31 march 2021

Last night was predicted to be excellent seeing, but frustratingly turned into another average night, so I was masked to 7-inches the whole time.  And the Argo was having pointing accuracy problems.  On the bright side there was less marine haze to deal with. I wrapped up a bit early as I felt tired.

STF1482 AB; 178; 205x: Very light orange, wide, 1 delta mag.  Physical
10h 52m 10.61s +07° 27' 39.4" P.A. 305.00 sep 12.0 mag 8.25,9.20 Sp G5 dist. 121.21 pc (395.39 l.y.)

BU 599 AB: 178; 333x: A is a very light orange, and when seeing stills and the diffraction rings are steady, B appears as the tiniest fleck, well outside the first ring about 3", a deeper duller orange color.  Physical.  Burnham discovered with the 18.5-inch Washburn refractor at 1.8" -- his extra aperture helped as mine is wider but with just a 7-inch, and explains why Struve never saw it.  He wrote: "It is obvious from the measures that this belongs also to the small star, and they must form a physical system." 
11h 06m 54.20s +01° 57' 19.9" P.A. 106.00 sep 2.8 mag 5.65,9.72 Sp G9IIICN dist. 63.21 pc (206.19 l.y.)

STF1504 AB: 178; 205x: Lovely split, small scale at this magnification, white stars, <1 delta mag, very clean image with seeing.
11h 03m 58.93s +03° 38' 19.3" P.A. 126.00 sep 1.2 mag 7.92,8.05 Sp F0 dist. 221.73 pc (723.28 l.y.)

A 2565 AB: 178; 205x: Amazingly I'm able to split it at 205x, 2 delta mag white stars, little more than 1" separation, very small scale
10h 10m 54.49s +07° 41' 40.5" P.A. 260.00 sep 1.3 mag 8.80,10.29 Sp F2 dist. 135.69 pc (442.62 l.y.)

STF1431 AB: 178; 205x: Delicate light blue pair, >1 delta mag, 3" separation, not far from a bright light orange star 44 Leo. Very pretty view
10h 25m 35.12s +08° 46' 35.4" P.A. 76.00 sep 3.6 mag 7.76,9.07 Sp A8III dist. 151.98 pc (495.76 l.y.)

STF1446 AB: 178; 205x: Fairly faint for a Struve, 1 delta mag, pretty wide, white.  Physical.
10h 33m 33.32s +15° 12' 49.6" P.A. 250.00 sep 5.5 mag 9.29,10.03 Sp G0 dist. 128.7 pc (419.82 l.y.)

PTT 11 AB: 178; 205x: Faint pair white, B flashes brighter with averted vision.  New designation, E. Pettit, active in the early 20th century.
07h 47m 02.38s +38° 32' 22.5" P.A. 6.00 sep 4.6 mag 9.10,10.40

MAD 3 AB: 178; 333x: Very faint equal pair near STT 174, amazingly not physical.
07h 35m 45.61s +43° 02' 05.3" P.A. 120.00 sep 3.7 mag 9.90,9.90

STT 174 AB: 178; 333x: Lovely white and dull blue, 2 delta mag and 2" separation.  Faint pair MAD 3 in same FOV making a double-double.
07h 35m 56.00s +43° 01' 51.4" P.A. 92.00 sep 1.9 mag 6.62,8.26 Sp F0 dist. 140.65 pc (458.8 l.y.)