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1. Astrometric Measurements of 3 Binary Star Systems: WDS 00033+5332, WDS 05283+0358, and WDS 19557+3805

   Lo, J; Lindhe-Johan, A; Briggs, A; Smith, N; Stierwalt, S (April 2024, Journal of double star observations)

   Freed, R; Harshaw, R; Genet, Russell M (Ed.)

   We have taken astrometric measurements of three star systems: WDS 00033+5332 A 1500 AB,C, WDS 05283+0358 HJ 2266, and WDS 19557+3805 DAM 1 AB. We used the Las Cumbres Observatory telescopes to take images of these star systems, and we then analyzed them using Afterglow Workbench. For WDS 00033+5332, we found the position angle to be 81.62° ± 0.45° and an angular separation of 9.01’’ ± 0.04’’. Based on our analysis, we were not able to determine whether the WDS 00033+5332 double is physical. For WDS 05283+0358, we found the position angle to be 37.58° ± 0.15° and an angular separation of 7.29’’ ± 0.04’’. It is already known that WDS 05283+0358 is a physical double, and our new data supports this claim. For WDS 19557+3805, we found the position angle to be 234.64° ± 0.63° and an angular separation of 6.89’’ ± 0.10’’. Our new data points suggest this system is gravitationally bound 

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2. Astrometric Measurements of Binary Star Systems WDS 19576+3454, WDS 06076+2457, and WDS 06043+2327

   Grasso, A; Keldsen, I; Lo, J; Sagarin, E; Stierwalt, S (October 2024, Journal of Double Star Observations)

   Freed, R; Harshaw, R; Genet, Russell M (Ed.)

   We used the Las Cumbres Observatory telescopes to take images of three star systems: WDS 19576+3454, WDS 06043+2327, and WDS 06076+2457, on April 3rd, April 8th, and April 4th, 2024 respectively. We analyzed their astronomical measurements using Afterglow Workbench. For WDS 19576+3454, the position angle was measured to be 265.2° ± 0.12° with an angular separation of 7.38” ± 0.022”. For WDS 06043+2327, the position angle was measured to be 298.5° ± 0.28° with an angular separation of 9.83” ± 0.036”. The new data show that both WDS 19576+3454 and WDS 06043+2327 are consistent with being physical binaries but the parallax distances from the GAIA data suggest the stars in these pairs are too far apart to be gravitationally bound. Thus we conclude these two pairs are likely optical doubles. For WDS 06076+2457, the position angle was measured to be 348.1° ± 0.10° with an angular separation of 7.96” ± 0.023”. The new data we observed, combined with available GAIA data, give evidence that WDS 06076+2457 may be a physical double. 

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3. New Astrometric Measurements of WDS 18234-4819 B938

   Andrukhiv, V; Lys, S; Marcel, M C (July 2024, Journal of Double Star Observations)

   Freed, R; Harshaw, R; Genet, Russell M (Ed.)

   This research delves into the analysis of the WDS 18234-4819 B 938 double-star system situated within the Telescopium constellation. Utilizing our observations, data from the Gaia Data Release 3 mission, and historical records, new measurements of the position angle and separation were acquired. The results indicate a position angle of 342.6° and a separation of 8.39", showcasing an observable increase in comparison to historical data. Furthermore, an exploration of the parallax and proper motion values suggests disparate distances from Earth and a lack of gravitational binding between the stars. Consequently, the WDS 18234-4819 B 938 double-star system is classified as an optical double. To affirm this conclusion, we advocate for future studies to monitor dynamic changes in system parameters. 

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4. New Astrometric Measurements of the Position Angle and Separation of the Double Star System WDS 03245+5938 STI 450

   Marcel, M C; Sani, I A; JGerald, J L; Pius, P; Ekwu, O M; Bvumbwe, B; Sudum, E; Olayiwola, J U (January 2024, Journal of Double Star Observations)

   Freed, R; Harshaw, R; Genet, Russell M (Ed.)

   We report new measurements of the position angle and separation of the double star WDS 03245+5938 STI 450, based on our observations, Gaia EDR3, and historical data. We find that the position angle and separation are 209.7° and 7.68", respectively, showing slight changes from the previous values of 210° and 7.742". We also find that the distances between the two stars are far apart, suggesting that the system is an optical double, and therefore not gravitationally bound together. Furthermore, we find that the ratio of proper motion (rPM) metric of the system is distinct, indicating that the system is a chance alignment of two unrelated stars that are at different distances. 

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5. Measurement of the Double Star System WDS 03286+2523 BRT 133 with a Web Telescope

   Marcel, M C; Gerald, J L; Bvumbwe, B; Sani, I A; Pius, P; Ekwu, O M; Sudum, E; Olayiwola, J U (January 2024, Journal of Double Star Observations)

   Freed, R; Harshaw, R; Genet, Russell M (Ed.)

   WDS 03286+2523 BRT 133, is a double-star system that has been under observation since 1896. In this study, we present new measurements of the position angle and separation of the system, utilizing data obtained from a web telescope with a Charged Couple Device (CCD) camera, Gaia EDR3, and historical records. We determined that the position angle and separation are 222.4° and 5.35", respectively, indicating a slight increase from the previous values of 222° and 5.34" measured in 2004. We also employed the parallax and the ratio of proper motion metric (rPM) values of the system to assess its binarity. This analysis showed that the system may be gravitationally bound and with a long orbital period. 

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