NGC 1647 - Taurus

NGC1647 - - en la IA

NGC 1647 is an open cluster located in the constellation Taurus. Here's a breakdown of what's known about it:

Key Characteristics:

• Type: Open Cluster
• Constellation: Taurus
• Distance: Approximately 1750 - 1830 light-years (536 - 561 parsecs) from Earth
• Age: Relatively old for an open cluster, estimated to be around 1.5 to 2 billion years. This makes it significantly older than the Pleiades, for example.
• Diameter: The core of the cluster is about 4 parsecs in diameter, while its total extent is closer to 12 parsecs.
• Membership: It contains approximately 500 stars, with a well-defined tidal radius, and a core-halo structure.

Observations and Studies:

• Star Formation History: NGC 1647 has been studied to understand the formation and evolution of stars within it. Its age and composition make it valuable for testing stellar evolution models.
• Reddening: The cluster experiences significant interstellar reddening (light being scattered by dust), which makes its stars appear redder than they actually are. This reddening needs to be accounted for when determining the stars' true properties.
• Variable Stars: Studies have identified various variable stars within the cluster, including eclipsing binaries and pulsating variables.
• X-ray Sources: Research has investigated the X-ray emission from stars within NGC 1647, providing insights into the magnetic activity and properties of the cluster's stellar population.
• Location: It is located in a relatively low star density area of the sky, behind a larger, younger cluster known as the Hyades, making it a interesting subject for comparative studies of clusters in the same field of view.

Significance:

NGC 1647 is valuable for several reasons:

• Testing Stellar Evolution: Its age and distance make it a good testing ground for models of how stars evolve over time.
• Understanding Open Cluster Dynamics: Studying the distribution and properties of stars within the cluster helps astronomers understand the processes that shape and disperse open clusters.
• Distance Determination: Open clusters are important for calibrating the cosmic distance ladder.

How to Observe:

• Telescope: A small to medium-sized telescope will be needed to resolve the individual stars in NGC 1647.
• Location: Look for it in the constellation Taurus, near the Hyades cluster. Star charts and astronomy software can help you pinpoint its exact location.
• Conditions: Dark skies, away from city lights, are essential for a good view.