When is the best time to observe HIP 17328?

HIP 17328 is best observed from October through December, with peak visibility during November when it transits around midnight in the Northern Hemisphere.

Where is HIP 17328 located in the sky?

HIP 17328 lies in the constellation Octans at right ascension 03h 43m and declination -85° 16′.

What telescope do I need to split HIP 17328?

Splitting HIP 17328 requires an aperture of roughly 150 mm or larger — the components are separated by about 1.9″ at magnitudes near 6.4. Larger apertures and steady seeing help resolve the pair cleanly.

HIP 17328 — Double Star in Octans

Magnitude 6.4^m DoubleStar Octans (Oct) Visible

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Observe

1Physical Properties

Magnitude 6.41

Spectral Type B9.5IV subgiant

Star Color Blue-white (B-V -0.01)

Distance 408 ly

2Position & Identifiers

RA 03h 42m 32.1s

Dec -85° 15' 44.0"

Constellation Octans (Oct)

HR 1271

HIP 17328

HD 25887

SAO 258356

SIMBAD

3How easy to split?

Primary 6.4 mag Companion 8.1 mag Separation 1.9″

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Telescope	Bortle 3	Bortle 4	Bortle 5
80 mm refractor 80mm refr.	Hard	Hard	Hard
150 mm Newton 150mm Newt.	Medium+	Medium+	Medium+
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 Oct – Dec (peak: Nov)

5Multiple Star System

Separation 1.9″

Companion Mag 8.1

Position Angle 251°

Star Colors A: Blue-white B: Yellow-white

Discoverer R 38

Separation over time

Measured 1871 → 2016 (145 y)

Separation drift 1.6" → 1.9" (+0.30")

Rate +0.0021" / y

PA drift 236° → 251° (+15°, +0.103°/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.