I made a project of viewing globular cluster Messier 30 again over three nights.
I located the object by drawing a triangle from Delta Capricorni (Deneb Algiedi - tail of the Goat), and Zeta Capricorni and the expected position of Messier 31 which was not visible. I found that dropping vertically not from Delta Capricorni, as recommended by Sue French in Celestial Sampler but from Nashira (Gamma Capri) to the same altitude as Zeta Cap worked better. M30 is as far east from Zeta as Delta is from Gamma. I found Messier 31 in the field of view.
Last night I investigated the star to the east of M30, which according to the Sky & Telescope Pocket Sky Atlas (Jumbo Edition) is a double. I could not split it. I used these oculars (eyepieces):
Meade 5000 14 mm. = 47X
Tele Vue 7 mm = 94X
Stellarvue 4mm = 165X
Tele Vue 7mm + 2X Barlow = 188X
That last did make the center of M30 a little sparkly and showed more of the elongaged shape of the cluster, but the overall view was poor at high magnification.
PREVIOUSLY ON NECESSARY FACTS
Binocular Highlights (Book Review)
No comments:
Post a Comment
Note: Only a member of this blog may post a comment.