When is the best time to observe HIP 77574?

HIP 77574 is best observed from April through June, with peak visibility during May when it transits around midnight in the Northern Hemisphere.

Where is HIP 77574 located in the sky?

HIP 77574 lies in the constellation Norma at right ascension 15h 50m and declination -45° 24′.

What telescope do I need to split HIP 77574?

Splitting HIP 77574 requires an aperture beyond typical amateur scopes — even 500 mm struggles against the primary's glare — the components are separated by about 0.7″ at magnitudes near 6.1. The companion is about 5.8 magnitudes fainter, so glare from the primary — not separation — sets the minimum aperture. Larger apertures and steady seeing help resolve the pair cleanly.

HIP 77574 — Double Star in Norma

Magnitude 6.1^m DoubleStar Norma (Nor) Visible

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Observe

1Physical Properties

Magnitude 6.12

Spectral Type A9III giant

Star Color Yellow-white (B-V 0.29)

2Position & Identifiers

RA 15h 50m 16.3s

Dec -45° 24' 06.0"

Constellation Norma (Nor)

HR 5872

HIP 77574

HD 141296

SAO 226263

SIMBAD

3How easy to split?

Primary 6.1 mag Companion 11.9 mag Separation 0.7″

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Telescope	Bortle 3	Bortle 4	Bortle 5
80 mm refractor 80mm refr.	V. hard	V. hard	V. hard
150 mm Newton 150mm Newt.	V. hard	V. hard	V. hard
Celestron C8 (203 mm SCT) C8 203mm	V. hard	V. hard	V. hard

Easy Medium Hard Very hard Impossible

Bortle 3 = rural · 4 = outer suburbs · 5 = suburbs

Out of reach for typical amateur telescopes, even at Bortle 3.

4Visibility

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Best season Apr – Jun (peak: May)

5Multiple Star System Triple

Components 3 (triple)

Component IDs AxBC

Separation 0.7″

Companion Mag 11.9

Position Angle 259°

Star Colors A: Yellow-white C: Orange

Discoverer DON 764

Separation over time

Measured 1928 → 2021 (93 y)

Separation drift 0.70" → 0.70" (+0.00")

Rate +0.0000" / y

PA drift 284° → 259° (-25°, -0.269°/y)

Essentially fixed on human timescales — the same view your grandchildren will see.

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.