26 june 2020

Frustrating night last night.  The forecast was for excellent transparency and good seeing, so I was prepared to stay out very late.  It was pretty much the opposite: marine haze turning to fog shutting me down early at 12:30am, and seeing that was poor even with the 8-inch mask.  I did what I could, observing mostly in northern Boötes & Hercules.  On the good side, I installed a wireless hand pad to the ServoCAT and the responsiveness is much improved over the wired version.  I'm really happy about that.

STF 1908 AB: 203; 333x: Wow! superfine B split with seeing, light orange stars. B is very faint next to A, a significant delta, >1" 
15H 04M 56.30S +34° 28' 02.7" P.A. 152 SEP 1.3 MAG 9.23,10.31 SP F8 DIST. 115.61 PC (377.12 L.Y.)

A 690 AB: 203; 333x: Very tough, seems fainter than 9th and 10th mag as given in SkyTools (and indeed it is, both fainter by another half mag), and also closer than 1".  With seeing only, significant delta mag, and very close, hairline only.
15H 09M 09.80S +28° 08' 48.2" P.A. 10 SEP 0.9 MAG 10.00,10.50 SP F8 DIST. 96.53 PC (314.88 L.Y.)

TDS 768 AB: 203; 333x: Very fine, light orange stars, just split as a hairline, significant mag difference, maybe 1 delta mag
15H 09M 58.47S +28° 06' 59.5" P.A. 12 SEP 0.9 MAG 10.17,10.62

HO 62 AB: 203; 205x: Equal white, close but nicely split ~1.5"
15H 20M 46.77S +34° 59' 00.8" P.A. 103 SEP 1.5 MAG 10.00,10.06 SP G5

A 1367 AB: 203; 333x: White stars, seeing needs to settle for the pair to flash, brighter with averted vision.  Hairline split in good seeing, snowman when seeing poor.  Did not notice AB-C, which is 13th mag 9"
15H 23M 16.44S +36° 18' 30.6" P.A. 156 SEP 0.6 MAG 10.96,11.01 SP G0

STF 1938 Ba-Bb: 203; 205x: Alkalurops. Nice! STFA 28 AB, A is very bright white and B is widely separated.  B has a near equal pair about ~5" separated
15H 24M 30.89S +37° 20' 52.5" P.A. 2.9 SEP 2.24 MAG 7.09,7.63 SP G0V DIST. 36.06 PC (117.63 L.Y.)


STF 1946 AB: 203; 205x: Easy light orange A and ~2 delta mag B, pretty wide ~8"
15H 27M 09.01S +39° 29' 35.5" P.A. 344 SEP 7.6 MAG 9.34,10.87 SP F5 DIST. 227.79 PC (743.05 L.Y.)

STF 1947 AB: 203; 205x: FL Boo. Near equal wide, no color noticed
15H 28M 09.87S +38° 21' 38.1" P.A. 26 SEP 6.8 MAG 9.98,10.39 SP K0 DIST. 109.41 PC (356.9 L.Y.)

COU 974 AB: 203; 205x: Faint bluish elongation, separated with seeing, very close, slight mag difference
15H 30M 33.20S +35° 04' 23.6" P.A. 338 SEP 1.5 MAG 10.59,11.32

STT 298 AB: 203; 205x: Fine but very good split ~1.5", yellow-white stars, slight mag difference.  AB-C wide, similar mag.  ** need to re-observe this is short period **
15H 36M 02.22S +39° 48' 08.9" P.A. 188 SEP 1.21 MAG 7.16,8.44 SP K2V DIST. 22.31 PC (72.78 L.Y.)

COU1444 AB: 203; 205x: With seeing, bluish near equal, nice split
15H 36M 19.03S +42° 59' 39.4" P.A. 310 SEP 1 MAG 10.58,11.50

STF 2084 AB: 203; 333x: Zeta Her.  Less good image than the other night, but with some fine focus and patience with the seeing I could recorded B's orientation for the short period project.
16H 41M 17.16S +31° 36' 09.8" P.A. 111.8 SEP 1.402 MAG 2.95,5.40 SP G1IV DIST. 10.72 PC (34.97 L.Y.)

