When is the best time to observe HIP 15411?

HIP 15411 is best observed from October through December, with peak visibility during November when it transits around midnight in the Northern Hemisphere.

Where is HIP 15411 located in the sky?

HIP 15411 lies in the constellation Eridanus at right ascension 03h 19m and declination -18° 34′.

What telescope do I need to split HIP 15411?

Splitting HIP 15411 requires an aperture of roughly 80 mm or larger — the components are separated by about 8.0″ at magnitudes near 5.7. Larger apertures and steady seeing help resolve the pair cleanly.

HIP 15411 — Double Star in Eridanus

Observable Double Star Good (58/100)

Sep: 8.0", Companion: mag 8.2

Magnitude 5.7^m DoubleStar Eridanus (Eri) Visible

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Observe

1Physical Properties

Magnitude 5.71

Spectral Type F0IV subgiant

Star Color Yellow-white (B-V 0.37)

Distance 112 ly

2Position & Identifiers

RA 03h 18m 41.2s

Dec -18° 33' 35.0"

Constellation Eridanus (Eri)

HR 997

HIP 15411

HD 20631

SAO 148897

Double Cat 2465

SIMBAD

3How easy to split?

Primary 5.7 mag Companion 8.2 mag Separation 8.0″

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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 Oct – Dec (peak: Nov)

5Multiple Star System

Separation 8.0″

Companion Mag 8.2

Position Angle 121°

Star Colors A: Yellow-white B: Orange

Discoverer HJ 3565

Notes

Binary.

Separation over time

Measured 1835 → 2020 (185 y)

Separation drift 5.8" → 8.0" (+2.20")

Rate +0.0119" / y

PA drift 110° → 121° (+11°, +0.059°/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.