Monday, April 22, 2024

21 april 2024 movement pairs

Seeing was predicted to be good during the first half of the night, and excellent after 1am.  I opened up the 20-inch and hoped I could go after some pairs from my "movement" list.  I did catch a few.  Seeing was ok but not perfect.  A haze blew in from the ocean most of the night, getting thicker after midnight.  There was a nearly full moon, and the sky was filled with its glow because of the haze.  For the first few hours the moon was hidden behind the large meridian tree in a neighbor's yard, but eventually came out.  Since seeing didn't improve all that much I spent a half hour on the moon before closing up at 1am.

HU  718 AB: 508; 635x: With seeing, fainter B is seen with PA SW, good close split at this power (currently 0.237").  SOC grade 3 orbit, 140-year period, it is widening to apastron in the mid-2030s. 
09h 00m 30.68s +32° 25' 03.2" P.A. 42.00 sep 0.237" mag 9.30,9.49 Sp G5 dist. 89.05 pc (290.48 l.y.)


B  2530 AB: 508; 635x: Using the peephole in my eyepiece cap, I see an elongation with a weaker end tht the SE.  No notch visible, but an obvious magnitude difference. SOC grade 2 orbit, 34.8-year period, it will reach apastron in its nearly edge on orbit in 2030, then rapidly close to periastron in 2040.
09h 27m 46.78s -06° 04' 16.4" P.A. 143.00 sep 0.405" mag 5.63,7.52 Sp G2V dist. 30.41 pc (99.2 l.y.)


HU  716 AB: 508; 425x: Lovely light orange stars, >1 Dm, nice split at this magnitude, PA ESE.  This will close rapidly and turn E then N by 2045.
08h 31m 35.03s +34° 57' 58.5" P.A. 42.00 sep 0.491" mag 7.58,9.02 Sp G5 dist. 28.22 pc (92.05 l.y.)


BU 1422 AB: 508; 280x: Wide pair, near equal is the HJ, the BU is more closely separated, around 2", 1 Dm, B appears with foveal coaxing out of nowhere. -9% PRO, it is not likely binary.
09h 21m 12.70s +27° 27' 59.6" P.A. 358.00 sep 1.9 mag 10.47,12.90 Sp K0

A  1088 AB: 508; 1270x: Very weakest of elongations, appears the weak end is to the SSW, very difficult.  SOC grade 3 orbit, 134.9-year period, it is widening to split-ability by the mid-2030s to 2040s at around 0.25".
12h 00m 37.54s +69° 11' 07.8" P.A. 2.00 sep 0.196" mag 7.88,8.81 Sp F2V dist. 206.19 pc (672.59 l.y.)

BU  794 AB 508; 1270x: At all high powers, in moments of finest seeing, I see a very elongated & very subtlety notched pair on a W-E line, guess weaker is to E.  SOC grade 2 orbit, it will make a quarter turn to the south by 2050.
11h 53m 43.07s +73° 45' 21.6" P.A. 63.00 sep 0.506" mag 7.23,8.32 Sp F8V dist. 58.17 pc (189.75 l.y.)


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