When is the best time to observe Pi Aquilae?

Pi Aquilae is best observed from June through August, with peak visibility during July when it transits around midnight in the Northern Hemisphere.

Where is Pi Aquilae located in the sky?

Pi Aquilae lies in the constellation Aquila at right ascension 19h 49m and declination +11° 49′.

What telescope do I need to split Pi Aquilae?

Splitting Pi Aquilae requires an aperture of roughly 150 mm or larger — the components are separated by about 1.4″ at magnitudes near 5.7. Larger apertures and steady seeing help resolve the pair cleanly.

Pi Aquilae — Double Star in Aquila

Observable Double Star Fair (27/100)

Sep: 1.4", Companion: mag 6.8

Magnitude 5.7^m DoubleStar Aquila (Aql) Visible

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Observe

1Physical Properties

Magnitude 5.72

Spectral Type G2III:+A1V: giant

Distance 1,087 ly

2Position & Identifiers

RA 19h 48m 42.1s

Dec +11° 48' 57.0"

Constellation Aquila (Aql)

HR 7544

HIP 97473

HD 187260

Bayer Pi

Flamsteed 52 Aql

Double Cat 12962

SIMBAD

3How easy to split?

Primary 5.7 mag Companion 6.8 mag Separation 1.4″

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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.	Hard+	Hard+	Hard+
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 Jun – Aug (peak: Jul)

5Multiple Star System Triple C: optical

Components 3 (triple)

Component IDs AB

Separation 1.4″

Companion Mag 6.8

Companion Sp F9III

Position Angle 104°

Star Colors B: Yellow

Discoverer STF2583

Notes

AB, >3000y.

Separation over time

Measured 1783 → 2021 (238 y)

Separation drift 1.4" → 1.4" (+0.00")

Rate +0.0000" / y

PA drift 124° → 104° (-20°, -0.084°/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.