Had good seeing last night, a solid 8/10 at 333x, so I was able to spend most of my time at full aperture and also going after short period and other challenging pairs. I was glad of it, it was getting kind of boring to observe just with the 8-inch mask. I observed from 9:30pm to 1am, when the moon cleared a neighbor's roof and the transparency had become poor -- the moon casting a bright haze across the sky, making fainter pairs harder to resolve. After closing up the 20-inch I walked over to my newly mounted 6-inch f/15 refractor and spent some time on the moon, then Mars, both showing wonderful detail, and with high contrast despite the transparency.
TDT 152 AB: 508; 333x: Discovered in 1991. Well split and resolved, fairly faint, slight mag difference.
16H 56M 17.57S +18° 52' 04.2" P.A. 89 SEP 0.8 MAG 11.98,12.12
LDS 986 AB: 508; 205x: Physical pair. Wide separation, near equal pretty bright white stars
16H 56M 46.43S +25° 41' 02.0" P.A. 266 SEP 8.5 MAG 10.72,10.83
HEI 71 AB: 508; 205x: Close pair but easily split, light yellow stars, one delta mag.
16H 56M 53.03S +15° 40' 10.8" P.A. 253 SEP 1.3 MAG 10.39,11.40 SP G0
BRT2426 AB: 508; 205xx: Near equal easy pair, wide. Not physical
16H 57M 24.72S +21° 29' 40.1" P.A. 307 SEP 4.2 MAG 11.76,12.01
STT 320 AB: 508; 205x: White A, slightly orange B, wide, significant magnitude difference
16H 58M 12.20S +25° 20' 18.6" P.A. 252 SEP 5.8 MAG 8.47,11.79 SP F0 DIST. 158.73 PC (517.78 L.Y.)
A 351 AB: 508; 333x: Very finely split with just 333x, near equal light orange stars. Busy field, easy to make sketch to capture the orientation for short period project. 59 year period, near apastron, will tighten considerably by 2032.
17H 29M 20.05S +29° 23' 30.8" P.A. 60.6 SEP 0.568 MAG 9.70,9.95 SP K2 DIST. 23.76 PC (77.51 L.Y.)
KUI 83 AB: 508; 667x: AC is an ordinary wide pair 2 delta mag ~10". AB is a hairline split with 533x, and an obvious well split with 667x. Light orange stars, ~1 delta mag. Short period, 24.1 years, nearly circular orbit so it will be fun to follow it around.
17H 37M 10.76S +27° 53' 47.1" P.A. 155.1 SEP 0.34 MAG 9.81,10.40 SP M0V:P DIST. 29.49 PC (96.2 L.Y.)
A 235 AB: 508; 533x: Nice clean split, more than hairline, white stars, significant mag difference. With apodising mask. Currently at apastron, will make nearly half turn by 2040.
17H 53M 18.60S +24° 59' 29.0" P.A. 71.9 SEP 0.356 MAG 8.36,9.28 SP G8V DIST. 49.04 PC (159.97 L.Y.)
HU 581 AB: 508; 1067x: Snowman at 533x & 667x, clean split at 1067x & apodising mask, one delta mag. Amazing. Coalesces into two points, can easily tell orientation & magnitude difference for sketch. At apastron, it is on a nearly edge on orientation, will close rapidly within the next ten years to be too close for me to detect.
18H 22M 54.84S +14° 58' 11.0" P.A. 123.4 SEP 0.3 MAG 8.80,9.40 SP G0V DIST. 79.3 PC (258.68 L.Y.)
HU 1191 AB: 508; 1067x: V595 Lyr. Very tough! In unsettled seeing it is an elongation or lopsided at all powers. However at best moments it tightens enough to show a very subtle notch & also different brightness and color, A being light orange-yellow, and ~1 delta mag B a deeper orange. Discovered in 1902 at 0.2, it has only a 14.64 year period, it will make a rapid circuit to the other side by 2026 (though only 0.1"), and "widen" to 0.2" again by 2030. Should be fun to observe!
