skip to main content
US FlagAn official website of the United States government
dot gov icon
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
https lock icon
Secure .gov websites use HTTPS
A lock ( lock ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.


Title: New Observations of WDS 23516+0814
We report on our observations of the double star system WDS23516+0814 (CHE 506, HD 223638). We selected a double star system with a few historical observations to contribute to the determination of its possible orbit.  more » « less
Award ID(s):
2219043
PAR ID:
10554453
Author(s) / Creator(s):
; ; ; ; ; ; ; ; ; ;
Corporate Creator(s):
Editor(s):
Freed, R; Harshaw, R; Genet, Russell M
Publisher / Repository:
Online Journal - http://www.jdso.org
Date Published:
Journal Name:
Journal of double star observations
Volume:
20
Issue:
1
ISSN:
2572-4436
Page Range / eLocation ID:
22-25
Subject(s) / Keyword(s):
double star astrometry
Format(s):
Medium: X
Sponsoring Org:
National Science Foundation
More Like this
  1. Freed, R; Harshaw, R; Genet, Russell M (Ed.)
    This investigation selected a double star system: ES1144 (also known as HD67007A and HD67007B), which is an eclipsing binary and member of a quadruple star system. We report on our observations and measurements of position angle and separation using images taken with Las Cumbres Observatory telescopes. We found a separation of 6.7 arcsec and a position angle of 337°. We conclude that more observations will be required to establish the orbit of the system. 
    more » « less
  2. 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. 
    more » « less
  3. 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. 
    more » « less
  4. Freed, R; Harshaw, R; Genet, Russell M (Ed.)
    We report the measurement of the position angle and separation for the double star system HD 80460. We made use of a 0.4m telescope from Las Cumbres Observatory (LCOGT) and a DeltaRho 350 + QHY600 camera. An analysis was made with the historical data from the Washington Double Star (WDS) catalog. A search was made with SIMBAD for spectral type, parallax, and proper motion for the double star. 
    more » « less
  5. Abstract New results on the behavior of the double-mode RR Lyrae V338 Boo are presented. The Transiting Exoplanet Survey Satellite (TESS) observed this star again in 2022, and an observing campaign of the American Association of Variable Star Observers (AAVSO) was completed after the TESS observations as a follow-up. We find that the first overtone pulsation mode in this star completely disappears during the TESS observing window. This mode reappears at the end of the TESS observations, and the AAVSO observing campaign shows that in the months that followed, the first overtone mode was not only present but was the dominant mode of pulsation. This star, and potentially others like it, could hold the key to finally solving the mystery of the Blazhko effect in RR Lyrae. 
    more » « less