When is the best time to observe 2 Scorpii?

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

Where is 2 Scorpii located in the sky?

2 Scorpii lies in the constellation Scorpius at right ascension 15h 54m and declination -25° 20′.

What telescope do I need to split 2 Scorpii?

Splitting 2 Scorpii requires an aperture of roughly 100 mm or larger — the components are separated by about 2.0″ at magnitudes near 4.6. Larger apertures and steady seeing help resolve the pair cleanly.

2 Scorpii — Double Star in Scorpius

Observable Double Star Good (47/100)

Sep: 2.0", Companion: mag 7.0

Magnitude 4.6^m DoubleStar Scorpius (Sco) Visible

Star Map + List + Plan

Observe

1Physical Properties

Magnitude 4.59

Spectral Type B2.5Vn

Star Color Blue (B-V -0.07)

Distance 544 ly

2Position & Identifiers

RA 15h 53m 36.7s

Dec -25° 19' 38.0"

Constellation Scorpius (Sco)

HR 5904

HIP 77840

HD 142114

SAO 183896

Flamsteed 2 Sco

Double Cat 9823

SIMBAD

3How easy to split?

Primary 4.6 mag Companion 7.0 mag Separation 2.0″

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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	Medium+	Medium+	Medium+

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 2.0″

Companion Mag 7.0

Position Angle 273°

Star Colors A: Blue B: White

Discoverer BU 36

Notes

CPM. Combined mag., color.

Separation over time

Measured 1855 → 2019 (164 y)

Separation drift 2.6" → 2.0" (-0.60")

Rate -0.0037" / y

PA drift 278° → 273° (-5°, -0.030°/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.