18H 46M 34.62S +38° 21' 04.0" P.A. 311.8 SEP 0.256 MAG 8.67,9.42 SP G9V DIST. 35.61 PC (116.16 L.Y.)
HO 581 AB: 508; 667x: Very subtly notched elongation at best, light orange stars. 25.63 year period, near apastron in a nearly circular orbit, it will widen slightly in the next 5 years and still be a detectable 0.2" in 2035.
19H 54M 58.40S +41° 52' 17.6" P.A. 49.1 SEP 0.31 MAG 8.03,8.72 SP G9V DIST. 46.23 PC (150.8 L.Y.)
STT 371 AB: 203; 333x: Bright pair showed best masked down to 8-inches. Near equal, white stars, perfect!
19H 15M 56.96S +27° 27' 21.4" P.A. 161 SEP 0.9 MAG 7.03,7.55 SP B8V DIST. 277.01 PC (903.61 L.Y.)
J 1263 BC: 508; 205x: AB is the easy bright light orange star and the very wide blue pair of BC, which are wide and ~1 delta mag. Not physical
19H 11M 28.70S +29° 53' 10.2" P.A. 40 SEP 8.6 MAG 12.90,14.00 DIST. 492.61 PC (1606.89 L.Y.)
STF 2483 AB: 508; 205x: Easy wide A is greenish yellow-white, and B is ice blue.
19H 12M 23.60S +30° 20' 51.9" P.A. 317 SEP 10 MAG 7.97,9.09 SP B9IV DIST. 515.46 PC (1681.43 L.Y.)
STF 2491 AB: 203; 205x: A is white, B is slightly bluish, ~1.5 delta mag, ~1"
19H 16M 11.63S +28° 16' 50.2" P.A. 230 SEP 1.4 MAG 8.58,9.71 SP AM DIST. 230.95 PC (753.36 L.Y.)
COU 420 AB: 203; 205x: Finely split, <2 delta mag, bluish B.
19H 08M 17.42S +25° 55' 25.4" P.A. 97 SEP 1.2 MAG 8.74,10.75 SP A0 DIST. 297.62 PC (970.84 L.Y.)
STF 2459 AB: 203; 205x: Easy wide, ~1 delta
19H 07M 22.01S +25° 58' 23.9" P.A. 232 SEP 13.8 MAG 9.12,10.07 SP A2
COU 1023 AB: 508; 1067x: Hairline split, very definite and consistent, near equal
19H 20M 23.74S +26° 30' 58.8" P.A. 146 SEP 0.3 MAG 9.50,9.50 SP A0
A 267 AB: 508; 667x: White stars hairline split, ~1 delta mag. Notched elongation at 533x.
19H 17M 31.08S +26° 37' 33.7" P.A. 181 SEP 0.4 MAG 10.00,10.40 SP B9
TDT 1250 AB: 508; 205x: Very finely split, faint blue pair, half delta mag.
19H 08M 51.33S +26° 03' 04.6" P.A. 172 SEP 1.2 MAG 11.92,12.10
HO 444 AB: 508; 333x: Close split <1", significant magnitude difference >1 delta. White stars
19H 09M 13.70S +26° 56' 07.3" P.A. 67 SEP 1.3 MAG 8.66,10.48 SP F5
TDS 972 AB: 508; 333x: Faint, finely split, slight mag difference
19H 09M 37.79S +26° 40' 32.3" P.A. 311 SEP 0.7 MAG 11.11,11.34
TDT 1262 AB: 508; 533x: Very faint, B is difficult, split and resolved with seeing, helped with foveal coaxing and I can hold it direct after. Noticeable magnitude difference, <1 delta.
19H 09M 42.80S +27° 14' 41.1" P.A. 92 SEP 0.7 MAG 12.08,12.28
AG 373 AB: 508; 205x: Light yellow-white A and deeper yellow B, ~2 delta mag, wide
19H 11M 20.45S +27° 05' 28.7" P.A. 328 SEP 3 MAG 10.40,11.10 SP K0
20H 47M 05.66S +19° 17' 47.5" P.A. 293 SEP 1.6 MAG 9.53,11.19 SP A3
No comments:
Post a Comment