When is the best time to observe HIP 65728?

HIP 65728 is best observed from March through May, with peak visibility during April when it transits around midnight in the Northern Hemisphere.

Where is HIP 65728 located in the sky?

HIP 65728 lies in the constellation Ursa Major at right ascension 13h 28m and declination +59° 57′.

What telescope do I need to split HIP 65728?

Splitting HIP 65728 requires an aperture of roughly 60 mm or larger — the components are separated by about 182.1″ at magnitudes near 5.4. Larger apertures and steady seeing help resolve the pair cleanly.

HIP 65728 — Double Star in Ursa Major

Observable Double Star Good (48/100)

Sep: 182.1", Companion: mag 8.2

Magnitude 5.4^m DoubleStar Ursa Major (UMa) Visible

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Observe

1Physical Properties

Magnitude 5.40

Spectral Type A1Vn

Star Color White (B-V -0.01)

Distance 130 ly

2Position & Identifiers

RA 13h 28m 27.1s

Dec +59° 56' 45.0"

Constellation Ursa Major (UMa)

HR 5085

HIP 65728

HD 117376

SAO 16080

SIMBAD

3How easy to split?

Primary 5.4 mag Companion 8.2 mag Separation 182.1″

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Telescope	Bortle 3	Bortle 4	Bortle 5
80 mm refractor 80mm refr.	Easy	Easy	Easy
150 mm Newton 150mm Newt.	Easy	Easy	Easy
Celestron C8 (203 mm SCT) C8 203mm	Easy	Easy	Easy

Easy Medium Hard Very hard Impossible

Bortle 3 = rural · 4 = outer suburbs · 5 = suburbs

4Visibility

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Best season Mar – May (peak: Apr)

5Multiple Star System Triple

Components 3 (triple)

Component IDs AC

Separation 182.1″

Companion Mag 8.2

Position Angle 110°

Star Colors A: White C: Yellow

Discoverer S 649

Separation over time

Measured 1824 → 2016 (192 y)

Separation drift 182.3" → 182.1" (-0.20")

Rate -0.0010" / y

PA drift 111° → 110° (-1°, -0.005°/y)

Essentially fixed on human timescales — the same view your grandchildren will see.

Measured from the WDS observational archive. No orbital solution has been derived — most likely the period is too long to fit an orbit to the available measurement arc.