BU 627 A-BC: 203; 333x: 52 Her. B seen quite well, though only with seeing when bright white A's diffraction settles.  B is a bluish disk ~2", very steady for a moment then lost again.  Looking too long direct seems to make B disappear, A overpowers one's vision, but with a little averted vision B comes back into view.  1977 year period.
16H 49M 14.21S +45° 58' 59.9" P.A. 40.5 SEP 2.12 MAG 4.84,8.45 SP A1V DIST. 55.25 PC (180.23 L.Y.)


A 1875 AB: 203; 333x: Very faint B ~3 delta mag, well separated ~3", with seeing
17H 00M 14.17S +43° 45' 15.2" P.A. 189 SEP 2.4 MAG 8.73,10.75 SP K0

STT 323 AB: 203; 205x: Easy yellow-white A and ~3 delta B, wide. Not physical
17H 05M 05.49S +46° 58' 01.7" P.A. 79 SEP 11.2 MAG 8.36,11.37 SP K3III DIST. 164.74 PC (537.38 L.Y.)

TDT 212 AB: 203; 333x: Faint elongation splits with seeing, near equal pair 
17H 05M 57.90S +46° 15' 53.6" P.A. 131 SEP 1.2 MAG 11.30,11.36

A 1644 AB: 203; 333x: Bluish, faint, slight mag difference, well split ~3"
17H 07M 47.13S +47° 27' 16.0" P.A. 211 SEP 2.3 MAG 10.37,11.56 SP G5

SLE 80 AB: 203; 333x: Faint near equal, wide.  Not physical
17H 08M 24.40S +46° 55' 55.3" P.A. 294 SEP 15 MAG 11.32,11.53

STF 2133 AB: 203; 333x: ~2 delta mag, wide ~5"
17H 08M 41.83S +49° 45' 19.3" P.A. 199 SEP 3.4 MAG 9.66,10.67 SP G0 DIST. 151.98 PC (495.76 L.Y.)

STF 2152 AB: 203; 333x: Equal pair, split with seeing, ~2"
17H 17M 45.83S +45° 35' 00.2" P.A. 238 SEP 2 MAG 9.79,9.89 SP F8

STF 2153 AB: 203; 333x: Near equal, ~2", white.
17H 17M 53.03S +49° 18' 18.5" P.A. 245 SEP 1.4 MAG 9.36,9.70 SP K0

STF 2164 AB: 203; 333x: Very light orange A and slightly bluish B, ~2 delta mag, wide.
17H 23M 44.61S +47° 16' 14.3" P.A. 13 SEP 9.3 MAG 8.16,9.81 SP F8 DIST. 84.82 PC (276.68 L.Y.)

A 2089 AB: 203; 333x" Blue and faint pair, slight magnitude difference, hairline split with seeing only
17H 24M 55.24S +47° 01' 18.1" P.A. 330 SEP 0.7 MAG 9.95,10.11 SP F5

STF 2177 AB: 203; 205x: Pretty ~2 delta mag, wide ~4".  A nice combination of magnitudes, B is
just bright enough to be seen, difficult but not too difficult.
17H 27M 48.32S +46° 25' 16.4" P.A. 134 SEP 3.7 MAG 9.20,10.70 SP F0

ES 1414 AB: 203; 205x: Faint, with a noticeable mag difference about half delta mag, pretty wide
17H 29M 54.49S +43° 34' 55.6" P.A. 228 SEP 7 MAG 10.95,11.40

HU 923 AB: 203; 333x: Near equal, slight mag difference, really tried hard to split with 205x but most I could get was tangent disks; with 333x I can get split but with seeing only
17H 34M 22.97S +49° 12' 51.4" P.A. 105 SEP 0.9 MAG 9.49,9.90 SP G0

ES 2660 AB: 203; 205x: Easy wide, white, near equal
17H 37M 13.60S +43° 08' 52.5" P.A. 154 SEP 9.4 MAG 10.16,10.16 SP G

ES 1257 AB: 203; 205x: ! Very cool.  First noticed is a wide pair same mag (AC) but there's a close pair to the B star (BC) one of them, near equal ~3" (not physical!)
17H 38M 13.95S +45° 00' 23.3" P.A. 297 SEP 2.5 MAG 10.45,10.90

STF 2210 AB: 203; 205x: White A and two delta B, ~3", really pretty pairing at these magnitudes.  Not physical!

17H 42M 11.03S +49° 00' 09.3" P.A. 121 SEP 3.2 MAG 8.93,10.63 SP K0 DIST. 337.84 PC (1102.03 L.Y.)