145 CMa (aka HJ 3945)
BLUE GOLD PAIR - CANIS MAJOR
(ra: 07:17.1 / dec -23:20)
CLICK IN THE IMAGE FOR A HIGH RESOLUTION VIEW
October 2012, - Camping La Porteņa, Areco, Buenos Aires - Argentina
TYPE: Star Pair / Double Star
VISUAL BRIGHTNESS: HJ 3945 4.83 & HIP 35213 6.02
STAR SEPARATION: 26 arc seconds
DISTANCE: HJ 3945 6272 light years & HIP 258 light years
SCOPE: ORION OPTICS UK 6" f5 Newtonian
CAMERA: QSI 583 WS
GUIDING: LodeStar in Synta 70/400 refractor / PHD Guiding
FILTERS: Baader LRGB Set
SKY CONDITIONS: Rural Skies.
EXPOSURES: LRGB (4,3,3,3) for a total exposure time of 12 minutes
PROCESSING: Images Plus / Photoshop CS2
OBJECT DESCRIPTION AND IMAGE SESSION
145 Cma is known as the Winter Albireo, however enthusiasts from the southern hemisphere call them the Southern Albireo. This beautiful pair is well visible on urban skies even with small telescopes. The primary is yellowish-orange and the companion is a pale bluish white. As increasing magnification the colours began to fade compare to the Albireo in Cygnus. This stars are not related and can be seen only as a pair because the perspective towards the Earth.
To find 145 Cma and its companion you have to look for NGC 2362 Mg 3.8 or Tau CMa Mg 4.4. Once there go to the north in a straight line a bit more than one and a half degree.
We were running out time and looking for a easy photographic target. Our friend Luis Argerich proposed this nice pearl and also provide the data to locate it. Thanks Luis !!