clearly visible to the top right.
    Details: Constellation: Orion    RA: 5h 32' 0.4"    Dec: -0° 17' 57.0"    PA: 0º     Separation: 52.0"


  • 00:09 UTC      11-01-2013

    83 Leo

    This double shows slight colour and size difference, the secondary appearing slighty orange. With magnitueds of 6.4 and 7.4 respectively they are both bright objects. Note the size difference between this pair and others, as all images are presented to the same scale.
    Details: Constellation: Leo    RA: 11h 26' 45.7"    Dec: +3° 0' 45.6"    PA: 150º     Separation: 28.5"

  • 23:05 UTC      10-01-2013

    STF 1060

    This double in Monocero has magnitueds of 8.7 & 9.7 and just over 1226 light years away, has a split of just under 7 acr seconds, making it very dificult to split.
    Details: Constellation: Monocero    RA: 7h 16' 6.7"    Dec: -09° 16' 10.9"    PA: 25°     Separation: 6.9"

  • 22:48 UTC      10-01-2013

    STF 1064

    Slightly wider seperation, with magnitueds of 6.9 and 8.9 respectively. Easy to split, but not so easy to image due to the differnece in magnitueds.
    Details: Constellation: Canis Major    RA: 7h 17' 7.0"    Dec: -12° 02' 01.6"    PA: 240º     Separation: 15.6"


  • 23:47 UTC      10-01-2013

    STF 1198

    An equal magnitued, nicely spaced pair. With mangnitueds of 8.6, this required a slightly longer exposure of 15 seconds to image.
    Details: Constellation: Canis Minor    RA: 8h 11' 16.0"    Dec: +01° 16' 05.5"    PA: 157º     Separation: 33.3"


  • 23:17 UTC      10-01-2013

    STF 1245

    A nice little double, close but good contrast between the two parts. Magnitudes of 6 and 7.2, make it fairly easy to image.
    Details: Constellation: Cancer    RA: 8h 35' 51.0"    Dec: +06° 37' 13.9"    PA: 24º     Separation: 10.2"

  • 23:58 UTC      10-01-2013

    STF 1255

    A nice, fairly wide spaced pair. Magnitues of 7.3 and 8.5 and a distance of 117 LY's. This is actually part of a quadruple system, the other two stars, not visible in this image but are magnitude 14 and 13.5.
    Details: Constellation: Hydra    RA: 8h 39' 43.7"    Dec: +05° 45' 54.0"    PA: 31º     Separation: 26.1"

  • 22:48 UTC      10-01-2013

    STF 1268 (Iota Cancri)

    A bright double with magnitueds of 4.1 and 6.0, at a distance of 188 LY's, both parts show well in this image although exposute was more difficult to obtain on the brighter primary.
    Details: Constellation: Cancer    RA: 8h 46' 41.8"    Dec: +28° 45' 35.6"    PA: 307º     Separation: 30.4"