When is the best time to observe HIP 10633?

HIP 10633 is best observed from September through November, with peak visibility during October when it transits around midnight in the Northern Hemisphere.

Where is HIP 10633 located in the sky?

HIP 10633 lies in the constellation Perseus at right ascension 02h 17m and declination +57° 03′.

What telescope do I need to split HIP 10633?

Splitting HIP 10633 requires an aperture of roughly 60 mm or larger — the components are separated by about 102.8″ at magnitudes near 6.5. Larger apertures and steady seeing help resolve the pair cleanly.

HIP 10633 — Double Star in Perseus

Magnitude 6.5^m DoubleStar Perseus (Per) Visible

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Observe

1Physical Properties

Magnitude 6.48

Range 6.44 - 6.53

Period 5.6 days

Variable Type ACYG

Spectral Type B1Iab supergiant

Star Color Yellow-white (B-V 0.28)

2Position & Identifiers

RA 02h 16m 51.7s

Dec +57° 03' 19.0"

Constellation Perseus (Per)

HR 654

HIP 10633

HD 13854

SAO 23115

Variable ID Var?

SIMBAD

3How easy to split?

Primary 6.5 mag Companion 7.4 mag Separation 102.8″

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Telescope	Bortle 3	Bortle 4	Bortle 5
80 mm refractor 80mm refr.	Easy	Easy	Easy
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)

5Light Curve

6Multiple Star System

Separation 102.8″

Companion Mag 7.4

Position Angle 205°

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

Discoverer STTA 25

Separation over time

Measured 1875 → 2015 (140 y)

Separation drift 102.9" → 102.8" (-0.10")

Rate -0.0007" / y

PA drift 204° → 205° (+1°, +0.007°/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.