When is the best time to observe HIP 2475?

HIP 2475 is best observed from August through October, with peak visibility during September when it transits around midnight in the Northern Hemisphere.

Where is HIP 2475 located in the sky?

HIP 2475 lies in the constellation Andromeda at right ascension 00h 31m and declination +33° 35′.

What telescope do I need to split HIP 2475?

Splitting HIP 2475 requires an aperture of roughly 60 mm or larger — the components are separated by about 56.3″ at magnitudes near 5.9. The companion is about 3.5 magnitudes fainter, so glare from the primary — not separation — sets the minimum aperture. Larger apertures and steady seeing help resolve the pair cleanly.

HIP 2475 — Double Star in Andromeda

Magnitude 5.9^m DoubleStar Andromeda (And) Visible

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Observe

1Physical Properties

Magnitude 5.87

Spectral Type K1III giant

Star Color Orange (B-V 1.14)

2Position & Identifiers

RA 00h 31m 25.6s

Dec +33° 34' 54.0"

Constellation Andromeda (And)

HR 122

HIP 2475

HD 2767

SAO 53956

SIMBAD

3How easy to split?

Primary 5.9 mag Companion 9.3 mag Separation 56.3″

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

5Multiple Star System

Separation 56.3″

Companion Mag 9.3

Position Angle 86°

Star Colors A: Orange

Discoverer HJ 5451

Separation over time

Measured 1827 → 2021 (194 y)

Separation drift 60.0" → 56.3" (-3.70")

Rate -0.0191" / y

PA drift 87° → 86° (-1°, -0.005°/y)

Apparent motion is significant on a human timescale — worth revisiting in a decade.

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.