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About 7pm (UT) the Moon had disappeared and it was time for a night of deepsky observing. To warm up I first visited a few "old friends" like the Pleiades, M 42, Orion's Belt, M 44, and M 35. After that I started to hunt down a few new objects, 3 double stars, a galaxy, 3 globular clusters and a carbon star. I sketched the field of view of the double stars and the carbon star, to verify them next day (just to be sure it where the one's I was looking for). I also made a sketch of the galaxy and it's surrounding star-field, to see if I got the orientation and its size right. The sketches are all included in this report. |
1. Zeta Cancri
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This is a triple star in Cancer. I could only detect split two components (already at 100x). I could not split the AB pair. They have a separation of 0.8", while the AB and C components are separated by 5.7". The colour of both components was yellow. They are easy to locate. In Gemini, go from Castor to Pollux and extend this line with two times the same length. Then you are in the area of Zeta Cancri. With its distinct colour, you cannot miss it. |
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2. Iota Cancri
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This one is also easy to locate, Just have a look in your star atlas at the constellation of Cancer. There is one line of the constellation that stretches north, passing M 44. At the end of this line you will find Iota Cancri. I never had seen it before, but when my telescope came across it, using a 62.5 magnification I was stunned. It almost looks like Albireo, a bright yellow, accompanied by a somewhat fainter blue star. |
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3. Algieba (Gamma Leonis)
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This wonderful double star lies at the centre of "the Sickle" in the constellation of Leo, 8 degrees north-northeast of Regulus (Alpha Leonis). Both companions are bright yellow, with magnitudes of 2.2 and 3.5. the separation is 4.4". The B component lies in a position angle of 127 degrees. |
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4. NGC 2903
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From my backyard, which is heavily light polluted, I cannot see too much galaxies. In an article in sky and telescope I read that NGC 2903 was even brighter than M 65 and M66, but for an unknown reason was not included in the Messier catalogue. I decided to go for it. Again, this object is easy tot locate, because there are some bright stars in the Lion's head that will guide you to NGC 2903. In the lion's head, locate 17 Epsilon Leonis. From there go about three degrees to the west to 4 Lambda Leonis. NGC 2903 lies only 2 degrees south of this star. |
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5. M 53, M 3 and M 13
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Now it was time for some globular clusters. First I had a look at M 53, which lies only 1 degree to the north-west of Alpha Coma Berenices. With the 8-inch telescope at 80x I only saw it as a nebulous smudge of light. At 166x I could partially resolve the stars around the edges of the cluster, but I had to use averted vision to do so. |
6. La Superba
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In Canes Venatici lies La Superba ( Y Canum Venaticorum, variable star), a carbon Star. Carbon stars are cool red giants with a lot of carbon molecules in their atmosphere, causing absorption of blue light. That's why these stars look "deep red". La Superba again is easy to spot. From 12 Alpha Canum Venaticorum ( Cor Carolis) go to 8 beta Canum Venaticorum (Chara). From Chara go about north-northeast. There you will find the "red" star. At 100x there where only four other stars in the field of view (about 30'). The limiting magnitude was about 12 to 12.5 at that moment. The colour was deep orange at the moment. It really stood out from its surroundings. |
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