When is the best time to observe 29 Aquarii?

29 Aquarii is best observed from July through September, with peak visibility during August when it transits around midnight in the Northern Hemisphere.

Where is 29 Aquarii located in the sky?

29 Aquarii lies in the constellation Aquarius at right ascension 22h 02m and declination -16° 58′.

What telescope do I need to split 29 Aquarii?

Splitting 29 Aquarii requires an aperture of roughly 100 mm or larger — the components are separated by about 3.9″ at magnitudes near 6.4. Larger apertures and steady seeing help resolve the pair cleanly.

29 Aquarii — Double Star in Aquarius

Observable Variable Star

Range: 6.34 - 6.76, Period: 22.7h, Type: EA

Magnitude 6.4–6.8^m DoubleStar Aquarius (Aqr) Visible

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Observe

1Physical Properties

Magnitude 6.37

Range 6.34 - 6.76

Period 22.7 hours

Variable Type Eclipsing Binary (Algol-type)

Spectral Type A2V+K0III

Star Color White (B-V 0.42) (reddened by dust)

Distance 544 ly

2Position & Identifiers

RA 22h 02m 26.6s

Dec -16° 57' 51.0"

Constellation Aquarius (Aqr)

HR 8396

HIP 108797

HD 209278

SAO 164830

Flamsteed 29 Aqr

Variable ID DX Aqr

Double Cat 15562

SIMBAD

3How easy to split?

Primary 6.4 mag Companion 7.2 mag Separation 3.9″

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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 Jul – Sep (peak: Aug)

5Light Curve

6Comparison Stars for 29 Aqr (6.4–6.8)

Nearby stable stars for estimating brightness (AAVSO)

Loading comparison stars…

7Multiple Star System Triple C: optical

Components 3 (triple)

Component IDs AB

Separation 3.9″

Companion Mag 7.2

Companion Sp K0III

Position Angle 246°

Star Colors A: White (reddened by dust) B: Orange

Discoverer S 802

Notes

Component B, 7.2v, at 3.7" variously classified G2V, G2III:, K0III:; C 11.7v at 143".

Separation over time

Measured 1823 → 2023 (200 y)

Separation drift 4.5" → 3.9" (-0.60")

Rate -0.0030" / y

PA drift 244° → 246° (+2°, +0.010°/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.