Orion / Canis Major / Canis Minor

Winter Triangle

Great Southern Triangle

common observer pattern · high confidence

Betelgeuse, Sirius, and Procyon make a compact winter landmark. From 50°N it clears the southeast in early evening by midwinter and is brilliant even through light haze.

Central RA: 06^h 46^m 31.7^s
Central Dec: −01° 21′ 41″
Brightest member: V -1.46
Best months from 50°N: December–March evenings
Suggested instrument: naked-eye
Approx. span: 27.1°

Finder context

Use the nearby bright stars to locate the gold box, then move to the larger chart for the pattern itself.

Framing: Approximate member-star span: 27.1°; use at least 37.9° field for context.

Observing and imaging

Naked eye

Start with the unaided eye. Suburban skies usually show the main stars.

Binoculars

Binoculars are optional: use them to check colours, nearby doubles, or richer Milky Way background.

Small scope

A telescope is usually too narrow for the whole shape; use it after the pattern has guided you to a target.

Imaging

Frame a 38° field around Orion / Canis Major / Canis Minor to include the pattern and its nearby stars.

Tonight from your latitude

Set your location and date to see a useful window, peak altitude, sky visibility, and Moon conditions. Use Month to compare the season ahead.

Latitude 50°NLongitude -114°Date Month Sky darkness Bortle 4 · limit V 6.1

Naked-eye visibility by sky class

Bortle class rates night-sky brightness. The atlas counts a pattern as recognisable when at least 70% of its defining stars are visible.

Bortle 3: 3/3 stars — fully visibleBortle 5: 3/3 stars — fully visibleBortle 7: 3/3 stars — fully visible

Moon impact

For 50°N in the best month, green dates mark at least two hours with the pattern above 20° and the Moon below the horizon.

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Member stars

Name	Bayer / Flamsteed	HR	RA J2000	Dec J2000	V mag
Sirius	9Alp CMa	HR 2491	06^h 45^m 08.9^s	−16° 42′ 58″	-1.46
Procyon	10Alp CMi	HR 2943	07^h 39^m 18.1^s	+05° 13′ 30″	0.38
Betelgeuse	58Alp Ori	HR 2061	05^h 55^m 10.3^s	+07° 24′ 25″	0.50

Source and confidence

common observer pattern; high confidence. Widely used observing pattern across several constellations.

Citations

Bright Star Catalogue, 5th Revised Ed.: Hoffleit, D. & Warren, W.H. Jr. (1991). Positions, V magnitudes, Bayer/Flamsteed identifiers. source
Star Tales: Ridpath, I. Constellation and asterism notes used to cross-check common sky-pattern names. source
The Hipparcos and Tycho Catalogues: ESA SP-1200 (1997). Used as the modern astrometric reference named by the atlas; the MVP pages expose BSC5 J2000 fields for the plotted bright-star members.