J. H. Peña,¹ R. Peniche,^1,5 R. Garrido,² M. Paparo,³ and A. García–Cole⁴

¹ Instituto de Astronomía, Universidad Nacional Autónoma de México, Apdo. Postal 70–264, 04510, México, D. F., México (jhpena@astroscu.unam.mx)

² Instituto de Astrofísica de Andalucía, Camino Bajo de Huétor 50, Granada E–18008, Spain (garrido@iaa.es)

³ Konkoly Observatory, Budapest, Hungary, H–1525 Budapest, P. O. Box 67 (paparo@konkoly.hu)

⁴ Colegio de Ciencias y Humanidades, Universidad Nacional Autónoma de México, Cataratas y Llanura s/n, Jardines del Pedregal, Coyoacán, C. P. 04500, México, D. F., México (cole@ciencias.unam.mx)

⁵ Deceased February 20, 2002.

RESUMEN

Se presenta fotometría fotoeléctrica uvby—β del cúmulo abierto NGC 6882/5. Mediante la ya probada técnica fotoeléctrica de determinación de distancias, encontramos que existen al menos dos acumulaciones diferenciables de estrellas en la dirección del cúmulo. Se lleva a cabo una breve discusión sobre la naturaleza de las estrellas previamente determinadas como variables.

ABSTRACT

Unpublished uvby — β photoelectric photometry of the open cluster NGC 6882/5 is presented. Utilizing already tested distance determinations through photometric techniques, it is found that there are at least two distinct star accumulations in the direction of the open cluster NGC 6882/5. A brief discussion is made of the nature of the previously found short period variables.

Key Words: open clusters and associations: general — open clusters and associations: individual (NGC 6882/5) — stars: variables — techniques: photometric

Acknowledgements

We would like to thank the staff of the OAN for their assistance in securing the observations. This work was partially supported by Papiit IN110102, IN108106–3 and Conacyt through grants 3925E, E130–3059 and collaboration programs with the CSIC (Spain) and the Hungarian Academy of Sciences, which allowed reciprocal visits. Typing and proofreading were done by J. Orta, and J. Miller, respectively. C. Guzmán and A. Diaz assisted us in the computing. Part of these data has been presented by I. Prada as a MSc. thesis at UNAM. This research has made use of the Simbad databases operated at CDS, Strasbourg, France and NASA ADS Astronomy Query Form.

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