When is the best time to observe HIP 76371?

HIP 76371 is best observed from April through June, with peak visibility during May when it transits around midnight in the Northern Hemisphere.

Where is HIP 76371 located in the sky?

HIP 76371 lies in the constellation Lupus at right ascension 15h 36m and declination -44° 58′.

What telescope do I need to split HIP 76371?

Splitting HIP 76371 requires an aperture of roughly 100 mm or larger — the components are separated by about 2.1″ at magnitudes near 4.5. Larger apertures and steady seeing help resolve the pair cleanly.

HIP 76371 — Double Star in Lupus

Observable Double Star Good (51/100)

Sep: 2.1", Companion: mag 6.5

Magnitude 4.5^m DoubleStar Lupus (Lup) Visible

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1Physical Properties

Magnitude 4.54

Range 4.70 - 4.72

Period 2.1 days

Variable Type SX Arietis (Magnetic Rotating)

Spectral Type B3IVp supergiant

Star Color Blue (B-V -0.18)

Distance 233 ly

2Position & Identifiers

RA 15h 35m 53.2s

Dec -44° 57' 31.0"

Constellation Lupus (Lup)

HR 5781

HIP 76371

HD 138769

SAO 225950

Variable ID Var?

SIMBAD

3How easy to split?

Primary 4.5 mag Companion 6.5 mag Separation 2.1″

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Telescope	Bortle 3	Bortle 4	Bortle 5
80 mm refractor 80mm refr.	Hard+	Hard+	Hard+
150 mm Newton 150mm Newt.	Medium+	Medium+	Medium+
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 Apr – Jun (peak: May)

5Light Curve

6Multiple Star System

Separation 2.1″

Companion Mag 6.5

Position Angle 12°

Star Colors A: Blue B: White

Discoverer HJ 4788

Separation over time

Measured 1851 → 2016 (165 y)

Separation drift 2.6" → 2.1" (-0.50")

Rate -0.0030" / y

PA drift 354° → 12° (+18°, +0.109°/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.