When is the best time to observe HR 6263?

HR 6263 is best observed from April through June, with peak visibility during May when it transits around midnight in the Northern Hemisphere.

Where is HR 6263 located in the sky?

HR 6263 lies in the constellation Scorpius at right ascension 16h 54m and declination -41° 51′.

What telescope do I need to split HR 6263?

Splitting HR 6263 requires an aperture of roughly 60 mm or larger — the components are separated by about 31.0″ at magnitudes near 6.5. Larger apertures and steady seeing help resolve the pair cleanly.

HR 6263 — Double Star in Scorpius

Magnitude 6.3–6.5^m DoubleStar Scorpius (Sco) Visible

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Observe

1Physical Properties

Magnitude 6.45

Spectral Type O9Ib supergiant

Star Color Yellow-white (B-V 0.20)

2Position & Identifiers

RA 16h 54m 11.8s

Dec -41° 51' 01.0"

Constellation Scorpius (Sco)

HR 6263

HD 152249

SAO 227383

3How easy to split?

Primary 6.5 mag Companion 7.7 mag Separation 31.0″

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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 Apr – Jun (peak: May)

5Multiple Star System

Separation 31.0″

Companion Mag 7.7

Position Angle 35°

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

Discoverer WFC 183

Separation over time

Measured 1901 → 2022 (121 y)

Separation drift 30.6" → 31.0" (+0.40")

Rate +0.0033" / y

PA drift 37° → 35° (-2°, -0.017°/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.