SIMBAD references

2000A&A...357..149D - Astronomy and Astrophysics, volume 357, 149-152 (2000/5-1)

Proper motion and membership determination in the young open cluster NGC 1662.

DIAS W.S., BOCZKO R., CAMARGO J.I.B., TEIXEIRA R. and BENEVIDES-SOARES P.

Abstract (from CDS):

Relative proper motions and cluster membership probabilities of 30 stars within an area of 14' of diameter centered in the open cluster NGC 1662 (α=04h48m, δ=+10°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 (1990A&A...237...54Z) method. The cluster proper motion was found to be (-3.2±0.6)mas/yr in right ascension and (-1.6±0.6)mas/yr in declination.

Abstract Copyright:

Journal keyword(s): astrometry - Galaxy: open clusters and associations: individual: NGC 1662

CDS comments: Table 3: numbers in USNO catalogue not identified

Simbad objects: 14

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2021.04.15-13:07:48

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