NGC 6864 Globular Cluster
Open cluster

NGC 6864 Globular Cluster

M 75 · Sagittarius
These photons are ~68,000 years old
UV/IR
Date
2025-09-22
Location
36.3857° N, 28.0415° E
Integration
9m (51 × 10s)
Software
ZWO Seestar app
Notes
—
Plate solve
Centre RA
20h 07m 06.1s
Centre Dec
−21° 46′ 33″
Field
42.7′ × 76.0′
Pixel scale
2.37″/px
Orientation
176.3° E of N
TelescopeZWO Seestar S50
CameraZWO Seestar S50 Camera
RigFamily Holiday Rig
Captured from · Ελλάς
36.3857° N, 28.0415° E · open map ↗

Where to find it

Interactive sky chart centred on 20 07 06.1 -21 46 33, with constellation stick figures overlaid. Locate shows the whole constellation with the target ringed; Field zooms to the close-up. Drag to pan, scroll to zoom, click any star to identify it. Imagery: DSS colour survey via CDS Aladin Lite. Constellation figures © Dominic Ford (GPLv3).

One of the most distant and most concentrated Messier globular clusters. Appears almost stellar at low magnification due to its high central density and remote distance.

Frequently asked questions

What kind of object is M 75?
M 75 is an open cluster.
Which constellation is M 75 in?
M 75 lies in the constellation Sagittarius.
How far away is M 75?
The light in this image left M 75 roughly ~68,000 years ago, so that is how far back in time you are seeing it.
What are the coordinates of M 75?
M 75 sits at right ascension 20h 07m 06s and declination −21° 46′ 33″ (J2000).
When is the best time to photograph M 75?
M 75 rides highest in the evening sky around July, reaching about 15° above the horizon from around 54°N.
What equipment was used to photograph M 75?
This image of M 75 was captured with ZWO Seestar S50 and ZWO Seestar S50 Camera.
How much exposure time went into this image?
This image of M 75 represents 9m (51 × 10s) of total integration time.