Triangulum Galaxy
RA 1h 35m · Dec +30° 39′
10′

The third-largest member of the Local Group and the most distant object regularly visible to the naked eye under exceptional conditions. Low surface brightness makes it challenging; long exposures reveal the HII regions NGC 604 — one of the largest emission nebulae known — dotted through the spiral arms.

Galaxy

Triangulum Galaxy

M 33 · Triangulum
These photons are ~2.73 million years old
UV/IRUV/IR-cut. Blocks ultraviolet and infrared so refractor optics stay in focus across the visible band.ZWO Seestar S50ZWO Seestar S50Aperture 50mm · Focal length 250mm · f/5 · Apo triplet with ED element · Sony IMX462 colour CMOS sensor (1920 x 1080, 2.1MP)…View equipment →
Date
25/09/2025
Location
36.3858° N, 28.0412° E
Integration
28m (167 × 10s)
Software
ZWO Seestar app
Notes
·
Moon
🌒Waxing crescent, 10% lit
Plate solve
Centre RA
1h 35m 19.3s
Centre Dec
+30° 39′ 17″
Field
51.3′ × 91.1′
Pixel scale
2.37″/px
Orientation
84.4° E of N
Hemisphere
Northern
Also in this frame
NGC 604IC 135IC 136IC 143IC 139M33IC 142NGC 595IC 137NGC 603NGC 592IC 131IC 134IC 133IC 132NGC 588

Catalogued objects inside the plate-solved field, nearest the centre first. Highlighted names have their own photo here.

TelescopeZWO Seestar S50
CameraZWO Seestar S50 Camera
RigFamily Holiday Rig

Where to find it

Finder chart
+30°30′+31°1h32m1h34m1h36m1h38mM 33IC 136IC 143IC 131IC 139IC 142NGC 588IC 132IC 134IC 133NGC 604IC 135IC 140NGC 595IC 137NGC 603NGC 592NE51.3′ x 91.1′10′

Star field and catalogued objects inside the plate-solved field, oriented to the solve. Fully offline, from the bundled star and deep-sky catalogues.

Interactive sky chart centred on 1 35 19.3 +30 39 17. Drag to pan, scroll to zoom, click a star or object to identify it. Zoom in to the plate-solved field for the DSS survey photo; zoom out for constellation figures and neighbouring catalogue objects. Fully self-hosted: the star and deep-sky catalogues and the survey image are all served from this site, so nothing external loads. Imagery: DSS2 colour (STScI / POSS-II). Constellation figures © Dominic Ford (GPLv3).

Captured from · Ρόδος (Rhodes)
36.3858° N, 28.0412° E · view on OpenStreetMap ↗ · Place data © GeoNames (CC BY)

Frequently asked questions

What kind of object is M 33?
M 33 is a galaxy.
Which constellation is M 33 in?
M 33 lies in the constellation Triangulum.
How far away is M 33?
The light in this image left M 33 roughly ~2.73 million years ago, so that is how far back in time you are seeing it.
What are the coordinates of M 33?
M 33 sits at right ascension 01h 35m 19s and declination +30° 39′ 17″ (J2000).
When is the best time to photograph M 33?
M 33 rides highest in the evening sky around October, reaching about 84° above the horizon from around 36°N.
What else is in this frame?
The plate-solved field also contains NGC 604, IC 135, IC 136, IC 143, IC 139, IC 142, NGC 595, and IC 137, among others.
What equipment was used to photograph M 33?
This image of M 33 was captured with ZWO Seestar S50 and ZWO Seestar S50 Camera.
How much exposure time went into this image?
This image of M 33 represents 28m (167 × 10s) of total integration time.

Comments

Leave a comment

Your email is never shown. Comments are held for moderation before they appear.