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Astron. Astrophys. 333, 471-478 (1998)

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The overlapping open clusters NGC 1750 and NGC 1758

I. UBVRI -CCD photometry * **

D. Galadí-Enríquez 1, C. Jordi 1, E. Trullols 1, 2 and I. Ribas 1

1 Dept. d'Astronomia i Meteorologia, Univ. de Barcelona, Avda. Diagonal 647, E-08028 Barcelona, Spain
2 Dept. de Matemàtica Aplicada i Telemàtica, Univ. Politècnica de Catalunya, Avda. Victor Balaguer s/n, E-08800 Vilanova i la Geltrú, Spain

Received 29 December 1997 / Accepted 26 January 1998


The existence and relationship of the possible clusters NGC 1746, NGC 1750 and NGC 1758 has been a matter of discussion during the last decades. This star field is close to the galactic anticenter and lies in the direction of the Taurus dark cloud complex. As part of a comprehensive astrometric and photometric analysis of this zone, we present a brief historical introduction together with deep UBVRI -CCD photometry of the area. The presence of at least one cluster can be deduced from these data. This object has a position and apparent size compatible with those previously quoted for NGC 1750 and NGC 1758. It is not possible to distinguish the single or double nature of the cluster on the sole basis of our photometry and the spatial distribution of the stars. No photometric evidence was found for NGC 1746.

Key words: open clusters and associations: individual: NGC 1750 – open clusters and associations: individual: NGC 1758 – stars: early-type

* Based on observations made at the Centro Astronómico Hispano-Alemán and the Observatorio Astronómico Nacional in Calar Alto, Almería, Spain
** Table 5 is only available in electronic form from CDS via anonymous ftp, and by e-mail request to dgaladi@pchpc5.am.ub.es

Send offprint requests to: D. Galadí-Enríquez (dgaladi@pchpc5.am.ub.es)

© European Southern Observatory (ESO) 1998

Online publication: April 20, 1998