Tuesday, January 24, 2023

23 january 2023, 60mm

I finally had the opportunity to strap my "new old" Tasco 7TE-5 refractor to my 6-inch.  60mm with a 1000mm focal length, 1960s vintage.  After cleaning fungus off the objective and flocking, it gave some pretty sharp terrestrial views.  On the scope I only used very low power (just to align it with the 6-inch), but it was pretty sharp too.  There is some vignetting, probably from my flocking, which I will fix at some point.  It causes some balance problems on the mount, and I'm a little worried about it going out of alignment under the rain tarp, but these are all problems which can be resolved with time.

I made a few observations of Struve pairs.  Seeing was quite poor so I didn't stick with it for long.  It was also the first time using SkyTools with a new laptop, and I found some issues to fix too (screen brightness, screen settings, etc.).

STF 984 AB: 152; 200x: In poor seeing it apears mostly as an elongated smudge, hardening at the ends with seeing to a very close split.  WDS says not physical, and there is -74% parallax range overlap, it is not.
06h 56m 16.59s +32° 26' 41.4" P.A. 155.00 sep 3.3 mag 8.67,10.80 Sp G5

STF1054 AB: 152; 125x: 1 Dm, pretty wide, with a C pair in a similar PA a little further out.  WDS says parallax indicates physical, but the Gaia DR3 data shows -78% parallax range overlap, much too far to be binary.
07h 18m 05.48s +34° 57' 06.3" P.A. 292.00 sep 18.7 mag 8.16,9.96 Sp F2 dist. 139.08 pc (453.68 l.y.)

STF 983 AB: 152; 200x: B appears with averted vision only, 3 Dm, fairly wide.  It lies within a triangle of near equal magnitude stars.  WDS says it is not physical, and there is no parallax range overlap.
06h 56m 13.67s +34° 27' 32.7" P.A. 36.00 sep 10.7 mag 8.70,12.70 Sp B9

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