Monday, September 2, 2019

1 september 2019

Seeing was slightly better compared to the 31st, at least in the beginning of the session. Transparency still middling and really hindered views of fainter stars, especially when close to the A star. I started around 9:30pm and stopped around midnight, when the seeing suddenly took a sharp turn for the worse.

COU 1792
AB: 20" 667x: Very faint but just split with seeing when haze reduces to points, one slightly brighter than the other
18h 45m 01.28s +40° 51' 28.8" P.A. 347 sep 1.1 mag 11.03,12.00

STF 2392 AB: 20" 667x: Obvious slightly blue stars, well split, 2 delta mag. Part of a two plus one with the other much further split and a little fainter than B [AC. There is a BC pair, 11th mag, 26"]
18h 45m 09.99s +39° 13' 32.8" P.A. 319 sep 2.5 mag 9.25,11.07 Sp A2 dist. 934.58 pc (3048.6 l.y.)

ES 2020 AB: 20" 667x: B star flashes into view with averted vision, three delta mag, >3", can hold direct intermittently with seeing and transparency
18h 45m 09.42s +37° 56' 11.5" P.A. 342 sep 3.5 mag 10.33,12.00

COU 1608 AB: 20" 667x: Using averted vision, can stretch the haze around B and barely resolve a point ~1" separated. Extremely faint, at limit
18h 45m 17.02s +38° 55' 51.4" P.A. 224 sep 1 mag 11.48,13.60

BU 137 AB: 20" 667x: Nice bright white near equal stars, 1.5", in a two plus one system with much fainter farther C. [AC 12th mag 23.6"]18h 53m 57.56s +37° 22' 49.7" P.A. 169 sep 1.5 mag 8.69,9.02 Sp G5III-IV

HO 90 AB: 20" 667x: Light orange star, B shows up only with averted vision, appears out of the haze as a brightening.
18h 54m 27.98s +37° 18' 45.5" P.A. 228 sep 4 mag 8.72,12.70 Sp K5

ES 2029 AB: 20" 667x: Easy wide pair, slightly blue-white. B is more blue, since fainter. 2 delta mag. [not physical]18h 54m 51.46s +36° 10' 49.8" P.A. 207 sep 5.1 mag 10.02,11.36 Sp A4

L 41 AB: 20" 667x: B reveals itself with averted vision, and as its haze fades can hold a tiny point well separated, 3 delta mag.
18h 54m 34.41s +36° 59' 48.6" P.A. 32 sep 1.7 mag 9.69,10.70 Sp F0:

TDT 1125 A;2019 September 1 10:35p;20";in same field as L 41. Very fine, hairline split only with seeing elongated otherwise.18h 55m 04.61s +36° 11' 08.7" P.A. 345 sep 0.5 mag 10.93,11.05 Sp G2V

ES 2236 AB: 20" 667x: B seen averted vision only, fades to point in its after glow--like an old tube tv turning off. Wide split, big delta mag
19h 00m 12.11s +34° 48' 24.7" P.A. 178 sep 7.4 mag 9.25,13.20 Sp A5

ALI 382 AB: 20" 667x: Widely separated faint stars, I wonder how thought it was a double: similar mag, proper motion, spectra? [not physical]19h 01m 15.00s +36° 20' 50.1" P.A. 78 sep 14.7 mag 11.97,11.69

ES 1965 AB: 20" 667x: Easily picked out, 2 delta mag, wide separated stars, pretty
19h 02m 04.33s +36° 39' 47.3" P.A. 245 sep 7.5 mag 10.71,12.50

ADS 11984 AB = WDS J19030+3729A: 20" 667x: Near equal, well separated pair, may be in plus one system with other near star in line with the main pair. In a pretty triangle asterism with brighter stars.

ALI 613 AB: 20" 667x: Wide separation, near equal faint stars. Can see it direct vision. Averted vision needed at thirteenth magnitude if close to another star. Not a challenge at all [not physical]19h 03m 36.82s +37° 24' 49.7" P.A. 237 sep 9 mag 13.30,13.60

STF 2448 AB: 20" 667x: Easy near equal white, 2"
19h 03m 39.66s +35° 44' 34.4" P.A. 193 sep 2.4 mag 8.75,8.80 Sp A3 dist. 228.83 pc (746.44 l.y.)

COU 1935 AB: 20" 667x: Very fine near equal, well split, 1", white. Verified on chart.
19h 04m 11.37s +38° 58' 47.4" P.A. 41 sep 1.1 mag 10.60,11.05

TDS 964 AB: 20" 667x: Very nice yellow A and fainter B, 1", 1.5-2 delta mag. Fine pair.19h 05m 11.00s +40° 22' 20.2" P.A. 73 sep 1.3 mag 9.94,11.21 Sp F8

ALI 614 AB: 20" 667x: Fainter pair of a double-double in field, both about the same wide separation 19h 05m 10.34s +38° 03' 25.9" P.A. 90 sep 10.1 mag 12.70,12.80

AG 227 AB: 20" 667x: This is the brighter pair of the double-double pair mentioned in last entry [ALI 614]. White stars, brilliant, wide separation
19h 05m 22.05s +38° 03' 20.6" P.A. 31 sep 7.1 mag 10.68,11.20

COU 1614 AB: 20" 667x: Very tough given the conditions, but getting a suspect elongation at 667x and at 1067x I get moments of a notch within the haze, and a definite magnitude difference. Marginal. Transparency and seeing not cooperating.
19h 06m 03.06s +35° 48' 45.5" P.A. 117 sep 0.5 mag 9.91,9.93 Sp F5

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