When is the best time to observe HIP 75151?

HIP 75151 is best observed from April through June, with peak visibility during May when it transits around midnight in the Northern Hemisphere.

Where is HIP 75151 located in the sky?

HIP 75151 lies in the constellation Lupus at right ascension 15h 22m and declination -38° 13′.

What telescope do I need to split HIP 75151?

Splitting HIP 75151 requires an aperture of roughly 80 mm or larger — the components are separated by about 5.3″ at magnitudes near 6.5. Larger apertures and steady seeing help resolve the pair cleanly.

HIP 75151 — Double Star in Lupus

Magnitude 6.5^m DoubleStar Lupus (Lup) Visible

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Observe

1Physical Properties

Magnitude 6.48

Spectral Type A0pSi

Star Color Blue-white (B-V -0.06)

2Position & Identifiers

RA 15h 21m 30.1s

Dec -38° 13' 09.0"

Constellation Lupus (Lup)

HR 5697

HIP 75151

HD 136347

SAO 206543

SIMBAD

3How easy to split?

Primary 6.5 mag Companion 9.3 mag Separation 5.3″

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

5Multiple Star System

Separation 5.3″

Companion Mag 9.3

Position Angle 120°

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

Discoverer HWE 76

Notes

Probable CPM.

Separation over time

Measured 1876 → 2020 (144 y)

Separation drift 4.0" → 5.3" (+1.30")

Rate +0.0090" / y

PA drift 130° → 120° (-10°, -0.069°/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.