When is the best time to observe HIP 8475?

HIP 8475 is best observed from September through November, with peak visibility during October when it transits around midnight in the Northern Hemisphere.

Where is HIP 8475 located in the sky?

HIP 8475 lies in the constellation Perseus at right ascension 01h 49m and declination +47° 54′.

What telescope do I need to split HIP 8475?

Splitting HIP 8475 requires an aperture of roughly 100 mm or larger — the components are separated by about 2.0″ at magnitudes near 5.8. Larger apertures and steady seeing help resolve the pair cleanly.

HIP 8475 — Double Star in Perseus

Observable Double Star Good (57/100)

Sep: 2.0", Companion: mag 7.2

Magnitude 5.8^m DoubleStar Perseus (Per) Visible

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Observe

1Physical Properties

Magnitude 5.82

Spectral Type A3V

Star Color White (B-V 0.29)

Distance 408 ly

2Position & Identifiers

RA 01h 49m 15.7s

Dec +47° 53' 49.0"

Constellation Perseus (Per)

HR 526

HIP 8475

HD 11031

SAO 37536

Double Cat 1438

SIMBAD

3How easy to split?

Primary 5.8 mag Companion 7.2 mag Separation 2.0″

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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 Sep – Nov (peak: Oct)

5Multiple Star System Quadruple D: optical

Components 4 (quadruple)

Component IDs AB

Separation 2.0″

Companion Mag 7.2

Position Angle 197°

Star Colors A: White B: Yellow

Discoverer STF 162

Notes

Component C 8.4v at 21", D 10.2v at 137".

Separation over time

Measured 1828 → 2020 (192 y)

Separation drift 2.2" → 2.0" (-0.20")

Rate -0.0010" / y

PA drift 227° → 197° (-30°, -0.156°/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.