When is the best time to observe HIP 15876?

HIP 15876 is best observed from October through December, with peak visibility during November when it transits around midnight in the Northern Hemisphere.

Where is HIP 15876 located in the sky?

HIP 15876 lies in the constellation Perseus at right ascension 03h 24m and declination +33° 32′.

What telescope do I need to split HIP 15876?

Splitting HIP 15876 requires an aperture of roughly 100 mm or larger — the components are separated by about 4.7″ at magnitudes near 5.6. The companion is about 3.6 magnitudes fainter, so glare from the primary — not separation — sets the minimum aperture. Larger apertures and steady seeing help resolve the pair cleanly.

HIP 15876 — Double Star in Perseus

Magnitude 5.6^m DoubleStar Perseus (Per) Visible

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Observe

1Physical Properties

Magnitude 5.61

Spectral Type A0V

Star Color Blue-white (B-V -0.03)

2Position & Identifiers

RA 03h 24m 29.7s

Dec +33° 32' 09.0"

Constellation Perseus (Per)

HR 1019

HIP 15876

HD 20995

SAO 56419

Double Cat 2514

SIMBAD

3How easy to split?

Primary 5.6 mag Companion 9.3 mag Separation 4.7″

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Telescope	Bortle 3	Bortle 4	Bortle 5
80 mm refractor 80mm refr.	Hard+	Hard+	Hard+
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 Oct – Dec (peak: Nov)

5Multiple Star System Triple C: optical

Components 3 (triple)

Component IDs AB

Separation 4.7″

Companion Mag 9.2

Position Angle 153°

Star Colors A: Blue-white B: Yellow

Discoverer STF 382

Notes

AB CPM.

Separation over time

Measured 1831 → 2019 (188 y)

Separation drift 3.6" → 4.7" (+1.10")

Rate +0.0059" / y

PA drift 155° → 153° (-2°, -0.011°/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.