When is the best time to observe HIP 6751?

HIP 6751 is best observed from September through November, with peak visibility during October when it transits around midnight in the Northern Hemisphere.

Where is HIP 6751 located in the sky?

HIP 6751 lies in the constellation Pisces at right ascension 01h 27m and declination +03° 32′.

What telescope do I need to split HIP 6751?

Splitting HIP 6751 requires an aperture of roughly 80 mm or larger — the components are separated by about 6.0″ at magnitudes near 6.6. Larger apertures and steady seeing help resolve the pair cleanly.

HIP 6751 — Double Star in Pisces

Magnitude 6.6^m DoubleStar Pisces (Psc) Visible

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Observe

1Physical Properties

Magnitude 6.58

Spectral Type B9V+A8V

Star Color Blue-white (B-V -0.04)

2Position & Identifiers

RA 01h 26m 53.5s

Dec +03° 32' 07.0"

Constellation Pisces (Psc)

HR 419

HIP 6751

HD 8803

SAO 109895

Double Cat 1148

SIMBAD

3How easy to split?

Primary 6.6 mag Companion 9.5 mag Separation 6.0″

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Telescope	Bortle 3	Bortle 4	Bortle 5
80 mm refractor 80mm refr.	Medium+	Medium+	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 6.0″

Companion Mag 9.5

Companion Sp A8V

Position Angle 329°

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

Discoverer STF 122

Notes

Binary. Companion 9.38V, +0.19(B-V), +0.00(U-B), A8V, vsini 48k/s.

Separation over time

Measured 1831 → 2020 (189 y)

Separation drift 7.2" → 6.0" (-1.20")

Rate -0.0063" / y

PA drift 314° → 329° (+15°, +0.079°/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.