or stars in the region around the open cluster NGC6530, cluster memberships are calculated based on the maximum likelihood principle using proper motions obtained from photographic plates acquired with the 40 cm refraction telescope at Shanghai Astronomical Observatory. Analyses show that the membership ...
olute proper motions of thecluster,and then we carl determine the space motion s of the cluster in the Galaxy.Itcall be seen from the values listed in the tabl e 5-2 that the cluster NGC6530 is veryc lose to the Galactic plane and it shoul d be a thin disk object from its posi...
Finder Chart for NGC 663 (credit:- freestarcharts)Finder Chart for NGC 663 - pdf format (credit:- freestarcharts)NGC 663 Data TableNGC 663 Caldwell 10 Object Type Open Cluster Constellation Cassiopeia Distance (light-years) 7,000 Apparent Mag. +7.1...
【星系吧】NGC天体..NGC 1是一个漩涡星系,在飞马座。直径约90,000光年,比银河系小。NGC 11860年使用时列表显示,这个星系有所有星系最低的经度,但是现在它已不是原来的位置,这个星系不再有NGC星系最低的经度
Galaxies: Star ClustersUsing HST images we have carried out a study of cluster populations in the nearby S0 galaxy NGC 1023. In two WFPC2 pointings we have identified 221 cluster candidates. The small distance (~9 Mpc) combined with deep F555W and F814W images allows us to reach about ...
NGC 752 is located 5 degrees south and slightly west of outstanding double starAlmach(γ And - mag. +2.1) the third brightest star in the constellation. It was discovered by Caroline Herschel on September 29, 1783 although it was probably observed sometime before 1654 by Italian astronomer...
「今日新发现:Globular Star Cluster NGC 6355 from Hubble」球状星团曾经统治银河系.当我们的银河系最初形成时,也许有数千个球状星团在银河系中漫游.如今,只剩下不到200个.在漫长的岁月中,许多球状星团被彼此之间或与银河系核心的多次致命交会所摧毁.幸存的球状星团"遗迹"比地球上的所有化石都更古老,比我们银...
star c Pup; not a true cluster-NGC 2575 Galaxy CNC 12.7 14.2 2.3' Sc NGC 2452 Pln Neb PUP 12.6 9.4 22'' 4(3) 17.5 -NGC 2577 Galaxy CNC 12.4 13 1.8' SO H II 259 NGC 2453 Opn CL PUP 8.3 - 5' I 2 p 30 9.5 -NGC 2578 Galaxy PUP 12.6 13.4 2.2' SBO-a H III 902 NGC ...
The Open Star Cluster NGC 1245 has a distance of about 2.5 kpc in the direction of the constellation Perseus. Like in NGC 2194 most bright stars of the cluster show a slightly blue color. These are the "normal" hydrogen core burning stars with their hot surface temperature. But there are...
The rich SMC star cluster NGC419 has recently been found to present both a broad main sequence turn-off and a dual red clump of giants, in the sharp colour-magnitude diagrams (CMD) derived from the High Resolution Channel of the Advanced Camera for Surveys on board the Hubble Space ...