Asterism Atlas

Named star patterns beyond the official constellations.

Ursa Minor

Little Dipper

Little Bear dipper

skylore / traditional name · medium confidence

A fainter dipper wrapped around the north celestial pole. Polaris and Kochab are easy; the middle stars are a useful naked-eye transparency test from Alberta suburbs.

Central RA
16h 23m 29.2s
Central Dec
+79° 37′ 57″
Brightest member
V 2.02
Best months from 50°N
Year-round from 50°N; best when highest above the pole
Suggested instrument
naked-eye
Approx. span
18.9°
21Eta UMi (HR 6116) — V 4.9523Del UMi (HR 6789) — V 4.3616Zet UMi (HR 5903) — V 4.3222Eps UMi (HR 6322) — V 4.23Pherkad / 13Gam UMi (HR 5735) — V 3.05Kochab / 7Bet UMi (HR 5563) — V 2.08Polaris / 1Alp UMi (HR 424) — V 2.02PolarisKochabPherkadbrighter → largerV 1 reference1V 3 reference3V 5 reference5
Ursa Minor contextBright stars nearby; gold box marks the patternNE

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: 18.9°; use at least 26.4° 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 26° field around Ursa 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.

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: 7/7 stars — fully visibleBortle 5: 7/7 stars — fully visibleBortle 7: 6/7 stars — partial

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

NameBayer / FlamsteedHRRA J2000Dec J2000V mag
Polaris1Alp UMiHR 42402h 31m 48.7s+89° 15′ 51″2.02
Kochab7Bet UMiHR 556314h 50m 42.3s+74° 09′ 20″2.08
Pherkad13Gam UMiHR 573515h 20m 43.7s+71° 50′ 02″3.05
22Eps UMi22Eps UMiHR 632216h 45m 58.1s+82° 02′ 14″4.23
16Zet UMi16Zet UMiHR 590315h 44m 03.5s+77° 47′ 40″4.32
23Del UMi23Del UMiHR 678917h 32m 12.9s+86° 35′ 11″4.36
21Eta UMi21Eta UMiHR 611616h 17m 30.3s+75° 45′ 19″4.95

Source and confidence

skylore / traditional name; medium confidence. Traditional or folk name recorded in older star-name literature.

Citations