16 June 2020

Seeing last night was too poor for large aperture, so I used the 8-inch mask throughout -- and even then seeing was a little choppy. Transparency also disappointing, the typical thin haze puddling in the Bay Area. Nevertheless a good session; started in CVn and ended in Serpens. I could have kept going past when I closed up at 11pm, but I felt a bit tired and getting more tired was not worth the conditions.

I really appreciate the new foveal coaxing technique -- it helps to hold stars with direct vision and with more certainty than averted vision alone. Really glad I read about it.

A 2000 AB: 203; 205x: Good clean split ~1", slight magnitude difference. A very pretty pair.
12H 56M 19.66S +43° 00' 03.3" P.A. 47 SEP 1 MAG 9.75,10.20 SP G5V

BU 930 AB: 203; 205x: ! With foveal coaxing the B star shines as a very small faint point considerably outside light orange A's diffraction ring. Needed finest focus to reduce A' disk size.
13H 05M 52.28S +45° 16' 06.6" P.A. 123 SEP 2.5 MAG 5.60,10.00 SP K0III DIST. 132.63 PC (432.64 L.Y.)

STF 1723 AB: 203; 205x: Light yellow-orange stars, almost 2 delta mag, wide split.
13H 08M 13.49S +38° 44' 20.2" P.A. 12 SEP 6.3 MAG 8.67,10.08 SP G2IV-V DIST. 73.05 PC (238.29 L.Y.)

STT 261 AB: 203; 205x: Pretty white near equal stars, well split. Physical, 860 year period.
13H 12M 02.02S +32° 05' 07.9" P.A. 338.3 SEP 2.61 MAG 7.40,7.64 SP F6V DIST. 72.52 PC (236.56 L.Y.)



STF 1730 AB: 203; 205x: Very pretty white star and more than 1 delta mag B star, ~2", nice split. B is reddish color due to faintness (K0 spec, yellow-orange)
13H 12M 04.84S +36° 54' 31.1" P.A. 338 SEP 1.9 MAG 9.23,10.43 SP K0 DIST. 282.49 PC (921.48 L.Y.)

A 1606 AB: 203; 205x: Very fine, faint pair, splits with seeing, ~1 delta mag & ~1"
13H 12M 47.68S +40° 30' 14.5" P.A. 17 SEP 1.3 MAG 9.58,9.59 SP K0 DIST. 180.83 PC (589.87 L.Y.)

HU 1146 AB: 203; 205x: B star seen with foveal coaxing only, well separated, but disappears with direct vision, can't hold it
13H 17M 27.20S +36° 48' 54.0" P.A. 28 SEP 5.6 MAG 8.75,11.84 SP K0III DIST. 813.01 PC (2652.04 L.Y.)

STF 1755 AB: 203; 205x: Light yellow-orange A and more than 1 delta mag paler B, ~3" separation. Not physical.
13H 32M 21.99S +36° 49' 05.6" P.A. 133 SEP 4.1 MAG 7.34,8.10 SP G5III DIST. 206.61 PC (673.96 L.Y.)

A 1610 AB: 203; 333x: Hairline with seeing, near equal blue stars, very tough.
13H 33M 19.30S +45° 26' 20.4" P.A. 269 SEP 0.9 MAG 9.72,10.04 SP A5

STF 1768 AB: 203; 205x: ! 25 CVn Very lovely diamond ring pair, bright white A and ~2 delta B, which is on A's first diffraction. Very nice pair. 228 year period
13H 37M 27.70S +36° 17' 41.4" P.A. 93.9 SEP 1.67 MAG 4.98,6.95 SP A7IV DIST. 60.9 PC (198.66 L.Y.)



STF 1769 AB: 203; 205x: ! What a cool pair. Using foveal coaxing, I could bring out the extremely faint B star and hold direct, a little more than 1", sitting slightly outside A's diffraction ring. Very nice, had to work for that one.
13H 38M 01.95S +39° 10' 41.0" P.A. 45 SEP 1.6 MAG 7.91,10.42 SP G5 DIST. 46 PC (150.05 L.Y.)

AG 191 AB: 203; 205x: Easy near equal, wide separation. Not physical
13H 39M 22.88S +35° 35' 59.7" P.A. 299 SEP 9.3 MAG 9.82,10.09 SP F8+K2

STF 1783 AB: 203; 205x: B is very faint and barely seen, more hazy outside of A's diffraction. A is light orange.
13H 46M 02.79S +41° 02' 16.1" P.A. 48 SEP 2.3 MAG 7.82,10.88 SP K0 DIST. 257.73 PC (840.72 L.Y.)

A 1613 AB: 203; 205x: Nice close pair, a little less than 1 delta mag, ~3" separation
13H 50M 54.00S +44° 22' 11.3" P.A. 261 SEP 3.1 MAG 10.23,10.63 DIST. 309.6 PC (1009.92 L.Y.)

STF 1789 AB: 203; 205x: Very wide near equal
13H 54M 05.19S +32° 49' 35.2" P.A. 328 SEP 6.7 MAG 8.63,8.97 SP F8 DIST. 71.43 PC (233 L.Y.)

STF 1987 AB: 203; 205x: White A and light orange-yellow B, ~2 delta mag, wide
15H 57M 14.92S +03° 24' 19.2" P.A. 320 SEP 10.4 MAG 7.31,8.71 SP A0V+B6V DIST. 179.21 PC (584.58 L.Y.)

STF 3101 AB: Near equal, nice split ~2"
15H 58M 52.79S -03° 04' 23.1" P.A. 74 SEP 2.2 MAG 8.97,9.09 SP G0 DIST. 69.69 PC (227.33 L.Y.)

BAL 238 AB: 203; 205x: Faint well split B, a little difficult, need averted vision to brighten it up
16H 06M 31.23S -02° 44' 58.5" P.A. 292 SEP 6.8 MAG 10.02,11.80 SP K2

STF 2008 AB: 203; 205x: Easy, ~1 delta mag, wide ~10"
16H 07M 36.12S -02° 39' 00.7" P.A. 58 SEP 9.1 MAG 9.28,10.07 SP F5 DIST. 79.81 PC (260.34 L.Y.)

STF 2033 AB: 203; 205x: White A and slightly orange B, virtually equal, wide ~7"
16H 18M 10.62S -02° 16' 13.8" P.A. 174 SEP 10.8 MAG 9.12,9.17 SP A3 DIST. 230.95 PC (753.36 L.Y.)