When is the best time to observe HIP 109474?

HIP 109474 is best observed from July through September, with peak visibility during August when it transits around midnight in the Northern Hemisphere.

Where is HIP 109474 located in the sky?

HIP 109474 lies in the constellation Cepheus at right ascension 22h 11m and declination +70° 08′.

What telescope do I need to split HIP 109474?

Splitting HIP 109474 requires an aperture of roughly 60 mm or larger — the components are separated by about 14.8″ at magnitudes near 5.5. The companion is about 3.1 magnitudes fainter, so glare from the primary — not separation — sets the minimum aperture. Larger apertures and steady seeing help resolve the pair cleanly.

HIP 109474 — Double Star in Cepheus

Observable Double Star Good (56/100)

Sep: 14.8", Companion: mag 8.6

Magnitude 5.5^m DoubleStar Cepheus (Cep) Visible

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Observe

1Physical Properties

Magnitude 5.50

Spectral Type F2V

Star Color Yellow-white (B-V 0.38)

Distance 86 ly

2Position & Identifiers

RA 22h 10m 38.9s

Dec +70° 07' 58.0"

Constellation Cepheus (Cep)

HR 8474

HIP 109474

HD 210884

SAO 19922

Double Cat 15719

SIMBAD

3How easy to split?

Primary 5.5 mag Companion 8.6 mag Separation 14.8″

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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 Jul – Sep (peak: Aug)

5Multiple Star System

Separation 14.8″

Companion Mag 8.6

Position Angle 252°

Star Colors A: Yellow-white B: Orange

Discoverer STF2883

Notes

CPM.

Separation over time

Measured 1823 → 2024 (201 y)

Separation drift 14.8" → 14.8" (+0.00")

Rate +0.0000" / y

PA drift 255° → 252° (-3°, -0.015°/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.