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Sky-Tonight.com / Nebulae and Deep-Sky Objects / NGC6645

NGC6645 Position and Visibility Tonight

NGC6645

Where is NGC6645 right now?

NGC6645 is located in the constellation Sagittarius. It is currently below the horizon and is not visible from your location.
Twilight begins at 18:57 local time. At that moment, NGC6645 will be 34° above the horizon toward the south-east.

NGC6645 visibility on 2026-08-18

NGC6645 Visible from sunset until early morning

NGC6645 rise and set timetable

TimeElevation
Moonrise, 21% illuminated 09:49-58°
NGC6645 rise14:48
Sunset17:5529°
Civil sunset18:2432°
Twilight start18:5734°
Astronomical observing session begins19:3236°
NGC6645 transit19:5436°
Moonset20:2635°
NGC6645 set00:59
Astronomical observing session ends02:51-22°

Track NGC6645 Position Throughout the Night

← 18 August 2026 →

Elevation (degrees)
Time
Altitude
Azimuth
Shift the map to change the time and observe NGC6645 changing position in the night sky.

NGC6645 — Image Gallery

DSS Blue

NGC6645 — blue-filter image
Blue images highlight younger, hotter stars that emit strongly at blue wavelengths.

DSS Red

NGC6645 — red-filter image
Red images reveal older, cooler stars and emission nebulae glowing strongly in hydrogen-alpha light.

DSS Near-Infrared

NGC6645 — near-infrared image
Near-infrared images penetrate dust that obscures visible light and reveal hidden structures.

DSS Composite Image

NGC6645 — composite color image
DSS color images combine blue, red and often near-infrared exposures into a composite view.

The images come from the Digitized Sky Survey 2 (DSS2), produced at the Space Telescope Science Institute (STScI) under contract with NASA, using data from UK Science and Technology Facilities Council (STFC), European Southern Observatory (ESO), National Geographic Society-Palomar Observatory Sky Survey (POSS II).

Special thanks to National Optical Astronomy Observatory (NOAO), Royal Observatory, Edinburgh, California Institute of Technology for their significant contributions.

Finder Chart for NGC6645

Double-click to unlock the map.
Object nameNGC6645
Field of view
Limiting magnitude
NGC6645 coordinates18.54386, -16.88389
Center coordinates18.54386, -16.88389

NGC6645 Passage Through Night

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Current position of NGC6645

Time08:45
Latitude37.3541
Longitude-121.955
Elevation-67°
Azimuth32°
Here you can see the current position of NGC6645 on the map, as well as its positions for rise and set. This tool lets you track its movement throughout the night with accurate, up-to-date information.

Annual motion of NGC6645


NGC6645 will remain visible until October 25, when it moves too close to the Sun and temporarily disappears from the night sky. Time
DateTue, 18 August 2026
Twilight start19:28
Twilight end02:44
Twilight duration7h 17m
Rise14:44
Set00:55
Elevation at transit36°
Transit time19:50
Equatorial coordinatesRA: 18h 32m 37s", Dec: -16° 53' 02s
Magnitude9
ConstellationSagittarius
The graph illustrates the annual visibility pattern of NGC6645, including its daily appearances and transit times. The vertical axis shows the hours of the day and the horizontal axis spans the year. The reddish area marks when the object is above the horizon, while the white line marks its daily transit.
You can also view detailed visibility information in a table with exact rise, transit, and set times for each date.

Astrometric and Physical Parameters of NGC6645

Coordinates and Visibility

Right Ascension18.54386°
Declination-16.88389°
Magnitude8.50
ConstellationSagittarius
Elevation-66.8°
Azimuth31.6°

Data Credits

The deep-sky information on this page comes from the OpenNGC project developed by Matteo Verga. OpenNGC provides detailed catalog data for nebulae, galaxies, clusters and other deep-sky objects.

For details or contributions, visit the official repository: OpenNGC GitHub.