J/A+AS/114/281 NGC 7762: a moderate age open cluster (Patat+, 1995) ================================================================================ NGC 7762: a forgotten moderate age open cluster Patat F., Carraro G. =1995A&AS..114..281P (SIMBAD/NED BibCode) ================================================================================ ADC_Keywords: Clusters, open; Photometry, CCD Keywords: open clusters: NGC 7762 - HR diagram Description: We report CCD B and V photometry for the central region of the old open cluster NGC 7762. The cluster appears very loose and occupies a large sky area. The Colour Magnitude Diagram (CMD) shows a distinct Main Sequence (MS) down to V=~16.5, and a couple of evolved stars. The bottom of the sequence is characterized by a large spread, much greater than the expected broadness due to photometric errors, and probably related to low mass stars evaporation. The analysis here carried out allows us to conclude that NGC 7762 in an intermediate age cluster about 1.8Gyr old. The comparison with theoretical isochrones from the Padova group constrains colour excess and apparent distance modulus in the range 0.85-0.90 and 12.00-12.20, respectively. The distance to the Sun comes out to be 800 pc, somewhat lower than Chincarini's (1966MmSAI..37..423C) estimate. File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file table2 44 142 Photometry -------------------------------------------------------------------------------- Byte-by-byte Description of file: table2 -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 3 I3 --- ID Star identification number 6- 7 I2 --- C66 []? Chincarini numbering for common stars 10- 15 F6.2 pix Xpos X coordinate 18- 23 F6.2 pix Ypos Y coordinate 26- 30 F5.2 mag Vmag V magnitude 33- 37 F5.2 mag B-V B-V colour index 40- 44 F5.3 mag e_Vmag Error on V magnitude -------------------------------------------------------------------------------- ================================================================================ (End) Simona Mei [CDS] 05-Jul-1995