When is the best time to observe HIP 6427?

HIP 6427 is best observed from September through November, with peak visibility during October when it transits around midnight in the Northern Hemisphere.

Where is HIP 6427 located in the sky?

HIP 6427 lies in the constellation Cetus at right ascension 01h 23m and declination -19° 05′.

What telescope do I need to split HIP 6427?

Splitting HIP 6427 requires an aperture of roughly 80 mm or larger — the components are separated by about 5.1″ at magnitudes near 6.3. Larger apertures and steady seeing help resolve the pair cleanly.

HIP 6427 — Double Star in Cetus

Magnitude 6.3^m DoubleStar Cetus (Cet) Visible

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Observe

1Physical Properties

Magnitude 6.35

Spectral Type F6IV subgiant

Star Color Yellow (B-V 0.48)

Distance 408 ly

2Position & Identifiers

RA 01h 22m 30.5s

Dec -19° 04' 53.0"

Constellation Cetus (Cet)

HR 394

HIP 6427

HD 8350

SAO 147767

Double Cat 1106

SIMBAD

3How easy to split?

Primary 6.4 mag Companion 8.7 mag Separation 5.1″

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Telescope	Bortle 3	Bortle 4	Bortle 5
80 mm refractor 80mm refr.	Easy	Easy	Medium+
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 Sep – Nov (peak: Oct)

5Multiple Star System

Separation 5.1″

Companion Mag 8.7

Position Angle 72°

Star Colors A: Yellow B: Orange

Discoverer HJ 2043

Notes

CPM.

Separation over time

Measured 1830 → 2018 (188 y)

Separation drift 6.0" → 5.1" (-0.90")

Rate -0.0048" / y

PA drift 78° → 72° (-6°, -0.032°/y)

Slow change over generations — observable in lifetime comparisons.

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.