Journal of Astronomy and Space Sciences

The Korean Space Science Society (한국우주과학회)
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Observation of Three Variable Stars and an Asteroid Using Small Telescopes in the United Arab Emirates (UAE)

  • Mohammad Sh. Odeh (Department of Applied Physics and Astronomy, University of Sharjah) ;
  • Mashhoor Al-Wardat (Department of Applied Physics and Astronomy, University of Sharjah)
  • Received : 2022.12.01
  • Accepted : 2023.01.04
  • Published : 2023.03.15
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Abstract

We present the results of using small telescopes in the United Arab Emirates (UAE) for observing variable stars and asteroids. Two telescopes, namely, 5" apochromatic refractor and 14" Schmidt-Cassegrain, at Al-Khatim Observatory (M44) were used for the observations. The targets were the three variable stars RR GEM, AG LMi, and DL CMi and the asteroid 22 Kalliope. We found a good consistency between our light curves and published ones for the calibration targets, i.e., the asteroid 22 Kalliope and the variable star RR GEM. According to previous studies, AG LMi has two suggested periods, 16.3 hours and 32.62 hours. Our results clearly confirm the second one, with a period of 32.6175 hours. The star DL CMi has several suggested periods as per previous studies, such as 4.0173 days, 1.9606 days, and 2.0086 days. Our observations confirm the first one, with a period of 4.0159 days. These results demonstrate the effectiveness of using small telescopes for observing variable stars and asteroids. This work provides some recommendations on using small telescopes for such observations.

Keywords

Acknowledgement

We thank Mr. Mohammad Talafha of the Sharjah Academy for Astronomy, Space Sciences, and Technology (SAASST) for his cooperation in observing the star DL CMi to confirm our results.

References

  1. Avvakumova EA, Malkov OY, Kniazev AY, Eclipsing variables: catalogue and classification, Astron. Nachr. 334, 860-865 (2013). https://doi.org/10.1002/asna.201311942
  2. Heinze AN, Tonry JL, Denneau L, Flewelling H, Stalder B, et al., A first catalog of variable stars measured by the asteroid terrestrial-impact last alert system (ATLAS), Astron. J. 156, 241 (2018). https://doi.org/10.3847/1538-3881/aae47f
  3. Jayasinghe T, Stanek KZ, Kochanek CS, The ASAS-SN all-sky catalog of bright variable stars, Am. Astron. Soc. Meet. Abstr. 52 (2020).
  4. Johnston WR, Asteroids with satellites database (2022) [Internet], viewed 2022 Dec 15, available from: http://www.johnstonsarchive.net/astro/astmoons/am-00022.html
  5. Mousavi-Sadr M, Ebadi H, BVR photometric study and absolute parameters of the eclipsing binary AG LMi, New Astron. 89, 101625 (2021). https://doi.org/10.1016/j.newast.2021.101625
  6. Otero SA, Wils P, New elements for 80 eclipsing binaries VII, Inf. Bull. Var. Stars. 5644, 1 (2005).
  7. Parrott D, Tycho tracker: a new tool to facilitate the discovery and recovery of asteroids using synthetic tracking and modern GPU hardware, J. Am. Assoc. Var. Star Obs. 48, 262 (2020).
  8. Samus' NN, Kazarovets EV, Durlevich OV, Kireeva NN, Pastukhova EN, General catalogue of variable stars: version GCVS 5.1, Astron. Rep. 61, 80-88 (2017). https://doi.org/10.1134/S1063772917010085
  9. Watson CL, Henden AA, Price A, The international variable star index (VSX), in the Society for Astronomical Sciences 25th Annual Symposium on Telescope Science, Big Bear Lake, CA, 23-25 May 2006.