fun with 80mm

I misjudged the weather last night. During the late afternoon a cool wind started, and that usually means the marine layer is on its way. So, I didn't open up. It turns out the sky did have a thin haze, but was not covered over, and the seeing was about average. So I brought out my 80mm f/15, which I've mainly used for solar observing, and set-up in the back yard. It has really good optics, and when matched with a 2" prism diagonal, produces very nice images. I only had a Telrad to find stars, but I think I'll add a finder scope to help navigate to fainter stars, since it would save having to swap eyepieces. As it was I found all the bright stars just with the Telrad. I'd even consider using an equatorial mount rather than the alt-az, maybe at least at a dark site. As always, it's always better to go out and observe...

Since I was using the CDSA 2nd edition, all of these are physical unless noted:

STF 1351: 80; 92x: 23 UMa.  Light yellow and much fainter wide B. 
09h 31m 31.57s +63° 03' 42.5" P.A. 267.00 sep 22.7 mag 3.65,9.19 Sp F0IV dist. 23.82 pc (77.7 l.y.)

STF 1315: 80; 92x: White, wide, near equal.

09h 12m 45.94s +61° 40' 32.7" P.A. 28.00 sep 25.1 mag 7.33,7.65 Sp A3IV dist. 100.2 pc (326.85 l.y.)

STF 1306: 80; 150x: Suspected very close unequal white stars.  920-year period, slowly widening

09h 10m 23.53s +67° 08' 03.3" P.A. 346.30 sep 4.5 mag 4.87,8.85 Sp F7V dist. 20.38 pc (66.48 l.y.)

STF1692 AB: 80; 92x: Cor Caroli, showpiece, almost three detla mag and nicely split.  Nice round star images.

12h 56m 01.67s +38° 19' 06.2" P.A. 230.00 sep 19.5 mag 2.85,5.52 Sp A0pSiEuHg dist. 35.2 pc (114.82 l.y.)

STF1877 AB: 80; 150x: Izar: Dull yellow-orange A and dull orange B, nice round images so split easily.  No parallax for the B star, so it's uncertain if physical

14h 44m 59.14s +27° 04' 29.9" P.A. 347.00 sep 2.8 mag 2.58,4.81 Sp K0II-III dist. 62.11 pc (202.6 l.y.)

STF1670 AB: 80; 92x: Porrima.  Nice and easy, yellow-white equal stars.  169-year period.

12h 41m 39.60s -01° 26' 57.9" P.A. 357.50 sep 2.9 mag 3.48,3.53 Sp F0V+F0V dist. 11.68 pc (38.1 l.y.)

STF 1724: 80; 92x: Extremely faint B, just visible, brighter white
13h 09m 57.01s -05° 32' 20.1" P.A. 342.00 sep 6.8 mag 4.40,9.39 Sp A0IV dist. 96.81 pc (315.79 l.y.)

STF 1764 80; 92x: Extremely faint B flashes with averted vision only.  Lower to horizon and in haze, so it was more difficult to see the faint star.

13h 37m 44.01s +02° 22' 56.5" P.A. 31.00 sep 16.1 mag 6.79,8.56 Sp K2III dist. 625 pc (2038.75 l.y.)

STF 1523 AB: 80; 150x: Alula australis.  Slight magnitude difference, hairline split, light yellow A and darker yellow B.

11h 18m 10.90s +31° 31' 45.0" P.A. 152.60 sep 2.2 mag 4.33,4.80 Sp F9V+G9V dist. 10.42 pc (33.99 l.y.)

BU 603 AB: 80; 150x: Elongated but not split.  129-year period.

11h 48m 38.71s +14° 17' 03.2" P.A. 327.70 sep 1.0 mag 5.97,8.53 Sp A8III dist. 59.74 pc (194.87 l.y.)

STFB 7 AB: 80; 92x: 93 Leo.  Pretty orange and blue, wide, 2 delta mag.

11h 47m 59.23s +20° 13' 08.2" P.A. 355.00 sep 74.9 mag 4.59,9.03 Sp A7V dist. 71.33 pc (232.68 l.y.)