Proper motion and membership determination in the young open cluster NGC1662

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dc.creatorDias, W. S.
dc.creatorBoczko, R.
dc.creatorCamargo, J. I. B.
dc.creatorTeixeira, R.
dc.creatorBenevides-Soares, P.
dc.date2000-03-29
dc.date.accessioned2026-07-07T01:52:57Z
dc.date.available2026-07-07T01:52:57Z
dc.descriptionRelative proper motions and cluster membership probabilities of 30 stars within an area of 14' of diameter centered in the open cluster NGC1662 (α=04^{\rm h}48^{\rm m}, δ=+10^{\rm o}56') are determined by combining positions of stars observed by the Valinhos CCD meridian circle with those from other astrometric catalogues. Our basic source for first epoch of stars brighter than B=13 magnitudes is the AC2000 Catalogue, which provides a time baseline of about 90 years, whereas the USNO-A2.0 Catalogue is used for fainter stars, providing a time baseline of about 40 years in this region. Average accuracies in proper motion of 2 mas/yr and 7 mas/yr are achieved, respectively, when the AC2000 or the USNO-A2.0 is used. Membership determination is obtained by applying the Zhao & He (1990) method. The cluster proper motion was found to be (-3.2\pm 0.6) mas/yr in right ascension and (-1.6\pm 0.6) mas/yr in declination.
dc.description3 pages, 2 PostScript figures, accepted for publication in Astronomy and astrophysics main journal
dc.identifierhttps://arxiv.org/abs/astro-ph/0003440
dc.identifierhttp://arxiv.org/abs/astro-ph/0003440
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/795
dc.subjectAstrophysics
dc.titleProper motion and membership determination in the young open cluster NGC1662
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